HVAC ESCO Basic Test Review.pdf file:///C:/Users/HP/Desktop/New%20fl/HVAC%20ESCO%20Basic%
HVAC ESCO Basic Test Review Actual
Questions & Answers
1. A liquid to suction heat exchanger is often used to
A. Decrease Vapor Superheat
B. Increase liquid subcooling
C. Decrease head pressure
D. Increase Flash gas in the suction line
Answer B. Increase liquid subcooling
2. The term, refrigerant conditions refer to which of the following
A. Saturated, superheat, or subcooling refrigerant
B. Pressurized refrigerant only
C. A system in a complete vacuum
D. the outdoor ambient air temperature
Answer A. Saturated, superheat, or subcooling
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3. The component in the refrigeration system used to catch and prevent liquidfrom
entering the compressor is called the
A. Liquid receiver
B. The accumulator
C. The oil separator
D. The filter dryer
Answer B. The Accumulator
4. An air conditioning system or heat pump must have
A. 550-600 cubic feet of air per minute across the evaporator coil
B. 500-550 cubic feet of air per minute across the evaporator coil
C. 400-450 cubic feet of air per minute across the evaporator coil
D. Less than 400 cubic feet of air per minute across the evaporator coil
Answer C.400-450 cubic feet of air per minute across the evaporator coil
5. The refrigerant charge in a TXV remote bulb or power element must
A. Be changed when the filter dryer is changed
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B. Have similar characteristics to the refrigerant in the system
C. Be discharged before it is effective
D. Have pressure similar to R-134A
Answer B. Have similar characteristics to the refrig-erant in the system
6. The remote bulb of a TXV should be fastened to the
A. Outlet of the TXV, about 6 inches
B. Inlet of the TXV about 6 inches
C. Outlet of the condenser, and on the superheat line
D. Outlet of the evaporator
Answer D. Outlet of the evaporator
7. which of the following isTRUE, of a solenoid value in a pump down system?
A. It is located after the metering device
B. It is located before the metering device
C. It is located after the evaporator
D. It is used instead of a metering device
Answer B. It is located before the meteringdevice
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