HPSV Exam Questions and Answers Graded A+
With an R-410A condensing pressure of 395 psig and a liquid line temperature of 108°F what is the sub
cooling temperature? - Answers D. 8°F
When performing maintenance on a heat pump the technician should check the outdoor fan to be
certain: - Answers C. The fan runs freely without binding or vibrations
The continuity of a fuse in a disconnect should be tested by checking resistance: - Answers A. With
power off
Why does the outdoor fan on a heat pump stopped during defrost? - Answers C. Minimize defrost time
It technician measures the return air temperature of 100,000 BTU output furnace to be 65°F and the
supply side air temperature is 135°F. what is the SCFM(standard CFM)? - Answers B. 1323 SCFM
The following measurements are recorded on an operating heat pump system. The heat pump is
operating with the compressor only with no auxiliary heat.
-heat pump only supply air temperature 92°F, heat pump only return air temperature 70°F, outdoor
temperature 54°F, supply air temp./Auxiliary heat on 115°F, return air temp./Auxiliary heat on 70°F,
CFM 1228
What is the heating capacity of the unit in BTU/H? - Answers D. 29,177 btu/h
R-410A Vapor in line diameters with links 50 feet or less are typically specified for a vapor pressure drop
that does not exceed what value? - Answers B. 3 psi
Which of the following is used to make accurate residential loan calculations? - Answers B. ACCA manual
J
The following conditions exist in a circuit that supplies power to three parallel loads:
One load is resistive, one load is capacitive, one load is inductive
The total current in the circuit when operating will be: - Answers D. The sum of the currents through
each load
what condition can cause a reduction from design capacity in a heat pump? - Answers A. An undersized
vapor line
What can happen if defrost runoff is not properly drained away? - Answers B. Ice can build up on the
bottom of the coil
Undersized ductwork often cause: - Answers C. High air quantities and high static pressures
Where is the sensor of an outdoor ambient thermostat for a heat pump system typically installed? -
Answers C. In the entering airstream to the outdoor coil
, What effect does a low charge have on the switch over operations of a reversing valve? - Answers C.
Reversing valves are less likely to shift if charge is very low
The technician is using an analog multi meter to check a run capacitor. With the meter set to OHMS the
needle swings towards zero and then slowly rise is toward infinity. What does this tell the technician
about the capacitor? - Answers D. The capacitor charges and discharges
What is the typical method of staging a two stage compressor in a heat pump system? - Answers B. It is
based on deviation from the thermostat set point
In a heat pump refrigerant circuit, and open check valve is used to: - Answers A. Bypass refrigerant flow
around a metering device
Manufacturers recommend noncommunicating thermostat wire used in residential applications should
not be less than: - Answers B. 18 gauge AWG
What is the recommended total external static pressure used for heating and cooling equipment with
blowers for 5 tons of cooling or less (excluding high velocity)? - Answers B. 0.5 IWC
Referred to the diagram above and answer the question: when troubleshooting and energized electrical
circuit on an electric heat section, 244 V is measured across the element at points a and B and no
amperage is measured. What is the problem with the system? - Answers D. The electric element is open
The component used to reduce sound transmission and prevent water leaks of a package heat pump
installed on a roof is the: - Answers A. Curb gasket
What is an important reason for using electronica defrost controls? - Answers A. They provide more
accurate control
Refrigerant sub cooling is a measurement of the difference between: - Answers C. Condensing
saturation temperature and liquid line temperature
Two more accurately since the refrigerant temperature of horizontal suction lines that are one and an
8th inch or larger a thermostatic expansion valve sensing bulb that should be mounted at which
positions? - Answers D. Four or 8 o'clock
What measurements would be needed to properly evaluate a complaint of drafty operation with a
heating system? - Answers D. System TD, drop, and static pressure
What is the effect on supply airflow using a PSC blower motor when static pressure on the return is
eliminated - Answers B. Airflow will be increased
Drive cleats are typically installed where on rectangular duct? - Answers D. On the shorter sides
A suction line accumulator should be used in a residential heat pump only when recommended by the
manufacturer is: - Answers A. Long refrigerant lines increase system charge over recommended
maximum charge
With an R-410A condensing pressure of 395 psig and a liquid line temperature of 108°F what is the sub
cooling temperature? - Answers D. 8°F
When performing maintenance on a heat pump the technician should check the outdoor fan to be
certain: - Answers C. The fan runs freely without binding or vibrations
The continuity of a fuse in a disconnect should be tested by checking resistance: - Answers A. With
power off
Why does the outdoor fan on a heat pump stopped during defrost? - Answers C. Minimize defrost time
It technician measures the return air temperature of 100,000 BTU output furnace to be 65°F and the
supply side air temperature is 135°F. what is the SCFM(standard CFM)? - Answers B. 1323 SCFM
The following measurements are recorded on an operating heat pump system. The heat pump is
operating with the compressor only with no auxiliary heat.
