ESCO A/C QUESTIONS AND CORRECT
ANSWERS
the movement of heat by direct contact is ANSW✅✅conduction
the standard unit for measuring the quantity of heat in a substance is ANSW✅✅btu
refrigerant gives up heat when ANSW✅✅it condenses
why must refrigerant in the suction line be slightly warmer than the saturation temperature?
ANSW✅✅prevent liquid slugging of the compressor
the state of the refrigerant in the suction line should be ANSW✅✅low pressure / low temperature
vapor
the state of the refrigerant entering the condenser is ANSW✅✅high pressure / highly
superheated vaoor
the evaporator ANSW✅✅Transfers heat from the refrigerated space to the refrigerant
heat which causes a change in temperature of a substance is called ANSW✅✅sensible heat
Heat added to a substance without a rise in temperature ANSW✅✅latent heat of vaporization
Heat added to the refrigerant in a vapor state after the evaporation process is called
ANSW✅✅superheat
scroll compressor move refrigerant by ANSW✅✅involute spirals
the movement of heat by way of fluid is called ANSW✅✅convection
which of the following is not a thermodynamic property of refrigerants ANSW✅✅flammability
, The sequential order of steps in the vapor compressions process are ANSW✅✅compression,
condensation, expansion, vaporization
if a 30 pound cylinder of reclaimed R 410 a refrigerant has been stored overnight at 70° the pressure
in the cylinder should be approximately ANSW✅✅201 psig
fan airflow pressures are usually measured in ANSW✅✅inches of water column
0 pounds per square inch absolute is ANSW✅✅A pressure which cannot be further reduced
0 pounds per square inch gauge is ANSW✅✅The same as atmospheric pressure
The temperature at which moisture will start to condense from the air is called
ANSW✅✅Dewpoint temperature
compound pressure gauge measures ANSW✅✅pressure and vacuum
mechanical shaft seal is necessary on a ANSW✅✅Open Drive compressor
liquid slugging is ANSW✅✅liquid refrigerant in the compressor clearance space
The clearance space in reciprocating compressor ANSW✅✅has an effect on compressor capacity
which of the following types of air conditioning compressor is is most energy efficient
ANSW✅✅scroll
Which of the following represent the right order for the functions of a condenser ANSW✅✅de
superheat, condenses, sub cools
refrigerant R 134a vapor enters the condenser at 124 psi G, 100°F. it leaves as liquid liquid from the
condenser subcooled 20°F and the pressure will be approximately ANSW✅✅87 psig
ANSWERS
the movement of heat by direct contact is ANSW✅✅conduction
the standard unit for measuring the quantity of heat in a substance is ANSW✅✅btu
refrigerant gives up heat when ANSW✅✅it condenses
why must refrigerant in the suction line be slightly warmer than the saturation temperature?
ANSW✅✅prevent liquid slugging of the compressor
the state of the refrigerant in the suction line should be ANSW✅✅low pressure / low temperature
vapor
the state of the refrigerant entering the condenser is ANSW✅✅high pressure / highly
superheated vaoor
the evaporator ANSW✅✅Transfers heat from the refrigerated space to the refrigerant
heat which causes a change in temperature of a substance is called ANSW✅✅sensible heat
Heat added to a substance without a rise in temperature ANSW✅✅latent heat of vaporization
Heat added to the refrigerant in a vapor state after the evaporation process is called
ANSW✅✅superheat
scroll compressor move refrigerant by ANSW✅✅involute spirals
the movement of heat by way of fluid is called ANSW✅✅convection
which of the following is not a thermodynamic property of refrigerants ANSW✅✅flammability
, The sequential order of steps in the vapor compressions process are ANSW✅✅compression,
condensation, expansion, vaporization
if a 30 pound cylinder of reclaimed R 410 a refrigerant has been stored overnight at 70° the pressure
in the cylinder should be approximately ANSW✅✅201 psig
fan airflow pressures are usually measured in ANSW✅✅inches of water column
0 pounds per square inch absolute is ANSW✅✅A pressure which cannot be further reduced
0 pounds per square inch gauge is ANSW✅✅The same as atmospheric pressure
The temperature at which moisture will start to condense from the air is called
ANSW✅✅Dewpoint temperature
compound pressure gauge measures ANSW✅✅pressure and vacuum
mechanical shaft seal is necessary on a ANSW✅✅Open Drive compressor
liquid slugging is ANSW✅✅liquid refrigerant in the compressor clearance space
The clearance space in reciprocating compressor ANSW✅✅has an effect on compressor capacity
which of the following types of air conditioning compressor is is most energy efficient
ANSW✅✅scroll
Which of the following represent the right order for the functions of a condenser ANSW✅✅de
superheat, condenses, sub cools
refrigerant R 134a vapor enters the condenser at 124 psi G, 100°F. it leaves as liquid liquid from the
condenser subcooled 20°F and the pressure will be approximately ANSW✅✅87 psig
