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HVAC EXCELLENCE Latest Update - Actual Exam 100 Questions with 100% Verified Correct Answers Guaranteed A+ Verified by Professor
- CORRECT ANSWER:
____ can be used for leak detection with ALL high pressure refrigerants - CORRECT
ANSWER: Soap Bubbles
10 lbs of refrigerant passing through a water cooled condenser will lose 20 BTU of heat/ pound. If 10#'s of water passes through the condenser with an entering temp of 80
degrees, the temp of the water leaving the condenser is - CORRECT ANSWER: 100
degrees faranheit
A Compound pressure gauge measures - CORRECT ANSWER: Pressure and Vacuum
A compressor that has a broken reed valve will cause these symptoms - CORRECT
ANSWER: high suction pressure and low discharge pressure
A customer complains that their AC system is running constantly, but not cooling enough. The suction line is very colde and the compressor is sweating. Mostlikely cause
is - CORRECT ANSWER: a restriction of the return air or dirty evaporator
A decrease in superheat causes the thermostatic expansion valve to - CORRECT
ANSWER: Close
a dirty evaporator in an AC system will cause these symptoms - CORRECT ANSWER:
low suction pressure and low discharge pressure. 1 / 2
A drain trap should be installed on a split system when the - CORRECT ANSWER: Air handler drain is on the negative side
a faulty condenser fan motor on an AC system will cause these symptoms - CORRECT
ANSWER: high suction pressure and high discharge pressure
A Liquid line filter drier should be placed between the - CORRECT ANSWER:
Condenser and metering device
A liquid reciever is used to - CORRECT ANSWER: Store liquid refrigerant
A liquid-to-suction heat exchanger is often used to - CORRECT ANSWER: Increase
liquid subcooling
A low pressure cut-off switch is used to - CORRECT ANSWER: Establish a minimum
operating pressure in the evaporator
A low refrigerant charge in an AC system will cause these symptoms - CORRECT
ANSWER: low suction pressure and low discharge pressure
A Mechanical shaft seal is necesssary on a - CORRECT ANSWER: Open drive
compressor
a partially clogged capillary tube metering device can cause - CORRECT ANSWER: a starved evaporator
A partially iced over evaporator can be caused by - CORRECT ANSWER: an
undercharge
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