-heat pump only supply air temperature 92°F, heat pump only return air temperature 70°F, outdoor
temperature 54°F, supply air temp./Auxiliary heat on 115°F, return air temp./Auxiliary heat on 70°F,
CFM 1228
What is the heating capacity of the unit in BTU/H? - Answers D. 29,177 btu/h
R-410A Vapor in line diameters with links 50 feet or less are typically specified for a vapor pressure drop
that does not exceed what value? - Answers B. 3 psi
Which of the following is used to make accurate residential loan calculations? - Answers B. ACCA manual
J
The following conditions exist in a circuit that supplies power to three parallel loads:
One load is resistive, one load is capacitive, one load is inductive
The total current in the circuit when operating will be: - Answers D. The sum of the currents through
each load
what condition can cause a reduction from design capacity in a heat pump? - Answers A. An undersized
vapor line
What can happen if defrost runoff is not properly drained away? - Answers B. Ice can build up on the
bottom of the coil
Undersized ductwork often cause: - Answers C. High air quantities and high static pressures
Where is the sensor of an outdoor ambient thermostat for a heat pump system typically installed? -
Answers C. In the entering airstream to the outdoor coil
, What effect does a low charge have on the switch over operations of a reversing valve? - Answers C.
Reversing valves are less likely to shift if charge is very low
The technician is using an analog multi meter to check a run capacitor. With the meter set to OHMS the
needle swings towards zero and then slowly rise is toward infinity. What does this tell the technician
about the capacitor? - Answers D. The capacitor charges and discharges
What is the typical method of staging a two stage compressor in a heat pump system? - Answers B. It is
based on deviation from the thermostat set point
In a heat pump refrigerant circuit, and open check valve is used to: - Answers A. Bypass refrigerant flow
around a metering device
Manufacturers recommend noncommunicating thermostat wire used in residential applications should
not be less than: - Answers B. 18 gauge AWG
What is the recommended total external static pressure used for heating and cooling equipment with
blowers for 5 tons of cooling or less (excluding high velocity)? - Answers B. 0.5 IWC
Referred to the diagram above and answer the question: when troubleshooting and energized electrical
circuit on an electric heat section, 244 V is measured across the element at points a and B and no
amperage is measured. What is the problem with the system? - Answers D. The electric element is open
The component used to reduce sound transmission and prevent water leaks of a package heat pump
installed on a roof is the: - Answers A. Curb gasket
What is an important reason for using electronica defrost controls? - Answers A. They provide more
accurate control
Refrigerant sub cooling is a measurement of the difference between: - Answers C. Condensing
saturation temperature and liquid line temperature
Two more accurately since the refrigerant temperature of horizontal suction lines that are one and an
8th inch or larger a thermostatic expansion valve sensing bulb that should be mounted at which
positions? - Answers D. Four or 8 o'clock
What measurements would be needed to properly evaluate a complaint of drafty operation with a
heating system? - Answers D. System TD, drop, and static pressure
What is the effect on supply airflow using a PSC blower motor when static pressure on the return is
eliminated - Answers B. Airflow will be increased
Drive cleats are typically installed where on rectangular duct? - Answers D. On the shorter sides
A suction line accumulator should be used in a residential heat pump only when recommended by the
manufacturer is: - Answers A. Long refrigerant lines increase system charge over recommended
maximum charge
