PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A

PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condIn liquid-volume measure using the english system, 1 gallon is equal to 4 quarts or_ 128 fluid ounces 2. The International System of units is another name for the_ metric system 3. Floor space is measured in_ Area 4. A three-sided figure with two sides of equal length is called a(n)_ Isosceles Triangle 5. A typical cause of siphonage and back pressure is _ Improper DWV Venting 6. The same basic internal parts are used on angle valves, compression faucets, and _ Globe valves 7. At the end of each workday, all installed pipes should be _ capped 8. The purpose of the quartz sleeve in an ultraviolet-light system is to _ Prevent the water in the disinfecting chamber from cooling the lamp 9. Water that contains a high percentage of minerals is called _ hard water 10. Water Hardness is measured in grains per _ cubic centimeter 11. The water line supplying a swimming pool requires the installation of a(n) _ Pressure-type vacuum breaker 12. Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _ are not normally fitted with shutoff valves or test cocks 13. Plumbing codes require the installation of reduced-pressure zone principle backflow preventer assemblies in _ car washes 1 / 5 PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A Study online at 14. To prevent clogging by foreign matter in the water, many backflow preventers _ are equipped with strainers 15. The difference in elevation between the supply line and the system's highest fixture is called _ Static Head Loss 16. A cross-connection becomes dangerous when there is a _ backflow 17. If a leak is too small for escaping smoke to be visible, the leak may be detected by _ the odor of the smoke 18. The central vent in a building is the _ vent stack 19. Calcium and magnesium salts in water are the cause of _ hardness 20. Acid in the water can react with copper pipes to leave stains that are _ green 21. The number of types of simple machines is _ six 22. For calculating area, lengths and widths are expressed in _ multiples of 12 23. To determine the proper measurements for a floor, always refer to the _ scale on the construction drawings 24. One cubic foot of water has a weight of _ 62.31 pounds 25. Increasing the temperature of water will _ decrease its density but increase its volume 26. An efficient water supply system should provide, under peak demand condADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED APLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A