Refrigeration And Air Conditioning Technology 8th Edition Tomczyk - Test Bank

1. The component used to switch the heat pump unit between the heating and cooling modes of operation is the ____. a. four-way valve b. bi-valve c. two-way valve d. switching valve ANSWER: a POINTS: 1 REFERENCES: Reverse-Cycle Refrigeration QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:31 PM 2. An air-to-air heat pump ____ heat from the outside air and deposits it in the conditioned space. a. adds b. removes c. creates d. restricts ANSWER: b POINTS: 1 REFERENCES: Heat Sources for Winter QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:32 PM 3. The main valve in a pilot-operated four-way reversing valve is moved by pressure created by the ____. a. refrigerant boiling in the coil b. pressure reduction in the condenser c. change in the action of the metering device d. low and high side pressure difference ANSWER: d POINTS: 1 REFERENCES: The Four-Way Reversing Valve QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:33 PM 4. The larger line in an air-to-air split-system heat pump is known as the ____ line. a. vapor b. liquid c. transient d. gas ANSWER: d POINTS: 1 REFERENCES: Refrigerant Line Identification QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:34 PM 5. The smaller line in an air-to-air split-system heat pump is known as the ____ line. a. gas b. vapor c. solid d. liquid ANSWER: d POINTS: 1 REFERENCES: Refrigerant Line Identification QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:35 PM 6. Termination of the defrost cycle by temperature occurs when the temperature sensor reaches ____. a. 35°F b. 45°F c. 50°F d. 65°F ANSWER: c POINTS: 1 REFERENCES: The Defrost Cycle QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:36 PM 7. A common method of starting defrost uses an air pressure switch that measures the difference in pressure ____. a. between the fan compartment and the evaporator coil b. between the outdoor pressure and the fan discharge pressure c. of the air across the outdoor coil d. of the refrigerant in the condenser and the pressure in the coil ANSWER: c POINTS: 1 REFERENCES: The Defrost Cycle QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:38 PM 8. What prevents cold air from being circulated to the heated space during the defrost cycle? a. The auxiliary heater turns on to "temper" the air. b. All of the dampers close automatically. c. The indoor fan motor turns off. d. Both a and b are correct. ANSWER: a POINTS: 1 REFERENCES: The Defrost Cycle QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:39 PM 9. When brazing a four-way reversing valve, a wet rag could be wrapped around the body of the valve to minimize the chance of internal damage to the valve. a. True b. False ANSWER: True POINTS: 1 REFERENCES: The Four-Way Reversing Valve QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:40 PM 10. During operation, the compressor motor will rotate in the opposite direction to change the direction of refrigerant flow. a. True b. False ANSWER: False POINTS: 1 REFERENCES: Refrigerant Line Identification QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 3/12/2015 12:23 PM 11. TXVs used in cooling-only air-conditioning units and heat pumps are interchangeable as long as they are the same size and for the same refrigerant. a. True b. False ANSWER: False POINTS: 1 REFERENCES: Thermostatic Expansion Valves QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:42 PM 12. In the emergency heat mode, the auxiliary heat source becomes the primary heat source because of heat pump failure. a. True b. False ANSWER: True POINTS: 1 REFERENCES: Controls for the Air-to-Air Heat Pump QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:44 PM 13. It is common for the outdoor unit to ice-up when the heat pump is operated in the cooling mode. a. True b. False ANSWER: False POINTS: 1 REFERENCES: The Defrost Cycle QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 3/12/2015 12:23 PM 14. When a compressor is changed, the four-way valve also must be changed. a. True b. False ANSWER: False POINTS: 1 REFERENCES: Troubleshooting the Compressor QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 3/12/2015 12:23 PM 15. The water-to-air heat pump might not need auxiliary heat because the water can be at relatively constant temperature all winter. a. True b. False ANSWER: True POINTS: 1 