ESCO Heat Pump Exam Questions and
Answers
Question 1
On duel fuel systems, the indoor coil must be located;
Correct Answer
B: after the heat exchanger.
Question 2
How may a lockout (impedance) relay be reset?
Correct Answer
C: Simply disconnect power to the unit momentarily.
Question 3
Since electric resistance heat provides 1 watt of usable heat for each watt of energy
purchased, electric resistance heat has a COP of;
Correct Answer
A: 1 : 1
Question 4
During the heating mode, the refrigerant in the indoor coil is under;
Correct Answer
B: high pressure
Question 5
Movement of the piston in the reversing valve is accomplished by;
Correct Answer
C: bleeding pressure from one side of the piston to the suction side of the
compressor
Page 1 of 20
,Question 6
On most air-to-air heat pumps;
Correct Answer
D: airflow must be reduced over the indoor coil during the heat mode.
Question 7
What three things happen on most air-to-air heat pumps during defrost?
Correct Answer
C: The reversing valve must switch to cooling mode, the outdoor fan shuts off and
auxiliary heat is energized.
Question 8
During the defrost cycle, the outdoor fan is usually;
Correct Answer
C: turned off
Question 9
When a heat pump is operating in the cooling mode, the;
Correct Answer
C: indoor metering device is metering refrigerant and the outdoor check valve is
open.
Question 10
When a heat pump is operating in the heat mode, the suction line at the compressor
will feel;
Correct Answer
D: Both cold and sweaty
Page 2 of 20
, Question 11
The slide valve and piston in the reversing valve is actuated by pressure directed
through the;
Correct Answer
A: solenoid and pilot valve.
Question 12
How is defrost terminated in this system?
Correct Answer
D. either time or temperature termination requirements must be satisfied
Question 13
You answer a service call for insufficient heat. You find the suction pressure is higher
and discharge pressure is lower than normal. Using a digital thermometer, you
measure the line entering the reversing valve from the compressor discharge and find
215F You then measure the line leaving the reversing valve that connects to the
indoor coil and find 185F. These readings are an indication of;
Correct Answer
B: a faulty reversing valve.
Question 14
What is the recommended CFM across the evaporator coil of a heat pump?
Correct Answer
B: 400 to 450 CFM.
Question 15
To make the reversing valve slide move, the system must have a pressure difference
of;
Correct Answer
C: 75 to 100 psig.
Page 3 of 20
Answers
Question 1
On duel fuel systems, the indoor coil must be located;
Correct Answer
B: after the heat exchanger.
Question 2
How may a lockout (impedance) relay be reset?
Correct Answer
C: Simply disconnect power to the unit momentarily.
Question 3
Since electric resistance heat provides 1 watt of usable heat for each watt of energy
purchased, electric resistance heat has a COP of;
Correct Answer
A: 1 : 1
Question 4
During the heating mode, the refrigerant in the indoor coil is under;
Correct Answer
B: high pressure
Question 5
Movement of the piston in the reversing valve is accomplished by;
Correct Answer
C: bleeding pressure from one side of the piston to the suction side of the
compressor
Page 1 of 20
,Question 6
On most air-to-air heat pumps;
Correct Answer
D: airflow must be reduced over the indoor coil during the heat mode.
Question 7
What three things happen on most air-to-air heat pumps during defrost?
Correct Answer
C: The reversing valve must switch to cooling mode, the outdoor fan shuts off and
auxiliary heat is energized.
Question 8
During the defrost cycle, the outdoor fan is usually;
Correct Answer
C: turned off
Question 9
When a heat pump is operating in the cooling mode, the;
Correct Answer
C: indoor metering device is metering refrigerant and the outdoor check valve is
open.
Question 10
When a heat pump is operating in the heat mode, the suction line at the compressor
will feel;
Correct Answer
D: Both cold and sweaty
Page 2 of 20
, Question 11
The slide valve and piston in the reversing valve is actuated by pressure directed
through the;
Correct Answer
A: solenoid and pilot valve.
Question 12
How is defrost terminated in this system?
Correct Answer
D. either time or temperature termination requirements must be satisfied
Question 13
You answer a service call for insufficient heat. You find the suction pressure is higher
and discharge pressure is lower than normal. Using a digital thermometer, you
measure the line entering the reversing valve from the compressor discharge and find
215F You then measure the line leaving the reversing valve that connects to the
indoor coil and find 185F. These readings are an indication of;
Correct Answer
B: a faulty reversing valve.
Question 14
What is the recommended CFM across the evaporator coil of a heat pump?
Correct Answer
B: 400 to 450 CFM.
Question 15
To make the reversing valve slide move, the system must have a pressure difference
of;
Correct Answer
C: 75 to 100 psig.
Page 3 of 20
