Air Conditioning Certification Exam
(Exam Code A-02)
_________ may be used for leak detection and is secure with all refrigerants. - ANS-soap/
bubble answer
10 lbs. Of refrigerant skip through a water cooled condenser and gives up 20 Btu's of warmth in
step with lbs. At the same time, 10 lbs. Of water passes thru with an getting into temperature of
80 F. The temperature of the water leaving the condenser is; - ANS-a hundred F
A clear glass should imply; - ANS-all liquid refrigerant.
A compound strain guage measures; - ANS-stress and vacuum.
A compressor that has damaged valve with cause those signs; - ANS-excessive suction
pressure and low discharge pressure
A condenser that is utilized in a low ambient temperature conditions need to have a technique of
maintaining a plausible head stress. This can be finished by;
a) fan cycling
b) air shutters or dampers
c) condenser flooding
d) any of the above - ANS-d) all the above
A client calls on the first warm day within the spring and complains of no cooling. Upon
inspection, you fin that the sight glass indicates a full rate, the liquid line is warm, and the unit is
cycling on the motor inner overloads. This will be due to;
a) an overcharge of refrigerant
b) a grimy condenser
c) an inoperative condenser fan
d) any of the above - ANS-d) any of the above
A customer complains that their air con gadget is walking constantly, but not cooling sufficient.
The suction line could be very bloodless and the compressor is sweating.
Technician "A" says this could be resulting from low refrigerant fee and desires to be leak
examined and repaired.
Technician "B" says that these symptoms may want to imply limited go back air waft or a dirty
evaporator.
, Who is accurate? - ANS-Technician "B" most effective.
A client reviews that their residential split machine had a compressor replaced last week by
another provider enterprise. Now the unit isn't cooling properly. When you arrive and inspect the
the unit, you locate that the evaporator seems to be starved of refrigerant. On examining the
condensing unit, you locate that the liquid line is sweating wherein it leaves the filter out-drier.
This ifs a end result of; - ANS-particles from the blistered out compressor has clogged the drier.
A decrease in superheat causes a thermostatic growth valve to; - ANS-close.
A grimy evaporator in an air conditioning gadget will cause these symptoms; - ANS-low suction
stress and low discharge strain
A faulty condenser fan motor on an air conditioning system will cause these symptoms; -
ANS-excessive suction stress and high discharge pressure
A airtight device this is low on fee is indicated with the aid of; - ANS-low head stress
A liquid line filter out-drier should be positioned; - ANS-among the condenser and the metering
device.
A liquid receiver is used; - ANS-to keep liquid refrigerant.
A liquid-to-suction warmness exchanger is often used to - ANS-increase sub-cooling
A low stress cut off transfer is to - ANS-set up a minimal running pressure within the evaporator
A low refrigerant charge in an aircon system will purpose those signs and symptoms; - ANS-low
suction pressure and coffee discharge pressure
A low-facet glide metering tool is used - ANS-on a flooded evaporator
A mechanical shaft seal is important on a; - ANS-open force compressor.
A partly clogged capillary tube can reason; - ANS-a starved evaporator
A refrigerant overcharge in a capillary tube aircon machine will motive the signs; -
ANS-excessive suction strain and excessive discharge strain
A refrigerat gives up warmth while; - ANS-it condenses.
A rise in evaporator stress reasons the automatic enlargement valve to; - ANS-near
(Exam Code A-02)
_________ may be used for leak detection and is secure with all refrigerants. - ANS-soap/
bubble answer
10 lbs. Of refrigerant skip through a water cooled condenser and gives up 20 Btu's of warmth in
step with lbs. At the same time, 10 lbs. Of water passes thru with an getting into temperature of
80 F. The temperature of the water leaving the condenser is; - ANS-a hundred F
A clear glass should imply; - ANS-all liquid refrigerant.
A compound strain guage measures; - ANS-stress and vacuum.
A compressor that has damaged valve with cause those signs; - ANS-excessive suction
pressure and low discharge pressure
A condenser that is utilized in a low ambient temperature conditions need to have a technique of
maintaining a plausible head stress. This can be finished by;
a) fan cycling
b) air shutters or dampers
c) condenser flooding
d) any of the above - ANS-d) all the above
A client calls on the first warm day within the spring and complains of no cooling. Upon
inspection, you fin that the sight glass indicates a full rate, the liquid line is warm, and the unit is
cycling on the motor inner overloads. This will be due to;
a) an overcharge of refrigerant
b) a grimy condenser
c) an inoperative condenser fan
d) any of the above - ANS-d) any of the above
A customer complains that their air con gadget is walking constantly, but not cooling sufficient.
The suction line could be very bloodless and the compressor is sweating.
Technician "A" says this could be resulting from low refrigerant fee and desires to be leak
examined and repaired.
Technician "B" says that these symptoms may want to imply limited go back air waft or a dirty
evaporator.
, Who is accurate? - ANS-Technician "B" most effective.
A client reviews that their residential split machine had a compressor replaced last week by
another provider enterprise. Now the unit isn't cooling properly. When you arrive and inspect the
the unit, you locate that the evaporator seems to be starved of refrigerant. On examining the
condensing unit, you locate that the liquid line is sweating wherein it leaves the filter out-drier.
This ifs a end result of; - ANS-particles from the blistered out compressor has clogged the drier.
A decrease in superheat causes a thermostatic growth valve to; - ANS-close.
A grimy evaporator in an air conditioning gadget will cause these symptoms; - ANS-low suction
stress and low discharge strain
A faulty condenser fan motor on an air conditioning system will cause these symptoms; -
ANS-excessive suction stress and high discharge pressure
A airtight device this is low on fee is indicated with the aid of; - ANS-low head stress
A liquid line filter out-drier should be positioned; - ANS-among the condenser and the metering
device.
A liquid receiver is used; - ANS-to keep liquid refrigerant.
A liquid-to-suction warmness exchanger is often used to - ANS-increase sub-cooling
A low stress cut off transfer is to - ANS-set up a minimal running pressure within the evaporator
A low refrigerant charge in an aircon system will purpose those signs and symptoms; - ANS-low
suction pressure and coffee discharge pressure
A low-facet glide metering tool is used - ANS-on a flooded evaporator
A mechanical shaft seal is important on a; - ANS-open force compressor.
A partly clogged capillary tube can reason; - ANS-a starved evaporator
A refrigerant overcharge in a capillary tube aircon machine will motive the signs; -
ANS-excessive suction strain and excessive discharge strain
A refrigerat gives up warmth while; - ANS-it condenses.
A rise in evaporator stress reasons the automatic enlargement valve to; - ANS-near