REFERENCES: Coefficient of Performance QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:47 PM 16. The term ____________________ indicates the source of heat while the system is operating in the heating mode and the medium that is ultimately being treated. ANSWER: air-to-air air to air POINTS: 1 REFERENCES: Heat Sources for Winter QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:47 PM 17. The ____________________ is a four-port valve that has a slide mechanism in it. ANSWER: four-way reversing valve four way reversing valve POINTS: 1 REFERENCES: The Four-Way Reversing Valve QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:48 PM 18. The coil of the air-to-air heat pump system that is the indoor unit is known as the ____________________ in the cooling mode. ANSWER: evaporator POINTS: 1 REFERENCES: The Air-to-Air Heat Pump QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:52 PM 19. The coil of the air-to-air heat pump system that is the indoor unit is known as the ____________________ in the heating mode. ANSWER: condenser POINTS: 1 REFERENCES: The Air-to-Air Heat Pump QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:52 PM 20. The coil that serves the inside of the house in a heat pump is known as the ____________________. ANSWER: indoor coil POINTS: 1 REFERENCES: The Air-to-Air Heat Pump QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 3/12/2015 12:23 PM 21. In heat pump systems the sensing bulb is typically exposed to high temperatures and could rupture the valve diaphragm. For this reason, a(n) ____________________ TVX is usually used. ANSWER: vapor-charged vapor charged POINTS: 1 REFERENCES: Thermostatic Expansion Valves QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 7:26 PM 22. A(n) ____________________ thermostatic expansion valve has a check valve built into the body of the TXV. ANSWER: bi-directional bidirectional POINTS: 1 REFERENCES: Thermostatic Expansion Valves QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 3/12/2015 12:23 PM 23. Some heat pump systems when not capable of meeting the heating needs of the structure are equipped with second-stage heat, called ____________________. ANSWER: auxiliary heat POINTS: 1 REFERENCES: Auxiliary Heat QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 7:14 PM 24. Most heat pump systems are designed to operate in the heating mode when the solenoid is not energized. This is referred to as “____________________ in the heating mode”. ANSWER: failing POINTS: 1 REFERENCES: The Four-Way Reversing Valve QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:57 PM 25. The lowest outside air temperature at which the heat pump system can satisfy the heating needs of the structure without requiring auxiliary heat is called the ____________________. ANSWER: balance point POINTS: 1 REFERENCES: Balance Point QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:58 PM 26. The coefficient of performance of a heat pump operating in the heat mode tends to ____________________ as the outside air temperature drops. ANSWER: decrease POINTS: 1 REFERENCES: Coefficient of Performance QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 6:58 PM 27. A common metering device is a combination flow device and check valve. This device is referred to as a(n) ____________________. ANSWER: piston POINTS: 1 REFERENCES: Orifice Metering Devices QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 7:00 PM 28. When a heat pump is added to an electric furnace, the indoor coil must be located after the ____________________ strips. ANSWER: heat POINTS: 1 REFERENCES: The Indoor Unit QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 7:01 PM 29. In time-temperature defrost controls, the temperature that actuates the control is the temperature of the ____________________ coil. ANSWER: outdoor POINTS: 1 REFERENCES: The Defrost Cycle QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 7:02 PM 30. When oil or gas auxiliary heat is used with a heat pump, the heat pump indoor coil must be located ____________________ of the oil or gas heat exchanger. ANSWER: downstream POINTS: 1 REFERENCES: Special Applications for Heat Pumps QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 7:03 PM 31. ____________________ involves the removal of heat from a place where it is not wanted and depositing it in a place where it makes little or no difference. ANSWER: