1
Refrigeration ESCO Questions with Correct
Answers for Specific Exam Mail
heat which causes a change in temperature of a substance is called
Ans: sensible heat
heat which causes a change in state of a material without a change in
temperature is called
Ans: latent heat
heat which is added to a vapor after the change of state occurs is called
Ans: superheat
heat can travel by
Ans: conduction, convection, radiation
the movement a heat by the way of a fluid or air is called
Ans: convection
the movement of heat by direct contact is called
Ans: conduction
the standard unit for measuring the quantity of heat in a substance is
Pretest - Stuvia US
,2
Ans: the british thermal unit
a refrigerant gives up heat when
Ans: it condenses
it is desirable for refrigerant in the suction line to be slighlty superheat in order
to
Ans: insure liquid refrigerant does not enter the compressor
the state of the refrigerant in the suction line should be
Ans: low pressure/ low temperature vapor
the state of the refrigerant entering the condenser is
Ans: high pressure/ highly superheated vapor
the evaporator
Ans: transfers heat from the refrigerated space to the refrigerant
thermodynamic properties of refrigerants
Ans: critical point, enthalpy, and saturation point
the sequential order of steps in the vapor- compression process are
Ans: compression, condensation, expansion, and vaporization
Pretest - Stuvia US
, 3
If a 30 pound cylinder of reclaimed R410A refrigerant has been stored over
night at 70 degrees, the pressure in the cylinder should be approx
Ans: 201 psig
Zero psia is
Ans: A pressure which cannot be further reduced
Zero psig is
Ans: the same as atmospheric pressure
the temperature at which moisture will start to condense from the air is
called
Ans: dew point temperature
a compound pressure gauge measures
Ans: pressure and vacuum
the main function of the condenser is to
Ans: remove heat from the refrigerant
the heat removed from the refrigerant by the condenser is
Ans: both sensible and latent heat
in the evaporator
Pretest - Stuvia US
Refrigeration ESCO Questions with Correct
Answers for Specific Exam Mail
heat which causes a change in temperature of a substance is called
Ans: sensible heat
heat which causes a change in state of a material without a change in
temperature is called
Ans: latent heat
heat which is added to a vapor after the change of state occurs is called
Ans: superheat
heat can travel by
Ans: conduction, convection, radiation
the movement a heat by the way of a fluid or air is called
Ans: convection
the movement of heat by direct contact is called
Ans: conduction
the standard unit for measuring the quantity of heat in a substance is
Pretest - Stuvia US
,2
Ans: the british thermal unit
a refrigerant gives up heat when
Ans: it condenses
it is desirable for refrigerant in the suction line to be slighlty superheat in order
to
Ans: insure liquid refrigerant does not enter the compressor
the state of the refrigerant in the suction line should be
Ans: low pressure/ low temperature vapor
the state of the refrigerant entering the condenser is
Ans: high pressure/ highly superheated vapor
the evaporator
Ans: transfers heat from the refrigerated space to the refrigerant
thermodynamic properties of refrigerants
Ans: critical point, enthalpy, and saturation point
the sequential order of steps in the vapor- compression process are
Ans: compression, condensation, expansion, and vaporization
Pretest - Stuvia US
, 3
If a 30 pound cylinder of reclaimed R410A refrigerant has been stored over
night at 70 degrees, the pressure in the cylinder should be approx
Ans: 201 psig
Zero psia is
Ans: A pressure which cannot be further reduced
Zero psig is
Ans: the same as atmospheric pressure
the temperature at which moisture will start to condense from the air is
called
Ans: dew point temperature
a compound pressure gauge measures
Ans: pressure and vacuum
the main function of the condenser is to
Ans: remove heat from the refrigerant
the heat removed from the refrigerant by the condenser is
Ans: both sensible and latent heat
in the evaporator
Pretest - Stuvia US
