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Test your basic knowledge |
Air Conditioning Basics
Start Test
Study First
Subjects
:
industries
,
engineering
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Outdoor air cooled
Water is sprayed on it to cool it
Coil of water tubing inside the shell rather than a straight tube
Condenser placed outside building
Frosting - Defrosting - Non frosting
2. What is the function of a check valve?
Water - a beverage - or brine
To prevent flow of refrigerant in the wrong direction.
Frosting - Defrosting - Non frosting
Coil of water tubing inside the shell rather than a straight tube
3. List 2 basic types of motor controls used in commercial refrigeration
Water passing through inside tube cools refrigerant in outer tube
Temps above 32F
Thermostatic and Pressure control
Low temp and Frozen Foods
4. Shell and tube
Auger
Temps above 32F
Compact - needs no fans - and combines the condenser and receiver into one.
Need to remove frost
5. __ are used to minimize noise during compressor operations
Desiccant chemical
Condenser placed outside building
Desiccant chemical
Mufflers
6. In a hot gas defrost system - which parts of the system are heated?
To prevent flow of refrigerant in the wrong direction.
Condenser and evaporator
Compact - needs no fans - and combines the condenser and receiver into one.
High Pressure and Oil Pressure
7. To eliminate uncertain pressure fluctuations - a ___ is used.
Desiccant chemical
Water passing through inside tube cools refrigerant in outer tube
Need to remove frost
Surge Tank
8. Tube-within-a-tube
Frosting - Defrosting - Non frosting
Water passing through inside tube cools refrigerant in outer tube
Compact - needs no fans - and combines the condenser and receiver into one.
Auger
9. A device used to show a system is low on refrigerant is called a __. This sympton would indicate __ in this device.
Water - a beverage - or brine
Suction and liquid lines
Sightglass - low refrigerant caused by bubbles in sightglass
Compact - needs no fans - and combines the condenser and receiver into one.
10. List 2 safety cutouts not used in domestic controls
High Pressure and Oil Pressure
Coil of water tubing inside the shell rather than a straight tube
Coil of water tubing inside the shell rather than a straight tube
Condensor pressure acting on bellows.
11. Nonfrost
Condenser and evaporator
Temps above 32F
Copper and cast aluminum
Water - a beverage - or brine
12. What is commonly used to produce flake ice?
Condenser and evaporator
Frosting - Defrosting - Non frosting
Water is sprayed on it to cool it
Auger
13. What part of the metal is used in an all-metal pressure evaporator?
Copper and cast aluminum
Two temperature
Pressure operated and Temperature operated
Condensor pressure acting on bellows.
14. Evaporative condenser
Mufflers
Water is sprayed on it to cool it
Temps above 32F
Hermatic and external drive
15. List 2 basic types of motor controls used in commercial refrigeration
Temps above 32F
Water - a beverage - or brine
High Pressure and Oil Pressure
Thermostatic and Pressure control
16. What is commonly used to produce flake ice?
The condenser uses a counterflow fan
Auger
Sightglass - low refrigerant caused by bubbles in sightglass
Coil of water tubing inside the shell rather than a straight tube
17. List three uses for manual service valves.
Water is cooled more in the cross-flow due to the continuous blowing of cold air over the water.
Surge Tank
Determining operation pressures - Charge or Discharge system - Remove any part without disturbing other parts
Partially fill condenser with liquid refrig. -Slow condenser fans -Close ambient air louvers -Heat Condenser
18. What determines the opening or closing of the pressure-operated water regulating valve?
Determining operation pressures - Charge or Discharge system - Remove any part without disturbing other parts
Auger
Coil of water tubing inside the shell rather than a straight tube
Condensor pressure acting on bellows.
19. Immersed evaporators are surrounded by what?
Desiccant chemical
Water - a beverage - or brine
Partially fill condenser with liquid refrig. -Slow condenser fans -Close ambient air louvers -Heat Condenser
Condenser placed outside building
20. A device used to show a system is low on refrigerant is called a __. This sympton would indicate __ in this device.
Sightglass - low refrigerant caused by bubbles in sightglass
Determining operation pressures - Charge or Discharge system - Remove any part without disturbing other parts
Water is sprayed on it to cool it
Hermatic and external drive
21. To eliminate uncertain pressure fluctuations - a ___ is used.
Surge Tank
Copper and cast aluminum
Two temperature
Need to remove frost
22. Outdoor air cooled
Pressure operated and Temperature operated
Condensor pressure acting on bellows.
Condenser placed outside building
Water passing through inside tube cools refrigerant in outer tube
23. Identify heat exchanger inlets and outlets
Compact - needs no fans - and combines the condenser and receiver into one.
Thermostatic and Pressure control
Suction and liquid lines
Need to remove frost
24. __ are used to minimize noise during compressor operations
Low temp and Frozen Foods
Mufflers
Water passing through inside tube cools refrigerant in outer tube
Condenser and evaporator
25. List three uses for manual service valves.
Suction and liquid lines
Condensor pressure acting on bellows.