Refrigeration POINTS: 1 REFERENCES: Reverse-Cycle Refrigeration QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 3/12/2015 12:23 PM 32. What is it meant by the terminology “time or temperature terminated” defrost cycle? ANSWER: It means that either a temperature or a time condition can terminate defrost. POINTS: 1 REFERENCES: The Defrost Cycle QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 7:07 PM 33. What is the formula for the COP of a heat pump operating in the heating mode? ANSWER: COP = Total Heat of Rejection ÷ Heat of Compression POINTS: 1 REFERENCES: Coefficient of Performance QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 7:08 PM 34. What action must the four-way reversing valve take to operate the heat pump system in the defrost mode? ANSWER: It must switch the system into the cooling mode. POINTS: 1 REFERENCES: The Defrost Cycle QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 7:09 PM 35. Why must the air from a heat pump operating in the heating mode be distributed carefully? ANSWER: To avoid drafts since it is not as hot as the air form a gas or oil furnace. POINTS: 1 REFERENCES: Temperature of the Conditioned Air QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:23 PM DATE MODIFIED: 12/19/2015 7:10 PM 1. A solid material exerts a pressure or force ____. a. in all directions b. downward only c. outward and downward d. outward only ANSWER: b POINTS: 1 REFERENCES: Matter QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/19/2015 11:26 AM 2. A liquid material exerts a pressure or force ____. a. in all directions b. downward only c. outward and downward d. outward only ANSWER: c POINTS: 1 REFERENCES: Matter QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/19/2015 11:26 AM 3. A vapor material exerts a pressure or force ____. a. in all directions b. downward only c. outward and downward d. outward only ANSWER: a POINTS: 1 REFERENCES: Matter QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/19/2015 11:26 AM 4. If the temperature remains constant and the volume that a gas occupies increases, the pressure will ____. a. decrease b. increase c. remain the same d. cannot be determined from the information given ANSWER: a POINTS: 1 REFERENCES: Gas Laws QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 5. The volume of gas varies inversely with the absolute pressure, provided the temperature remains constant. This is called ____. a. Charles' Law b. Tom's Law c. Boyle's Law d. Dalton's Law ANSWER: c POINTS: 1 REFERENCES: Gas Laws QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/19/2015 11:27 AM 6. At a constant pressure, the volume of a gas varies as to the absolute temperature and at a constant volume the pressure of the gas varies directly with the absolute temperature. This is known as ____. a. Charles' Law b. Tom's Law c. Boyle's Law d. Dalton's Law ANSWER: a POINTS: 1 REFERENCES: Gas Laws QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/19/2015 11:28 AM 7. The total pressure of a confined mixture of gases is the sum of the pressures of each of the gases in the mixture. This is known as ____. a. Charles' Law b. Tom's Law c. Boyle's Law d. Dalton's Law ANSWER: d POINTS: 1 REFERENCES: Gas Laws QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/19/2015 11:28 AM 8. A helicopter is lifting an 800-pound unit at a rate of 200 feet per minute. How many horsepower of work energy is the helicopter using in the process? a. 3.863 hp. b. 4.517 hp. c. 4.848 hp. d. 5.209 hp. ANSWER: c POINTS: 1 REFERENCES: Power QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/19/2015 3:48 PM 9. The unit used to measure electrical power is the ____. a. volt b. ampere c. watt d. ohm ANSWER: c POINTS: 1 REFERENCES: Electrical Power QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/19/2015 11:30 AM 10. One watt of electrical energy is equal to ____. a. 3.1416 Btu/h b. 3.413 Btu/h c. 3.3416 Btu/h d. 3.3146 Btu/h ANSWER: b POINTS: 1 REFERENCES: Electrical Power QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/19/2015 11:31 AM 11. How many watts of electrical power are equal to 1 horsepower? a. 33000. b. 15000. c. 746. d. 660. ANSWER: c POINTS: 1 REFERENCES: Electrical Power QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/19/2015 3:49 PM 12. Specific volume is the term used to indicate the space a weight of gas will occupy. a. True b. False ANSWER: True