HVAC EXCELLENCE
- ANS-
____ may be used for leak detection with ALL high stress refrigerants - ANS-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 thru the condenser with an entering temp of eighty levels, the temp of
the water leaving the condenser is - ANS-a hundred stages faranheit
A Compound stress gauge measures - ANS-Pressure and Vacuum
A compressor that has a broken reed valve will cause these symptoms - ANS-high suction
stress and coffee discharge pressure
A customer complains that their AC system is going for walks constantly, however no longer
cooling sufficient. The suction line could be very colde and the compressor is sweating.
Mostlikely reason is - ANS-a limit of the return air or grimy evaporator
A lower in superheat reasons the thermostatic growth valve to - ANS-Close
a grimy evaporator in an AC device will purpose those symptoms - ANS-low suction pressure
and occasional discharge pressure.
A drain lure must be set up on a cut up device while the - ANS-Air handler drain is at the bad
aspect
a faulty condenser fan motor on an AC gadget will reason these signs - ANS-excessive suction
stress and excessive discharge strain
A Liquid line filter drier should be located among the - ANS-Condenser and metering device
A liquid reciever is used to - ANS-Store liquid refrigerant
A liquid-to-suction warmness exchanger is often used to - ANS-Increase liquid subcooling
A low pressure reduce-off transfer is used to - ANS-Establish a minimum working stress inside
the evaporator
A low refrigerant charge in an AC gadget will reason these signs - ANS-low suction stress and
low discharge pressure
, A Mechanical shaft seal is necesssary on a - ANS-Open force compressor
a partially clogged capillary tube metering tool can cause - ANS-a starved evaporator
A partly iced over evaporator can be caused by - ANS-an undercharge
A refrigerant gives up heat whilst it; - ANS-it condenses
A refrigerant overcharge in a capillary tube aircon gadget will cause - ANS-High suction
pressure and excessive Discharge pressure
A rise in evaporator strain causes the automatic growth valve to start to - ANS-near
A scroll compressor moves refrigerant by means of; - ANS-involute spirals
A sight glass could generally be placed - ANS-inside the liquied line, earlier than the metering
device
A TEV sensing bulb which will become detached from the suction line will motive those signs
and symptoms - ANS-high suction pressure and higher than normal dischage strain
a thermal-electric powered ( strong country) growth valveis controlled via - ANS-NTC Thermistor
A thermostatic growth valve is designed to preserve - ANS-Constant evaporator superheat
After a device has been opened and the compressor modified, the carrier technician ought to: -
ANS-update the filter drier, leak test, evacuate and price
air or different non-condensable gasses in a capillary tube AC device will motive - ANS-High
suction stress and excessive discharge stress
an AC gadget this is oversized can motive - ANS-inefficient dehumidification of the conditioned
space
An accumulator is used to - ANS-Prevent liquid refrigerant from attaining the compressor
An automated enlargement valve is fine proper: - ANS-When the machine load stays pretty
consistent
An power restoration ventilator is - ANS-an air to air warmness exhanger to get better heat
an increase in head pressure reasons __ refrigerant to drift thru a capillary tube - ANS-More
- ANS-
____ may be used for leak detection with ALL high stress refrigerants - ANS-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 thru the condenser with an entering temp of eighty levels, the temp of
the water leaving the condenser is - ANS-a hundred stages faranheit
A Compound stress gauge measures - ANS-Pressure and Vacuum
A compressor that has a broken reed valve will cause these symptoms - ANS-high suction
stress and coffee discharge pressure
A customer complains that their AC system is going for walks constantly, however no longer
cooling sufficient. The suction line could be very colde and the compressor is sweating.
Mostlikely reason is - ANS-a limit of the return air or grimy evaporator
A lower in superheat reasons the thermostatic growth valve to - ANS-Close
a grimy evaporator in an AC device will purpose those symptoms - ANS-low suction pressure
and occasional discharge pressure.
A drain lure must be set up on a cut up device while the - ANS-Air handler drain is at the bad
aspect
a faulty condenser fan motor on an AC gadget will reason these signs - ANS-excessive suction
stress and excessive discharge strain
A Liquid line filter drier should be located among the - ANS-Condenser and metering device
A liquid reciever is used to - ANS-Store liquid refrigerant
A liquid-to-suction warmness exchanger is often used to - ANS-Increase liquid subcooling
A low pressure reduce-off transfer is used to - ANS-Establish a minimum working stress inside
the evaporator
A low refrigerant charge in an AC gadget will reason these signs - ANS-low suction stress and
low discharge pressure
, A Mechanical shaft seal is necesssary on a - ANS-Open force compressor
a partially clogged capillary tube metering tool can cause - ANS-a starved evaporator
A partly iced over evaporator can be caused by - ANS-an undercharge
A refrigerant gives up heat whilst it; - ANS-it condenses
A refrigerant overcharge in a capillary tube aircon gadget will cause - ANS-High suction
pressure and excessive Discharge pressure
A rise in evaporator strain causes the automatic growth valve to start to - ANS-near
A scroll compressor moves refrigerant by means of; - ANS-involute spirals
A sight glass could generally be placed - ANS-inside the liquied line, earlier than the metering
device
A TEV sensing bulb which will become detached from the suction line will motive those signs
and symptoms - ANS-high suction pressure and higher than normal dischage strain
a thermal-electric powered ( strong country) growth valveis controlled via - ANS-NTC Thermistor
A thermostatic growth valve is designed to preserve - ANS-Constant evaporator superheat
After a device has been opened and the compressor modified, the carrier technician ought to: -
ANS-update the filter drier, leak test, evacuate and price
air or different non-condensable gasses in a capillary tube AC device will motive - ANS-High
suction stress and excessive discharge stress
an AC gadget this is oversized can motive - ANS-inefficient dehumidification of the conditioned
space
An accumulator is used to - ANS-Prevent liquid refrigerant from attaining the compressor
An automated enlargement valve is fine proper: - ANS-When the machine load stays pretty
consistent
An power restoration ventilator is - ANS-an air to air warmness exhanger to get better heat
an increase in head pressure reasons __ refrigerant to drift thru a capillary tube - ANS-More