Determining operation pressures - Charge or Discharge system - Remove any part without disturbing other parts
Frosting - Defrosting - Non frosting
26. List 2 safety cutouts not used in domestic controls
Copper and cast aluminum
Low temp and Frozen Foods
High Pressure and Oil Pressure
The condenser uses a counterflow fan
27. A chemical used to eliminate moisture in a filter drier is known as a ___
Desiccant chemical
Partially fill condenser with liquid refrig. -Slow condenser fans -Close ambient air louvers -Heat Condenser
High Pressure and Oil Pressure
Compact - needs no fans - and combines the condenser and receiver into one.
28. Name two general Types of commercial compressors
To prevent flow of refrigerant in the wrong direction.
Water - a beverage - or brine
Desiccant chemical
Hermatic and external drive
29. Describe the difference in parallel and cross-Flow cooling towers
To prevent flow of refrigerant in the wrong direction.
Water is cooled more in the cross-flow due to the continuous blowing of cold air over the water.
Compact - needs no fans - and combines the condenser and receiver into one.
Water passing through inside tube cools refrigerant in outer tube
30. In a hot gas defrost system - which parts of the system are heated?
Pressure operated and Temperature operated
To prevent flow of refrigerant in the wrong direction.
Compact - needs no fans - and combines the condenser and receiver into one.
Condenser and evaporator
31. Defrost
Suction and liquid lines
Auger
Need to remove frost
Frosting - Defrosting - Non frosting
32. Tube-within-a-tube
Condenser and evaporator
Water is sprayed on it to cool it
Condenser placed outside building
Water passing through inside tube cools refrigerant in outer tube
33. Frosting
Compact - needs no fans - and combines the condenser and receiver into one.
Low temp and Frozen Foods
Compact - needs no fans - and combines the condenser and receiver into one.
Desiccant chemical
34. Identify two methods used to maintain proper head pressure in an outdoor air cooled condensing system
Water is sprayed on it to cool it
Partially fill condenser with liquid refrig. -Slow condenser fans -Close ambient air louvers -Heat Condenser
Auger
Surge Tank
35. Identify two methods used to maintain proper head pressure in an outdoor air cooled condensing system
Coil of water tubing inside the shell rather than a straight tube
High Pressure and Oil Pressure
The condenser uses a counterflow fan
Partially fill condenser with liquid refrig. -Slow condenser fans -Close ambient air louvers -Heat Condenser
36. What part of the metal is used in an all-metal pressure evaporator?
Auger
Frosting - Defrosting - Non frosting
Copper and cast aluminum
Hermatic and external drive
37. When Temp difference between evaporators in a system is large - a ___ valve is used
Two temperature
Hermatic and external drive
Compact - needs no fans - and combines the condenser and receiver into one.
Condenser placed outside building
38. Name two general Types of commercial compressors
Two temperature
Thermostatic and Pressure control
The condenser uses a counterflow fan
Hermatic and external drive
39. What determines the opening or closing of the pressure-operated water regulating valve?
Condensor pressure acting on bellows.
Mufflers
Low temp and Frozen Foods
Sightglass - low refrigerant caused by bubbles in sightglass
40. What is the function of a check valve?
Condensor pressure acting on bellows.
Thermostatic and Pressure control
Need to remove frost
To prevent flow of refrigerant in the wrong direction.
41. Identify heat exchanger inlets and outlets
Need to remove frost
Pressure operated and Temperature operated
Surge Tank
Suction and liquid lines
42. List two types of two-temperature valves
Thermostatic and Pressure control
Pressure operated and Temperature operated
Condenser and evaporator
Low temp and Frozen Foods
43. What is the counterflow principle
Water - a beverage - or brine
The condenser uses a counterflow fan
Hermatic and external drive
Pressure operated and Temperature operated
44. Immersed evaporators are surrounded by what?
Water - a beverage - or brine
Copper and cast aluminum
Determining operation pressures - Charge or Discharge system - Remove any part without disturbing other parts
Compact - needs no fans - and combines the condenser and receiver into one.
45. Shell and tube
Mufflers
Condenser placed outside building
Compact - needs no fans - and combines the condenser and receiver into one.
High Pressure and Oil Pressure
46. Evaporative condenser
Condenser and evaporator
Temps above 32F
Condenser placed outside building
Water is sprayed on it to cool it
47. List the three commonly used types of natural convection evaporators.
Frosting - Defrosting - Non frosting
Thermostatic and Pressure control
Temps above 32F
To prevent flow of refrigerant in the wrong direction.
48. When Temp difference between evaporators in a system is large - a ___ valve is used
Water is cooled more in the cross-flow due to the continuous blowing of cold air over the water.
Water - a beverage - or brine
Two temperature
Temps above 32F
49. List two types of two-temperature valves
Sightglass - low refrigerant caused by bubbles in sightglass
Water is cooled more in the cross-flow due to the continuous blowing of cold air over the water.
The condenser uses a counterflow fan
Pressure operated and Temperature operated
50. A chemical used to eliminate moisture in a filter drier is known as a ___
Desiccant chemical
Low temp and Frozen Foods
High Pressure and Oil Pressure
Water passing through inside tube cools refrigerant in outer tube