POINTS: 1 REFERENCES: Specific Volume QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 13. As heat is applied to a closed container containing a gas, the pressure inside the container will decrease. a. True b. False ANSWER: False POINTS: 1 REFERENCES: Gas Laws QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 14. An example of a fossil fuel is hydrogen. a. True b. False ANSWER: False POINTS: 1 REFERENCES: Conservation of Energy QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 15. A law of conservation of energy states that energy is neither created nor destroyed. a. True b. False ANSWER: True POINTS: 1 REFERENCES: Conservation of Energy QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 16. Heat is a form of energy because of the motion of molecules. a. True b. False ANSWER: True POINTS: 1 REFERENCES: Energy Contained in Heat QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 17. A material that occupies space and has mass is called ____________________. ANSWER: matter POINTS: 1 REFERENCES: Matter QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 18. Matter exists in three states: ____________________, ____________________, and ____________________. ANSWER: solid, liquid, gas solid, gas, liquid gas, liquid, solid gas, solid, liquid liquid, gas, solid liquid, solid, gas POINTS: 1 REFERENCES: Matter QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/11/2015 6:52 PM 19. The law that states that "energy is neither created or destroyed, but can be converted from one form to another" is called the ____________________. ANSWER: law of conservation of energy POINTS: 1 REFERENCES: Conservation of Energy QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/21/2015 4:26 PM 20. Most of the energy we use comes from something we already have on Earth. The only "new" energy we get comes from the ____________________. ANSWER: sun POINTS: 1 REFERENCES: Conservation of Energy QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 21. ____________________ ft-lb of work is accomplished when an 800-lb condensing unit is lifted to the top of a 40-ft building. ANSWER: 32,000 32000 Thirty two thousand POINTS: 1 REFERENCES: Energy Used as Work QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/11/2015 6:53 PM 22. One horsepower of work energy equals the amount of work done when lifting ____________________ pounds to the height of ____________________ foot in ____________________ minute. ANSWER: 33,000, 1, 1 33000, 1, 1 Thirty three thousand, one, one POINTS: 1 REFERENCES: Power QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/11/2015 6:55 PM 23. The unit of measurement of electrical power is the ____________________. ANSWER: watt watt (W) POINTS: 1 REFERENCES: Electrical Power-The Watt QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/11/2015 6:59 PM 24. One pound of ice at 20°F exerts its force downward. After absorbing 200 Btus, what direction(s) will the force be exerted? After absorbing 2000 Btus? ANSWER: In the first case, force is exerted outward and downward; in the second, in all directions. POINTS: 1 REFERENCES: Matter QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 25. Define an atom. ANSWER: An atom is the smallest part of a material. POINTS: 1 REFERENCES: Matter QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 26. Define a molecule. ANSWER: A molecule consists of atoms and cannot be broken down further without changing the chemical composition of the substance. POINTS: 1 REFERENCES: Matter QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 27. Define density. ANSWER: The mass to volume relationship of a material. POINTS: 1 REFERENCES: Density QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 28. Define specific gravity. ANSWER: The ratio of the density of a cubic foot of a material as compared to a cubic foot of water in liquid form. POINTS: 1 REFERENCES: Specific Gravity QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 29. Define specific volume. ANSWER: The volume in cubic feet that a one pound quantity of vapor will occupy. POINTS: 1 REFERENCES: Specific Volume QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/11/2015 7:00 PM 30. Define power. ANSWER: The rate of doing work. POINTS: 1 REFERENCES: Power QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM Match the gas law with its properties. a. Boyle’s law b. Charles' law c. Dalton's law REFERENCES: Gas Laws QUESTION TYPE: Matching HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/11/2015 7:02 PM 31. V1 / T1 = V2 / T2 ANSWER: b POINTS: 1 32. PTOTAL = PSUBSTANCE 1 + PSUBSTANCE 2 ANSWER: c POINTS: 1 33. P1 × V1 = P2 × V2 ANSWER: a POINTS: 1 Match the following terms with their proper units and/or formulas. a. Specific volume b. hp c. Specific gravity d. Density e. 1 kW f. Work REFERENCES: Energy Used as Work Electrical Power-The Watt Specific Volume Specific Gravity Power Density QUESTION TYPE: Matching HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 12/11/2015 7:06 PM 34. Force × Distance ANSWER: f POINTS: 1 35. 