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