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Test Bank For Modern Refrigeration and Air Conditioning 21st Edition by Andrew D. Althouse, Carl H. Turnquist, Alfred F. Bracciano, Daniel C. Bracciano, Gloria M. Bracciano 9781635638776 Chapter 1-55 Complete Guide. $18.99
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Test Bank For Modern Refrigeration and Air Conditioning 21st Edition by Andrew D. Althouse, Carl H. Turnquist, Alfred F. Bracciano, Daniel C. Bracciano, Gloria M. Bracciano 9781635638776 Chapter 1-55 Complete Guide.
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Test Bank For Modern Refrigeration and Air Conditioning 21st Edition by Andrew D. Althouse, Carl H. Turnquist, Alfred F. Bracciano, Daniel C. Bracciano, Gloria M. Bracciano 9781635638776 Chapter 1-55 Complete Guide.

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  • October 10, 2024
  • 52
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • modern refrigeration and air conditioning 21st edi

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  • Modern Refrigeration and Air Conditioning 21st Edi
  • Modern Refrigeration and Air Conditioning 21st Edi

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Test Bank For Modern Refrigeration
and Air Conditioning




1. Which component is primarily responsible for compressing refrigerant in a
refrigeration cycle?


A. Evaporator
B. Compressor
C. Condenser
D. Expansion valve


Answer: B. Compressor

,Rationale: The compressor increases the pressure of the refrigerant, allowing it to
circulate through the system.


2. In an air conditioning system, what is the function of the evaporator?


A. To compress the refrigerant
B. To release heat from the refrigerant
C. To absorb heat from the surrounding air
D. To regulate refrigerant flow


Answer: C. To absorb heat from the surrounding air
Rationale: The evaporator absorbs heat from the air, cooling it as the refrigerant
evaporates.


3. What type of refrigerant is being phased out due to environmental concerns
related to ozone depletion?


A. R-134a
B. R-22
C. R-410A
D. R-1234yf


Answer: B. R-22
Rationale: R-22, a hydrochlorofluorocarbon (HCFC), is being phased out because it
contributes to ozone depletion.


4. What is the primary purpose of the condenser in a refrigeration system?


A. To cool the refrigerant by absorbing heat
B. To raise the refrigerant’s temperature
C. To condense the refrigerant vapor into a liquid
D. To control refrigerant pressure

,Answer: C. To condense the refrigerant vapor into a liquid
Rationale: The condenser releases heat from the refrigerant, causing it to condense
into a liquid.


5. What is superheat in a refrigeration system?


A. The temperature of the refrigerant after it has fully evaporated
B. The temperature difference between the refrigerant entering and leaving the
condenser
C. The increase in refrigerant temperature after it leaves the compressor
D. The amount of heat absorbed by the refrigerant in the evaporator


Answer: A. The temperature of the refrigerant after it has fully evaporated
Rationale: Superheat is the temperature of the vapor refrigerant above its saturation
temperature after it has fully evaporated.


6. Which refrigerant is known for being environmentally friendly with low global
warming potential (GWP)?


A. R-134a
B. R-22
C. R-410A
D. R-1234yf


Answer: D. R-1234yf
Rationale: R-1234yf is widely used due to its low GWP and environmental benefits
compared to older refrigerants.


7. What type of oil is generally used with HFC refrigerants?


A. Mineral oil

, B. Alkylbenzene oil
C. Polyolester oil
D. PAG oil


Answer: C. Polyolester oil
Rationale: Polyolester oils are compatible with HFC refrigerants, offering good
miscibility and stability.


8. The efficiency of a refrigeration system is often measured by which of the
following?


A. Superheat
B. Subcooling
C. Coefficient of Performance (COP)
D. Refrigerant charge


Answer: C. Coefficient of Performance (COP)
Rationale: COP is a measure of a system's efficiency, representing the ratio of cooling
or heating provided to the energy consumed.9. What is the purpose of the
expansion valve in a refrigeration system?


A. To increase refrigerant pressure
B. To convert liquid refrigerant into vapor
C. To reduce refrigerant pressure and temperature
D. To circulate refrigerant through the system


Answer: C. To reduce refrigerant pressure and temperature
Rationale: The expansion valve reduces the pressure and temperature of the
refrigerant, allowing it to evaporate in the evaporator and absorb heat.


10. Which component of the refrigeration cycle is responsible for rejecting heat to
the surrounding environment?

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