Refrigeration Operator
Study online at https://quizlet.com/_hyecic
1. What is energy?: the capacity of a body to do work
2. What is velocity?: Rate of change of your position
3. What is acceleration?: the rate of change of velocity
4. What is compression ratio?: Discharge divided by suction
5. What is Mass?: the quantity of matter that a body contains
6. What is force?: Any action on a body who tends to change:
Size, Shape or State
7. What is kenetic energy?: The ability of a body to do work due to its motion
8. What is potential energy?: the ability of a body to do work by virtue of its position
9. Welding: the joining of two or more pieced of metal by the application of heat and sometimes pressure
10. Arc welding: the process of fusion is obtained by heating with an electric arc(s)
11. Braze welding: a form of fusion welding where the base metal is not fused but is heated bu an oxyacetylene
torch
12. What is an oxidizing agent?: A chemical substance that can supply to react with hydrogent or with
metals
13. What is a reducing agent?: fuels in the combustion process where they combine with an oxidizing
agent
14. temperature: a measure of the molecular activity occurring within a substance
15. the four class letters, shapes and colour code of a fire extinguisher: Green triangle
- A - ordinary combustibles
Red Square - B - Flammable Liquids
Blue Circle - C - Electrical
Yellow Star - D - combustible metals
16. The 7 most important physical elements of a refrigerant: Density
Odour
leakage tendency
Miscibility
Moisture Reaction
Flammability
Toxicity
17. The 6 types of pipe joints: Soldered
Screwed
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, Refrigeration Operator
Study online at https://quizlet.com/_hyecic
Flanged
Flared
Brazed
Welded
18. the 7 units of measurements on a psychometric chart: Dry bulb temperature
Wet bulb temperature
Relative humidity
Specific Humidity
Dew-point
Specific volume
enthalpy
19. 5 accessories air handling units are equipped with: Fan
Filters
Humidifier
heating and cooling
motorized dampers
20. 4 methods of heat recovery in an air conditioning unit: Heat pipe
Heat pump
Thermal Wheel
Runaround system
21. Convection: When heat is transmitted by hot gasses
22. Superheated: When saturated vapour is given additional heat, raising it above temperature of saturation
23. conduction: When heat is exchanged by travelling through metal
24. high pressure limit: the switch that prevents a compressor from reaching too high discharge pressure
25. specific heat: the change in length per unit length per degree rise in temperature
26. relative humidity: the percentage of moisture contained in the air compared to the maximum amount
moisture the air is capable of holding at the stated temperature
27. wet bulb depression: the difference between the wet bulb and dry bulb reading
28. Psychrometer: An instrument used to measure relative humidity
29. Open Compressor: The type of compressor that uses V-Belts to drive the compressor and must have a
special shaft seal
30. Hermetic Compressor: The type of reciprocating compressor used on low capacity appliances
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Study online at https://quizlet.com/_hyecic
1. What is energy?: the capacity of a body to do work
2. What is velocity?: Rate of change of your position
3. What is acceleration?: the rate of change of velocity
4. What is compression ratio?: Discharge divided by suction
5. What is Mass?: the quantity of matter that a body contains
6. What is force?: Any action on a body who tends to change:
Size, Shape or State
7. What is kenetic energy?: The ability of a body to do work due to its motion
8. What is potential energy?: the ability of a body to do work by virtue of its position
9. Welding: the joining of two or more pieced of metal by the application of heat and sometimes pressure
10. Arc welding: the process of fusion is obtained by heating with an electric arc(s)
11. Braze welding: a form of fusion welding where the base metal is not fused but is heated bu an oxyacetylene
torch
12. What is an oxidizing agent?: A chemical substance that can supply to react with hydrogent or with
metals
13. What is a reducing agent?: fuels in the combustion process where they combine with an oxidizing
agent
14. temperature: a measure of the molecular activity occurring within a substance
15. the four class letters, shapes and colour code of a fire extinguisher: Green triangle
- A - ordinary combustibles
Red Square - B - Flammable Liquids
Blue Circle - C - Electrical
Yellow Star - D - combustible metals
16. The 7 most important physical elements of a refrigerant: Density
Odour
leakage tendency
Miscibility
Moisture Reaction
Flammability
Toxicity
17. The 6 types of pipe joints: Soldered
Screwed
1/6
, Refrigeration Operator
Study online at https://quizlet.com/_hyecic
Flanged
Flared
Brazed
Welded
18. the 7 units of measurements on a psychometric chart: Dry bulb temperature
Wet bulb temperature
Relative humidity
Specific Humidity
Dew-point
Specific volume
enthalpy
19. 5 accessories air handling units are equipped with: Fan
Filters
Humidifier
heating and cooling
motorized dampers
20. 4 methods of heat recovery in an air conditioning unit: Heat pipe
Heat pump
Thermal Wheel
Runaround system
21. Convection: When heat is transmitted by hot gasses
22. Superheated: When saturated vapour is given additional heat, raising it above temperature of saturation
23. conduction: When heat is exchanged by travelling through metal
24. high pressure limit: the switch that prevents a compressor from reaching too high discharge pressure
25. specific heat: the change in length per unit length per degree rise in temperature
26. relative humidity: the percentage of moisture contained in the air compared to the maximum amount
moisture the air is capable of holding at the stated temperature
27. wet bulb depression: the difference between the wet bulb and dry bulb reading
28. Psychrometer: An instrument used to measure relative humidity
29. Open Compressor: The type of compressor that uses V-Belts to drive the compressor and must have a
special shaft seal
30. Hermetic Compressor: The type of reciprocating compressor used on low capacity appliances
2/6