3413 Btu/h ANSWER: e POINTS: 1 36. ft3/lb ANSWER: a POINTS: 1 37. No units ANSWER: c POINTS: 1 38. 33,000 ft-lb/min ANSWER: b POINTS: 1 39. lb/ft3 ANSWER: d POINTS: 1 1. Which of the following statements is correct when referring to large refrigerant or nitrogen tanks? a. The protective cap must be on when the tank is not in use. b. Safety goggles or glasses must be worn when moving the tank. c. Large tanks should not be carried, they should be secured to an approved cart. d. All of the above are correct. ANSWER: d POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 2. An example of a pressure vessel is ____. a. a small ship containing refrigerant cylinders b. the compressor in a refrigeration unit c. a cylinder containing refrigerant d. a portable dolly ANSWER: c POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM REFRIGERANT REFRIGERANT REFRIGERANT TEMP _____________________ TEMP ______________________ TEMP ________________________ °F 12 22 134a 502 °F 12 22 134a 502 °F 12 22 134a 502 –60 19.0 12.0 7.2 12 15.8 34.7 13.2 43.2 42 38.8 71.4 37.0 83.8 –55 17.3 9.2 3.8 13 16.4 35.7 13.8 44.3 43 39.8 73.0 38.0 85.4 –50 15.4 6.2 0.2 14 17.1 36.7 14.4 45.4 44 40.7 74.5 39.0 87.0 –45 13.3 2.7 1.9 15 17.7 37.7 15.1 46.5 45 41.7 76.0 40.1 88.7 –40 11.0 0.5 14.7 4.1 16 18.4 38.7 15.7 47.7 46 42.6 77.6 41.1 90.4 –35 8.4 2.6 12.4 6.5 17 19.0 39.8 16.4 48.8 47 43.6 79.2 42.2 92.1 –30 5.5 4.9 9.7 9.2 18 19.7 40.8 17.1 50.0 48 44.6 80.8 43.3 93.9 –25 2.3 7.4 6.8 12.1 19 20.4 41.9 17.7 51.2 49 45.7 82.4 44.4 95.6 –20 0.6 10.1 3.6 15.3 20 21.0 43.0 18.4 52.4 50 46.7 84.0 45.5 97.4 –18 1.3 11.3 2.2 16.7 21 21.7 44.1 19.2 53.7 55 52.0 92.6 51.3 106.6 –16 2.0 12.5 0.7 18.1 22 22.4 45.3 19.9 54.9 60 57.7 101.6 57.3 116.4 –14 2.8 13.8 0.3 19.5 23 23.2 46.4 20.6 56.2 65 63.8 111.2 64.1 126.7 –12 3.6 15.1 1.2 21.0 24 23.9 47.6 21.4 57.5 70 70.2 121.4 71.2 137.6 –10 4.5 16.5 2.0 22.6 25 24.6 48.8 22.0 58.8 75 77.0 132.2 78.7 149.1 –8 5.4 17.9 2.8 24.2 26 25.4 49.9 22.9 60.1 80 84.2 143.6 86.8 161.2 –6 6.3 19.3 3.7 25.8 27 26.1 51.2 23.7 61.5 85 91.8 155.7 95.3 174.0 –4 7.2 20.8 4.6 27.5 28 26.9 52.4 24.5 62.8 90 99.8 168.4 104.4 187.4 –2 8.2 22.4 5.5 29.3 29 27.7 53.6 25.3 64.2 95 108.2 181.8 114.0 201.4 0 9.2 24.0 6.5 31.1 30 28.4 54.9 26.1 65.6 100 117.2 195.9 124.2 216.2 1 9.7 24.8 7.0 32.0 31 29.2 56.2 26.9 67.0 105 126.6 210.8 135.0 231.7 2 10.2 25.6 7.5 32.9 32 30.1 57.5 27.8 68.4 110 136.4 226.4 146.4 247.9 3 10.7 26.4 8.0 33.9 33 30.9 58.8 28.7 69.9 115 146.8 242.7 158.5 264.9 4 11.2 27.3 8.6 34.9 34 31.7 60.1 29.5 71.3 120 157.6 259.9 171.2 282.7 5 11.8 28.2 9.1 35.8 35 32.6 61.5 30.4 72.8 125 169.1 277.9 184.6 301.4 6 12.3 29.1 9.7 36.8 36 33.4 62.8 31.3 74.3 130 181.0 296.8 198.7 320.8 7 12.9 30.0 10.2 37.9 37 34.3 64.2 32.2 75.8 135 193.5 316.6 213.5 341.2 8 13.5 30.9 10.8 38.9 38 35.2 65.6 33.2 77.4 140 206.6 337.2 229.1 362.6 9 14.0 31.8 11.4 39.9 39 36.1 67.1 34.1 79.0 145 220.3 358.9 245.5 385.0 10 14.6 32.8 11.9 41.0 40 37.0 68.5 35.1 80.5 150 234.6 381.5 262.7 408.4 11 15.2 33.7 12.5 42.1 41 37.9 70.0 36.0 82.1 155 249.5 405.1 280.7 432.9 3. An R-22 cylinder containing enough refrigerant to have liquid refrigerant in it, is in a truck with a temperature of 120°F. What would be the psig pressure in the cylinder? a. 255.7 psig b. 259.9 psig c. 267.0 psig d. 271.5 psig ANSWER: b POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: Multiple Choice HAS VARIABLES: False PREFACE NAME: Figure 4-1 DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 4. A cylinder with 1,500 sq. in. of internal surface contains R-22 and is in a service truck body at 120°F. What is the total outward force of the refrigerant against the inner wall of the cylinder in tons of pressure? a. 202.64 