ESCO Air Conditioning Exam || with A+ Guaranteed Solutions.
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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 answers Sensible heat
Heat added to a substance without a rise in temperature correct answers Latent heat
Heat added to the refrigerant in a vapor state after the evaporation process is called correct answers Superheat...
ESCO Air Conditioning Exam || with A+ Guaranteed Solutions.
Heat which causes a change in temperature of a substance is called correct answers Sensible heat
Heat added to a substance without a rise in temperature correct answers Latent heat
Heat added to the refrigerant in a vapor state after the evaporation process is called correct answers Superheat
Scroll compressor move refrigerant by correct answers Involute Spirals
The movement of heat by way of fluid is called correct answers Convection
The movement of heat by direct contact is correct answers Conduction
The standard unit for measuring the quantity of heat in a substance is correct answers BTUs
Refrigerant gives up heat when correct answers It condenses
Why must refrigerant in the suction line be slightly warmer than the saturation temperature? correct answers Prevent liquid slugging of the compressor
The state of the refrigerant in the suction line should be correct answers Low pressure / Low temperature vapor
The state of the refrigerant entering the condenser is correct answers High pressure / Highly superheated vapor
The evaporator correct answers Transfers heat from the refrigerated space to the refrigerant
Which of the following is not a thermodynamic property of refrigerants correct answers Flammability
The sequential order of steps in the vapor compressions process are correct answers 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 answers 201 psig
Fan airflow pressures are usually measured in correct answers Inches of water column
0 pounds per square inch absolute is correct answers A pressure which cannot be further reduced
0 pounds per square inch gauge is correct answers The same as atmospheric pressure The temperature at which moisture will start to condense from the air is called correct answers Dew point temperature
A compound pressure gauge measures correct answers Pressure and vacuum
Mechanical shaft seal is necessary on a correct answers Open drive compressor
Liquid slugging is correct answers Liquid refrigerant in the compressor clearance space
The clearance space in reciprocating compressor correct answers Has an effect on compressor capacity
Which of the following types of air conditioning compressor is most energy-efficient correct answers Scroll
Which of the following represent the right order for the functions of a condenser correct answers 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 answers 87 psig
There are three basic types of condensers, air-cooled, water-cooled and the _____________ cooled correct answers 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 answers 100°F
The heat removed from the refrigerant by the condenser is correct answers Both sensible and latent heat.
An energy recovery ventilator is correct answers an air to air heat exchanger to recover heat
When testing the efficiency of an air-cooled condenser, the refrigerant condensing temperature should be approximately ________ higher than the entering air temperature correct answers 30°F
When testing the efficiency of a water-cooled condenser, the refrigerant condensing temperature should be approximately _________ higher than the leaving water temperature correct answers 10°F
The first function condenser must perform is to correct answers De-superheat
A thermostatic expansion valve is designed to maintain correct answers Constant evaporator superheat
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