CDC 3E151 HVAC/R AIR FORCE VOL 5 |ACTUAL
QUESTIONS AND VERIFIED ANSWERS|BRAND NEW
2026-2027 UPDATE|GRADED A+
Question 1
How much sensible heat is added if the temperature of air increases from 70 to 80 F?
CORRECT ANSWER
10 F
Question 2
What occurs during the latent heat of condensation
CORRECT ANSWER
Vapor turns to a liquid.
Question 3
What determines the pressure required to achieve a specific flow rate?
CORRECT ANSWER
Design of the piping system.
Question 4
What three processes take place in the condenser
CORRECT ANSWER
Desuperheating, condensing, and subcooling.
1
,Question 5
The heat being absorbed in the evaporator comes from the
CORRECT ANSWER
Product being cooled or the conditioned space.
Question 6
What happens to the exhaust valve of a compressor during the intake stroke
CORRECT ANSWER
Backpressure from the high side closes it.
Question 7
What effect do find on the shell of a compressor have
CORRECT ANSWER
Increase surface area and allow more heat transfer with ambient air
Question 8
What does a check valve in the discharge line prevent with a rotary compressor
CORRECT ANSWER
Gas from leaking back to compressor.
Question 9
Why must you be careful when placing meter leads on compressor terminals
2
, CORRECT ANSWER
This is the weakest section of the compressor and a blowout could occur
Question 10
What is the result of a loose electrical connection at the compressor terminal
CORRECT ANSWER
Increased heat
Question 11
Where are internal motor protection devices embedded
CORRECT ANSWER
In or near motor windings
Question 12
Desuperheating generally takes place in the
CORRECT ANSWER
Discharge line and first few coils of the condenser
Question 13
Non condensables inside a refrigeration system are in what form
CORRECT ANSWER
Gas
3
QUESTIONS AND VERIFIED ANSWERS|BRAND NEW
2026-2027 UPDATE|GRADED A+
Question 1
How much sensible heat is added if the temperature of air increases from 70 to 80 F?
CORRECT ANSWER
10 F
Question 2
What occurs during the latent heat of condensation
CORRECT ANSWER
Vapor turns to a liquid.
Question 3
What determines the pressure required to achieve a specific flow rate?
CORRECT ANSWER
Design of the piping system.
Question 4
What three processes take place in the condenser
CORRECT ANSWER
Desuperheating, condensing, and subcooling.
1
,Question 5
The heat being absorbed in the evaporator comes from the
CORRECT ANSWER
Product being cooled or the conditioned space.
Question 6
What happens to the exhaust valve of a compressor during the intake stroke
CORRECT ANSWER
Backpressure from the high side closes it.
Question 7
What effect do find on the shell of a compressor have
CORRECT ANSWER
Increase surface area and allow more heat transfer with ambient air
Question 8
What does a check valve in the discharge line prevent with a rotary compressor
CORRECT ANSWER
Gas from leaking back to compressor.
Question 9
Why must you be careful when placing meter leads on compressor terminals
2
, CORRECT ANSWER
This is the weakest section of the compressor and a blowout could occur
Question 10
What is the result of a loose electrical connection at the compressor terminal
CORRECT ANSWER
Increased heat
Question 11
Where are internal motor protection devices embedded
CORRECT ANSWER
In or near motor windings
Question 12
Desuperheating generally takes place in the
CORRECT ANSWER
Discharge line and first few coils of the condenser
Question 13
Non condensables inside a refrigeration system are in what form
CORRECT ANSWER
Gas
3
