REFRIGERATION ESCO QUESTIONS
AND CORRECT ANSWERS
the evaporator... ANSW✅✅Transfers heat from the refrigerated space to the refrigerant
which is not a thermodynamic property of refrigerants ANSW✅✅flammability
Zero psia (pounds per square inch absolute) is; ANSW✅✅a pressure which cannot be further
reduced
zero psig is the same as ANSW✅✅atmospheric pressure
the temperature at which moisture will start to condense from the air is called... ANSW✅✅dew
point temperature
a compound pressure gauge measures... ANSW✅✅pressure and vacuum
the main function of the condenser is to... ANSW✅✅To remove heat from the refrigerant
The heat removed from the refrigerant by the condenser is; ANSW✅✅Both sensible and latent
heat.
in the evaporator... ANSW✅✅latent heat is transferred from the refrigerated space to the
refrigerant
an overcharge of refrigerant will cause... ANSW✅✅increased head pressure
Heat which is added to a vapor after the change of state occurs is called ANSW✅✅superheat
A refrigerant gives up heat when; ANSW✅✅it condenses
, it is desirable for refrigerant in the suction line to be slightly superheated in order to...
ANSW✅✅ensure liquid refrigerant does not enter the compressor
state of refrigerant in the suction line should be... ANSW✅✅low pressure/ low temperature vapor
state of refrigerant entering the condenser is... ANSW✅✅high pressure/ highly superheated
vapor
the clearance space in a reciprocating compressor... ANSW✅✅has no effect on compressor
capacity
which of the following types of air conditioning compressors is most energy efficient
ANSW✅✅centrifugal
the main function of the condenser is to... ANSW✅✅To remove heat from the refrigerant
Refrigerant R-134a vapor enters the condenser at 124psig, 100°F. it leaves the condenser at 80°F. its
pressure will be approximately... ANSW✅✅124psig
three basic types of condensers are water cooled, air cooled, and ___ cooled.
ANSW✅✅evaporative
10 lbs. of refrigerant passing through a water cooled condenser will lose 20 btu's of heat per lb. if
10lbs of water passes through the condenser with an entering air temperature of 80°F. the
temperature of the water leaving the condenser is... ANSW✅✅100°F
which of the following can not be used as a low ambient temperature control ANSW✅✅crankcase
regulating valve
when testing the efficiency of an AIR COOLED condenser, the refrigerant condensing temperature
should be no more than ___ higher than the leaving air temperature ANSW✅✅approximately
30°F
AND CORRECT ANSWERS
the evaporator... ANSW✅✅Transfers heat from the refrigerated space to the refrigerant
which is not a thermodynamic property of refrigerants ANSW✅✅flammability
Zero psia (pounds per square inch absolute) is; ANSW✅✅a pressure which cannot be further
reduced
zero psig is the same as ANSW✅✅atmospheric pressure
the temperature at which moisture will start to condense from the air is called... ANSW✅✅dew
point temperature
a compound pressure gauge measures... ANSW✅✅pressure and vacuum
the main function of the condenser is to... ANSW✅✅To remove heat from the refrigerant
The heat removed from the refrigerant by the condenser is; ANSW✅✅Both sensible and latent
heat.
in the evaporator... ANSW✅✅latent heat is transferred from the refrigerated space to the
refrigerant
an overcharge of refrigerant will cause... ANSW✅✅increased head pressure
Heat which is added to a vapor after the change of state occurs is called ANSW✅✅superheat
A refrigerant gives up heat when; ANSW✅✅it condenses
, it is desirable for refrigerant in the suction line to be slightly superheated in order to...
ANSW✅✅ensure liquid refrigerant does not enter the compressor
state of refrigerant in the suction line should be... ANSW✅✅low pressure/ low temperature vapor
state of refrigerant entering the condenser is... ANSW✅✅high pressure/ highly superheated
vapor
the clearance space in a reciprocating compressor... ANSW✅✅has no effect on compressor
capacity
which of the following types of air conditioning compressors is most energy efficient
ANSW✅✅centrifugal
the main function of the condenser is to... ANSW✅✅To remove heat from the refrigerant
Refrigerant R-134a vapor enters the condenser at 124psig, 100°F. it leaves the condenser at 80°F. its
pressure will be approximately... ANSW✅✅124psig
three basic types of condensers are water cooled, air cooled, and ___ cooled.
ANSW✅✅evaporative
10 lbs. of refrigerant passing through a water cooled condenser will lose 20 btu's of heat per lb. if
10lbs of water passes through the condenser with an entering air temperature of 80°F. the
temperature of the water leaving the condenser is... ANSW✅✅100°F
which of the following can not be used as a low ambient temperature control ANSW✅✅crankcase
regulating valve
when testing the efficiency of an AIR COOLED condenser, the refrigerant condensing temperature
should be no more than ___ higher than the leaving air temperature ANSW✅✅approximately
30°F
