HPSV ANSWERS AND QUESTIONS SET A+
✔✔In a heat pump refrigerant circuit, and open check valve is used to: - ✔✔A. Bypass
refrigerant flow around a metering device
✔✔Manufacturers recommend noncommunicating thermostat wire used in residential
applications should not be less than: - ✔✔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)? - ✔✔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? - ✔✔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: - ✔✔A. Curb gasket
✔✔What is an important reason for using electronica defrost controls? - ✔✔A. They
provide more accurate control
✔✔Refrigerant sub cooling is a measurement of the difference between: - ✔✔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? - ✔✔D. Four or 8 o'clock
✔✔What measurements would be needed to properly evaluate a complaint of drafty
operation with a heating system? - ✔✔D. System TD, drop, and static pressure
✔✔In a heat pump refrigerant circuit, and open check valve is used to: - ✔✔A. Bypass
refrigerant flow around a metering device
✔✔Manufacturers recommend noncommunicating thermostat wire used in residential
applications should not be less than: - ✔✔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)? - ✔✔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? - ✔✔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: - ✔✔A. Curb gasket
✔✔What is an important reason for using electronica defrost controls? - ✔✔A. They
provide more accurate control
✔✔Refrigerant sub cooling is a measurement of the difference between: - ✔✔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? - ✔✔D. Four or 8 o'clock
✔✔What measurements would be needed to properly evaluate a complaint of drafty
operation with a heating system? - ✔✔D. System TD, drop, and static pressure
