HEAT PUMP ESCO QUESTIONS WITH ACCURATE
ANSWERS
A customer complains that their heat pump systems blows cool air periodically
during the heat mode. This could be caused by; correct answer A faulty defrost
relay (does not energized the aux. heat during the defrost mode.)
A heat pump can be difficult to charge properly because; correct answer Heat
pumps can only be charged in the cooling mode.
A heat pump has a thermostatic expansion valve (TEV) and a check valve at each
coil. When the modes are reversed; correct answer Refrigerant will bypass the
TEV on the coil serving as the condenser.
A heat pump operates satisfactorily in the cooling mode, but not in the heat
mode. This could be caused by; correct answer A stuck check valve or clogged TXV
screen.
A heat pump system, operating at 45°F ambient, may be _______ efficient than
electric resistance heat correct answer 3 to 4 times more.
A high efficiency heat pump system designed to function from high to low
ambient conditions below 10*F, may have? correct answer Two outdoor coils
with each one incorporating a dual stage compressor.
A scroll type compressor; correct answer is less susceptible to damage from liquid
flood-back.
, Air-to-air heat pumps are most practical to operate in areas where the lowest
winter temperature does not go below ______ *F correct answer +10
Air-to-air heat pumps, operating without auxiliary heat, provide air to the
registers that is approximately _______ *F or less. correct answer 100
An air-to-air heat pump has many of the same components as an air conditioning
system. The major difference is that a heat pump also has an correct answer
Reversing valve
An R-410A heat pump operating in the cooling mode has a suction pressure of
131 PSIG. Adding 2 PSIG for pressure drop in the coil, the true outlet pressure is
131 PSIG. The temperature of the suction line at the outlet of the evaporator is
57° F. What is the superheat? correct answer 12 Degrees
An R410A heat pump operating in the heating mode has a suction pressure 50
PSIG and head pressure of 285 PSIG has a compression ratio of; correct answer
4.6:1
As outdoor ambient air temperature decreases, a heat pump's COP; correct
answer Decreases.
At temperatures above 45 degrees *F, the heat pump refrigeration cycle permits
the; correct answer Condenser to release 3 to 4 times more heat than it takes in
electrical energy to drive the compressor.
At what temperature is an outdoor ambient thermostat normally set? correct
answer Slightly above the initial balance point.
ANSWERS
A customer complains that their heat pump systems blows cool air periodically
during the heat mode. This could be caused by; correct answer A faulty defrost
relay (does not energized the aux. heat during the defrost mode.)
A heat pump can be difficult to charge properly because; correct answer Heat
pumps can only be charged in the cooling mode.
A heat pump has a thermostatic expansion valve (TEV) and a check valve at each
coil. When the modes are reversed; correct answer Refrigerant will bypass the
TEV on the coil serving as the condenser.
A heat pump operates satisfactorily in the cooling mode, but not in the heat
mode. This could be caused by; correct answer A stuck check valve or clogged TXV
screen.
A heat pump system, operating at 45°F ambient, may be _______ efficient than
electric resistance heat correct answer 3 to 4 times more.
A high efficiency heat pump system designed to function from high to low
ambient conditions below 10*F, may have? correct answer Two outdoor coils
with each one incorporating a dual stage compressor.
A scroll type compressor; correct answer is less susceptible to damage from liquid
flood-back.
, Air-to-air heat pumps are most practical to operate in areas where the lowest
winter temperature does not go below ______ *F correct answer +10
Air-to-air heat pumps, operating without auxiliary heat, provide air to the
registers that is approximately _______ *F or less. correct answer 100
An air-to-air heat pump has many of the same components as an air conditioning
system. The major difference is that a heat pump also has an correct answer
Reversing valve
An R-410A heat pump operating in the cooling mode has a suction pressure of
131 PSIG. Adding 2 PSIG for pressure drop in the coil, the true outlet pressure is
131 PSIG. The temperature of the suction line at the outlet of the evaporator is
57° F. What is the superheat? correct answer 12 Degrees
An R410A heat pump operating in the heating mode has a suction pressure 50
PSIG and head pressure of 285 PSIG has a compression ratio of; correct answer
4.6:1
As outdoor ambient air temperature decreases, a heat pump's COP; correct
answer Decreases.
At temperatures above 45 degrees *F, the heat pump refrigeration cycle permits
the; correct answer Condenser to release 3 to 4 times more heat than it takes in
electrical energy to drive the compressor.
At what temperature is an outdoor ambient thermostat normally set? correct
answer Slightly above the initial balance point.
