ESCO Air Conditioning Exam Questions
And Answers 100% Verified.
Heat which causes a change in temperature of a substance is called - correct answer.
Sensible heat
Heat added to a substance without a rise in temperature - correct answer. Latent heat
Heat added to the refrigerant in a vapor state after the evaporation process is called -
correct answer. Superheat
Scroll compressor move refrigerant by - correct answer. Involute Spirals
The movement of heat by way of fluid is called - correct answer. Convection
The movement of heat by direct contact is - correct answer. Conduction
The standard unit for measuring the quantity of heat in a substance is - correct answer.
BTUs
Refrigerant gives up heat when - correct answer. It condenses
Why must refrigerant in the suction line be slightly warmer than the saturation
temperature? - correct answer. Prevent liquid slugging of the compressor
The state of the refrigerant in the suction line should be - correct answer. Low
pressure / Low temperature vapor
The state of the refrigerant entering the condenser is - correct answer. High pressure /
Highly superheated vapor
The evaporator - correct answer. Transfers heat from the refrigerated space to the
refrigerant
, Which of the following is not a thermodynamic property of refrigerants - correct answer.
Flammability
The sequential order of steps in the vapor compressions process are - correct answer.
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 - correct answer. 201 psig
Fan airflow pressures are usually measured in - correct answer. Inches of water
column
0 pounds per square inch absolute is - correct answer. A pressure which cannot be
further reduced
0 pounds per square inch gauge is - correct answer. The same as atmospheric
pressure
The temperature at which moisture will start to condense from the air is called - correct
answer. Dew point temperature
A compound pressure gauge measures - correct answer. Pressure and vacuum
Mechanical shaft seal is necessary on a - correct answer. Open drive compressor
Liquid slugging is - correct answer. Liquid refrigerant in the compressor clearance
space
The clearance space in reciprocating compressor - correct answer. Has an effect on
compressor capacity
Which of the following types of air conditioning compressor is most energy-efficient -
correct answer. Scroll
Which of the following represent the right order for the functions of a condenser - correct
answer. De-superheat, Condenses, Subcools
Refrigerant R 134a vapor enters the condenser at 124 psi G, 100°F. it leaves as a liquid
from the condenser subcooled 20°F and the pressure will be approximately - correct
answer. 87 psig
There are three basic types of condensers, air-cooled, water-cooled and the
_____________ cooled - correct answer. Evaporative
And Answers 100% Verified.
Heat which causes a change in temperature of a substance is called - correct answer.
Sensible heat
Heat added to a substance without a rise in temperature - correct answer. Latent heat
Heat added to the refrigerant in a vapor state after the evaporation process is called -
correct answer. Superheat
Scroll compressor move refrigerant by - correct answer. Involute Spirals
The movement of heat by way of fluid is called - correct answer. Convection
The movement of heat by direct contact is - correct answer. Conduction
The standard unit for measuring the quantity of heat in a substance is - correct answer.
BTUs
Refrigerant gives up heat when - correct answer. It condenses
Why must refrigerant in the suction line be slightly warmer than the saturation
temperature? - correct answer. Prevent liquid slugging of the compressor
The state of the refrigerant in the suction line should be - correct answer. Low
pressure / Low temperature vapor
The state of the refrigerant entering the condenser is - correct answer. High pressure /
Highly superheated vapor
The evaporator - correct answer. Transfers heat from the refrigerated space to the
refrigerant
, Which of the following is not a thermodynamic property of refrigerants - correct answer.
Flammability
The sequential order of steps in the vapor compressions process are - correct answer.
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 - correct answer. 201 psig
Fan airflow pressures are usually measured in - correct answer. Inches of water
column
0 pounds per square inch absolute is - correct answer. A pressure which cannot be
further reduced
0 pounds per square inch gauge is - correct answer. The same as atmospheric
pressure
The temperature at which moisture will start to condense from the air is called - correct
answer. Dew point temperature
A compound pressure gauge measures - correct answer. Pressure and vacuum
Mechanical shaft seal is necessary on a - correct answer. Open drive compressor
Liquid slugging is - correct answer. Liquid refrigerant in the compressor clearance
space
The clearance space in reciprocating compressor - correct answer. Has an effect on
compressor capacity
Which of the following types of air conditioning compressor is most energy-efficient -
correct answer. Scroll
Which of the following represent the right order for the functions of a condenser - correct
answer. De-superheat, Condenses, Subcools
Refrigerant R 134a vapor enters the condenser at 124 psi G, 100°F. it leaves as a liquid
from the condenser subcooled 20°F and the pressure will be approximately - correct
answer. 87 psig
There are three basic types of condensers, air-cooled, water-cooled and the
_____________ cooled - correct answer. Evaporative
