ESCO Air Conditioning
Exam Tested Questions With
Revised Answers
The state of the refrigerant in the suction line should be -
ANSWER Low pressure / Low temperature vapor
The movement of heat by direct contact is - ANSWER
Conduction
The standard unit for measuring the quantity of heat in a
substance is - ANSWER BTUs
Refrigerant gives up heat when - ANSWER It condenses
The state of the refrigerant entering the condenser is -
ANSWER High pressure / Highly superheated vapor
The evaporator - ANSWER Transfers heat from the
refrigerated space to the refrigerant
, Which of the following is not a thermodynamic property of
refrigerants - ANSWER Flammability
The sequential order of steps in the vapor compressions
process are - 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 - ANSWER 201 psig
Fan airflow pressures are usually measured in - ANSWER
Inches of water column
0 pounds per square inch absolute is - ANSWER A pressure
which cannot be further reduced
0 pounds per square inch gauge is - ANSWER The same as
atmospheric pressure
, The temperature at which moisture will start to condense from
the air is called - ANSWER Dew point temperature
A compound pressure gauge measures - ANSWER Pressure
and vacuum
Mechanical shaft seal is necessary on a - ANSWER Open
drive compressor
Liquid slugging is - ANSWER Liquid refrigerant in the
compressor clearance space
The clearance space in reciprocating compressor - ANSWER
Has an effect on compressor capacity
Which of the following types of air conditioning compressor is
most energy-efficient - ANSWER Scroll
Which of the following represent the right order for the
functions of a condenser - ANSWER De-superheat,
Condenses, Subcools
Exam Tested Questions With
Revised Answers
The state of the refrigerant in the suction line should be -
ANSWER Low pressure / Low temperature vapor
The movement of heat by direct contact is - ANSWER
Conduction
The standard unit for measuring the quantity of heat in a
substance is - ANSWER BTUs
Refrigerant gives up heat when - ANSWER It condenses
The state of the refrigerant entering the condenser is -
ANSWER High pressure / Highly superheated vapor
The evaporator - ANSWER Transfers heat from the
refrigerated space to the refrigerant
, Which of the following is not a thermodynamic property of
refrigerants - ANSWER Flammability
The sequential order of steps in the vapor compressions
process are - 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 - ANSWER 201 psig
Fan airflow pressures are usually measured in - ANSWER
Inches of water column
0 pounds per square inch absolute is - ANSWER A pressure
which cannot be further reduced
0 pounds per square inch gauge is - ANSWER The same as
atmospheric pressure
, The temperature at which moisture will start to condense from
the air is called - ANSWER Dew point temperature
A compound pressure gauge measures - ANSWER Pressure
and vacuum
Mechanical shaft seal is necessary on a - ANSWER Open
drive compressor
Liquid slugging is - ANSWER Liquid refrigerant in the
compressor clearance space
The clearance space in reciprocating compressor - ANSWER
Has an effect on compressor capacity
Which of the following types of air conditioning compressor is
most energy-efficient - ANSWER Scroll
Which of the following represent the right order for the
functions of a condenser - ANSWER De-superheat,
Condenses, Subcools