b. 226.61 c. 194.92 d. 145.71 ANSWER: c POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: Multiple Choice HAS VARIABLES: False PREFACE NAME: Figure 4-1 DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 5. A fusible plug is a metal fitting that has a hole drilled through it and the hole is filled with ____. a. material with a low melting point b. plastic c. copper fused with brass d. a metal alloy that will burn when overheated ANSWER: a POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 6. When transferring refrigerants from a cylinder to a refrigeration system or any other container, you should always wear ____. a. goggles with side shields and gloves b. heavy protective clothing c. rubber gloves d. industrial steel-toed shoes and an insulated cap ANSWER: a POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 7. When it is necessary to perform electrical work in an area that has a damp or wet floor, which of the following can be done to minimize the chance of electrical shock? a. Place a rubber mat on the floor. b. Use a wooden ladder. c. Wear insulated boots and gloves. d. All of the above ANSWER: d POINTS: 1 REFERENCES: Electrical Hazards QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 8. Electrical power should always be shut off at the _____ or entrance panel and locked out in an approved manner when installing equipment. a. equipment b. local c. distribution d. remote ANSWER: c POINTS: 1 REFERENCES: Electrical Hazards QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 9. A double insulated drill ____. a. has two ground wires to insure proper grounding b. generally has a plastic case with the electrical connections and motor insulated within the tool c. is used with a three- to two-prong adapter d. has rechargeable batteries ANSWER: b POINTS: 1 REFERENCES: Electrical Hazards QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 10. In electrical circuits, the _____ wire protects the operator. a. live b. control c. grounding d. neutral ANSWER: c POINTS: 1 REFERENCES: Electrical Hazards QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 11. Fires that involve ordinary materials such as paper, cardboard, and wood are classified as Type __________ fires. a. A b. B c. C d. D ANSWER: a POINTS: 1 REFERENCES: Heat QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 12. Fires that involve ordinary materials such as oil and gas are classified as Type __________ fires. a. A b. B c. C d. D ANSWER: b POINTS: 1 REFERENCES: Heat QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 13. Fires that involve electrical equipment are classified as Type _____ fires. a. A b. B c. C d. D ANSWER: c POINTS: 1 REFERENCES: Heat QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 14. Fire extinguishers that can be used on any type of fire, A, B, or C generally contain a _____ to extinguish the fire. a. water b. carbon dioxide c. nitrogen d. dry chemical powder ANSWER: d POINTS: 1 REFERENCES: Heat QUESTION TYPE: Multiple Choice HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 15. When working in a machine room, safety glasses should not be worn because they can fog up and impede your eyesight. a. True b. False ANSWER: False POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 16. It is possible that your hand would suffer frostbite if it comes in contact with liquid R-22 when accidentally releasing refrigerant into the atmosphere (an illegal procedure). a. True b. False ANSWER: True POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 17. As long as the torch is kept moving below the level of the liquid refrigerant in the cylinder so as not to create a hotspot, it is OK to heat the cylinder in this manner. a. True b. False ANSWER: False POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 18. To insure proper operation of an oxygen cylinder regulator, make sure no oil residue is present. a. True b. False ANSWER: True POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 19. Aluminum ladders are safe to use around electrical equipment as long as they have insulation pads on the bottom of the rungs. a. True b. False ANSWER: False POINTS: 1 REFERENCES: Electrical Hazards QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 20. A necessary safety practice for a technician is to lockout the panel with a padlock and keep the key with you. a. True b. False ANSWER: True POINTS: 1 