Heat Pump ESCO Exam Questions and Answers With Verified Solutions 2025
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 - ✔✔Reversing valve
What is the difference between "demand defrost" and "timed defrost"? - ✔✔Demand defrost happens
only when needed and timed defrost is based on time/temperature.
The thermostat that controls the auxiliary electric heat according to the outdoor temperature is called
the; - ✔✔Outdoor ambient thermostat
The outdoor temperature at which the heat pump provides the same amount of heat as the heat loss of
the conditioned space without an auxiliary heat is known as the; - ✔✔Initial balance point
At what temperature is an outdoor ambient thermostat normally set? - ✔✔Slightly above the initial
balance point.
The outdoor coil is frozen solid on a "no heat" service call. The most likely reason is; - ✔✔The outdoor
fan is inoperative.
In order to determine a heat pumps' balance point, you must first calculate; - ✔✔The building's heat
load.
When a heat pump is used for heating and cooling, the system is sized by the; - ✔✔Cooling load.
A high efficiency heat pump system designed to function from high to low ambient conditions below
10*F, may have? - ✔✔Two outdoor coils with each one incorporating a dual stage compressor.
Room thermostats for heat pumps should be installed; - ✔✔As near to the main return air grill as
possible.
, When the heat pump compressor has malfunctioned, the customer has the option to switch the system
into; - ✔✔Emergency heat mode.
Start up with a night set back digital thermostat requires the technician to always; - ✔✔Teach the
customer how to program the thermostat.
The heat pump defrost board can be manipulated by the technician to; - ✔✔Simulate the defrost cycle.
The air-to-air heat pump outdoor unit is most efficient if located; - ✔✔In a moderate climate zone.
Which of the following are innovations that may be found on new high efficiency units? - ✔✔ECM fan
motors.
How may a lockout (impedance) relay be reset? - ✔✔Simply disconnect power to the unit momentarily.
The temperature difference between the 1st and 2nd bulbs for heating on a heat pump thermostat is; -
✔✔Approximately 2*F
SEER is calculated by; - ✔✔Dividing the Btu's removed by the watts consumed during the cooling
season.
If the indoor fan is operated at an excessive speed in the cooling mode; - ✔✔The system will not
properly remove the humidity from the conditioned space.
The most preferred method of charging any system in the field is; - ✔✔By weight.
What is the industry standard for deep vacuum? - ✔✔Maintain 500 microns for 15 minutes.
Good service practice for installation of a reversing valve includes; - ✔✔Use heat paste and wet rags
while brazing in the new valve.
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 - ✔✔Reversing valve
What is the difference between "demand defrost" and "timed defrost"? - ✔✔Demand defrost happens
only when needed and timed defrost is based on time/temperature.
The thermostat that controls the auxiliary electric heat according to the outdoor temperature is called
the; - ✔✔Outdoor ambient thermostat
The outdoor temperature at which the heat pump provides the same amount of heat as the heat loss of
the conditioned space without an auxiliary heat is known as the; - ✔✔Initial balance point
At what temperature is an outdoor ambient thermostat normally set? - ✔✔Slightly above the initial
balance point.
The outdoor coil is frozen solid on a "no heat" service call. The most likely reason is; - ✔✔The outdoor
fan is inoperative.
In order to determine a heat pumps' balance point, you must first calculate; - ✔✔The building's heat
load.
When a heat pump is used for heating and cooling, the system is sized by the; - ✔✔Cooling load.
A high efficiency heat pump system designed to function from high to low ambient conditions below
10*F, may have? - ✔✔Two outdoor coils with each one incorporating a dual stage compressor.
Room thermostats for heat pumps should be installed; - ✔✔As near to the main return air grill as
possible.
, When the heat pump compressor has malfunctioned, the customer has the option to switch the system
into; - ✔✔Emergency heat mode.
Start up with a night set back digital thermostat requires the technician to always; - ✔✔Teach the
customer how to program the thermostat.
The heat pump defrost board can be manipulated by the technician to; - ✔✔Simulate the defrost cycle.
The air-to-air heat pump outdoor unit is most efficient if located; - ✔✔In a moderate climate zone.
Which of the following are innovations that may be found on new high efficiency units? - ✔✔ECM fan
motors.
How may a lockout (impedance) relay be reset? - ✔✔Simply disconnect power to the unit momentarily.
The temperature difference between the 1st and 2nd bulbs for heating on a heat pump thermostat is; -
✔✔Approximately 2*F
SEER is calculated by; - ✔✔Dividing the Btu's removed by the watts consumed during the cooling
season.
If the indoor fan is operated at an excessive speed in the cooling mode; - ✔✔The system will not
properly remove the humidity from the conditioned space.
The most preferred method of charging any system in the field is; - ✔✔By weight.
What is the industry standard for deep vacuum? - ✔✔Maintain 500 microns for 15 minutes.
Good service practice for installation of a reversing valve includes; - ✔✔Use heat paste and wet rags
while brazing in the new valve.
