Test
Unit 62 - Exam
Preguntas del test (22)
1How does the heating-cycle charge compensator aid the heating cycle?
- AIt makes the gas line cold.
- BIt raises the temperature of the refrigerant.
- CIt stores the unneeded refrigerant.
- DIt fills with hot air.
2How is the COP rating different from the HSPF?
- AHSPF takes data from multiple weather conditions.
- BOnly the HSPF measures heating and cooling units.
- COnly the COP measures defrost.
- DCOP takes data from multiple weather conditions.
3Because air source heat pumps circulate less refrigerant at low ambient temperatures, the refrigerant not being used is stored
- AIn a liquid receiver
- BIn the compressor crankcase
- CIn a suction accumulator or charge compensator
- DIn the metering device
4How is heat pump Coefficient of Performance, COP, calculated?
- ACOP is the ratio of heat output divided by heat input measured at one particular condition
- BCOP is a measure of heating BTUs per watt averaged for the entire heating season
- CCOP is a measure of heating BTUs per watt measured at one particular condition
- DCOP is the ratio of heat output divided by heat input averaged for the entire heating season
5How is heat pump Heating Seasonal Performance Factor, HSPF, calculated?
- AHSPF is the ratio of heat output divided by heat input measured at one particular condition.
- BHSPF is a measure of heating BTUs per watt measured at one particular condition
- CHSPF is the ratio of heat output divided by heat input averaged for the entire heating season
- DHSPF is a measure of heating BTUs per watt averaged for the entire heating season
6What prevents the refrigerant from flowing through the indoor metering device during the heating cycle?
- AThe outdoor check valve
- BThe heating shutoff valve
- CThe indoor check valve
- DThe reversing valve
7Heat pump A has a SEER rating of 16 and an HSPF rating of 7. Heat pump B has a SEER rating of 14 and an HSPF rating of 9. Which heat pump cools more efficiently?
- AHeat pump A
- BHeat pump B
- CThey are about the same heating efficiency by the time both the SEER and HSPF are considered
- DNeither the SEER nor the HSPF can determine which heat pump heats more efficiently
8What is the main difference between a heat pump and a fossil fuel furnace?
- AFossil fuel furnaces have been around longer.
- BFossil fuel furnaces are hotter.
- CHeat pumps are easier to install.
- DHeat pumps move heat instead of creating it.
9How can an air source heat pump heat when the outdoor temperature is cold?
- AThe friction of the air passing over the outdoor coil raises the temperature
- BAll molecules contain some heat until they reach absolute 0 (-460ºF)
- CAir source heat pumps only use the outdoor air in the cooling season
- DAll heating is accomplished with electrical resistance heaters, so the air temperature is irrelevant
10How can you lower the temperature at which evaporation takes place?
- AReduce the pressure on the low side of the system
- BRaise the pressure on the low side of the pump
- CDecrease the pressure on the high side of the pump
- DAdd more refrigerant into the pump
11Which of the following is the correct order of the flow in the heating cycle of an air source heat pump?
- Acompressor, reversing valve, indoor coil, outdoor TEV, outdoor coil, reversing valve
- Breversing valve, indoor coil, outdoor coil, outdoor TEV, compressor
- CIndoor TEV, indoor coil, reversing valve, compressor, reversing valve, outdoor coil
- Dcompressor, reversing valve, outdoor coil, indoor TEV, indoor coil, reversing valve
12When are most heat pump reversing valves energized?
- ADuring both the defrost and cooling cycles
- BDuring the cooling cycle
- CDuring the defrost cycle
- DDuring the heating cycle
13What makes the main valve in the reversing valve shift from one side to the other?
- AA small gear motor that is operated on 24 volts engages gears on the back of the valve core
- BAn electronic stepper motor mounted on one end of the reversing valve
- CPressure difference from one side of the valve to the other
- DA solenoid coil creates a magnetic field that pulls the valve to one end and repels it to the other
14Which of the following is responsible for shifting the position of the sliding cylinder?
- Acondensation
- Bpressure
- Crefrigerant
- Dgravity
15The heat source for an air source heat pump is
- Athe air inside the house
- Bthe air outside the house
- Cthe water in the water loop
- Delectric strip heat
16How are heat pumps classified?
- Aby their cooling source and cooling sink
- Bby their air intake pump
- Cby their heat source and heat sink
- Dby their refrigerant type
17How can a heat pump filter drier be differentiated from a standard filter drier?
- ABy the shiny, polished appearance of the stainless steel core
- BBy the two copper lines on each end of the drier
- CBy the 600 psig pressure rating
- DBy the directional arrows pointing towards both ends of the drier
18When is the outdoor metering device bypassed?
- AThe cooling cycle
- BThe heating cycle
- CBoth the cooling and defrost cycles
- DBoth the heating and defrost cycles
19When is the indoor metering device bypassed?
- AThe heating cycle
- BThe cooling cycle
- CBoth the cooling and defrost cycles
- DBoth the heating and cooling cycles
20A bi-flow thermostatic expansion valve
- Acan be used with two different refrigerants by selecting the correct flow
- Bcan be used for creating two stages of heating or cooling
- Callows refrigerant flow in both directions
- Dcan be used with two different capacity units by selecting the correct flow
21Liquid floodback commonly occurs on air source heat pumps
- Awhen the defrost cycle is terminated and the cycle reverses
- Bwhen the heat pump is operated in cooling with a low charge
- Cwhen the liquid filter drier is stopped up
- Dwhen the heat pump is operated in heating on a warm day
22Heat pump A has a SEER rating of 16 and an HSPF rating of 7. Heat pump B has a SEER rating of 14 and an HSPF rating of 9. Which heat pump heats more efficiently?
- AHeat pump A
- BHeat pump B
- CThey are about the same heating efficiency by the time both the SEER and HSPF are considered
- DNeither the SEER nor the HSPF can determine which heat pump heats more efficiently
Información
- Descripción
- Unit 62 - Heat Pump System Fundamentals
- Autor
- Neil Revollo
- Idioma
- English
- Visitas
- 757
- Etiquetas
- Valoración
- Aún sin valoraciones Valora este test