ESCO Air Conditioning Exam Guide Questions and Answers UPDATED
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Course
ESCO Air Conditioning
Institution
ESCO Air Conditioning
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...
ESCO Air Conditioning Exam Guide
Questions and Answers UPDATED 2024-
2025
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
ESCO Air Conditioning Exam|2024-2025
, ESCO Air Conditioning Exam|2024-2025
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
10 pounds of refrigerant passing through a water cooled condenser will lose 20 BTUs of
heat per pound. If 10 pounds of water passes through the condenser with an entering
temperature of 80°F the temperature of the water leaving the condenser is -Correct
Answer ✔100°F
ESCO Air Conditioning Exam|2024-2025
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