REFERENCES: Electrical Hazards QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 21. If you are a refrigeration technician, a warm coat and gloves should be in your truck, even in the middle of the summer. a. True b. False ANSWER: True POINTS: 1 REFERENCES: Cold QUESTION TYPE: True / False HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 22. Oil must never be used around a(n) ____________________ cylinder. ANSWER: oxygen POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 23. Power tools that are not double insulated must have three-prong plugs to ensure that the tool is properly ____________________. ANSWER: grounded POINTS: 1 REFERENCES: Electrical Hazards QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 24. A way to move equipment across a roof is to use rollers and ____________________ for a base. ANSWER: plywood POINTS: 1 REFERENCES: Moving Heavy Objects QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 25. Refrigerants from a refrigeration system that has a burned out motor-compressor assembly can be dangerous because it could contain a high concentration of ____________________. ANSWER: acid POINTS: 1 REFERENCES: Using Chemicals QUESTION TYPE: Completion HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 26. If a large pressurized tank falls over and the stem breaks off, why shouldn't you try to stand up the tank? ANSWER: The tank may become a projectile that can cause serious injury. POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 27. Why is a regulator required on a nitrogen cylinder? ANSWER: This is required to reduce the high pressure in the cylinder to a lower, safer pressure. POINTS: 1 REFERENCES: Pressure Vessels and Piping QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 28. Why should a technician not wear jewelry and metallic watches while working on a system? ANSWER: The metal conducts electricity and is potentially dangerous, causing shock and/or burns. POINTS: 1 REFERENCES: Electrical Hazards QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 29. When turning off the electrical power at a disconnect panel to work on an electrical circuit, what should you do to ensure that no one will turn the power on until you have finished and are ready? ANSWER: Lock the panel with a lock that has one key and keep this key on your person. POINTS: 1 REFERENCES: Electrical Hazards QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 30. Why should a ground fault interrupter be used with portable electric tools? ANSWER: They protect against possible shock by opening when detecting a small current flow. POINTS: 1 REFERENCES: Electrical Hazards QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM 31. What safety precaution is required before starting an electric motor? ANSWER: Stand to one side of the motor so as not to be hit if parts fly off. POINTS: 1 REFERENCES: Mechanical Equipment QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False DATE CREATED: 3/12/2015 12:21 PM DATE MODIFIED: 3/12/2015 12:21 PM Keyword Tool Pro provides search volume data for English keywords, refrigeration and air conditioning test questions, refrigeration and air conditioning technology quizlet, hvac refrigeration test, refrigeration and air conditioning technology, hvac freon test, j tech air conditioning, j & t refrigeration, air conditioning and refrigeration technology, refrigeration and air conditioning technology answer key, p tech air conditioning system, air conditioning test questions and answers, refrigeration and air conditioning technology review question answers, vrf tech, refrigeration and air conditioning technology unit 3 review questions, refrigeration and air conditioning technology unit 36 review questions, refrigeration and air conditioning technology unit 4 review questions, refrigeration and air conditioning technology 6th edition, refrigeration and air conditioning technology 6th edition pdf, refrigeration and air conditioning technology unit 8 review questions, refrigeration and air conditioning technology 8th edition answer key, refrigeration and air conditioning technology 8th edition, refrigeration and air conditioning technology 8th edition answer key pdf, refrigeration and air conditioning technology 9th edition answers, refrigeration and air conditioning technology 9th edition, refrigeration and air conditioning technology 9th edition answer key.