HVAC Air Condition Esco 2024 Questions And Answers Latest Top Score.
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HVAC Air Condition Esco 2024
Institution
HVAC Air Condition Esco 2024
HVAC Air Condition Esco 2024 Questions And Answers Latest Top Score.
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 is called - correct answer. Latent Heat
Heat added t...
HVAC Air Condition Esco 2024 Questions
And Answers Latest Top Score.
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 is called - correct answer.
Latent Heat
Heat added to refrigerant in a vapor state after the evaporation process is called -
correct answer. Superheat
A scroll compressor moved refrigerant by means of - correct answer. Involute spirals
The movement of heat by way of fluid is called - correct answer. Convection
The movement of heat through a solid object is called - correct answer. Conduction
The standard unit for measuring the quantity of heat in a substance - correct answer.
British Thermal Unit
A refrigerant gives up heat when it - correct answer. Condenses
Why must refrigerant in the suction line be slightly warmer than the saturation
temperature? - correct answer. Prevent liquid slugging of compressor
It is desirable for refrigerant in the suction line to be slightly superheated in order to -
correct answer. Insure liquid refrigerant does not enter the compressor
A mechanical shaft seal is necessary on - correct answer. Semi-hermetic compressor
Liquid slugging is - correct answer. Liquid refrigerant in the compressor clearance
space
The clearance space in a reciprocating compressor - correct answer. Varies
depending on compressor speed
Which of the following types of air conditioning compressors is most energy efficient -
correct answer. Centrifugal
, Which of the following represent the right order for the functions of a condenser? -
correct answer. De-superheat, condenses, sub-cools
Refrigerant R-134a vapor enters the compressor at 124 psig, 100°f. It leaves as a liquid
from the condenser sub-cooled 20°f, and the pressure will approximately - correct
answer. 18.4 psig
There are 3 basic types of condensers, the air cooled, the water cooled, and the
_______ cooled - correct answer. Evaporative
10 lbs. of refrigerant passing through a water cooled condenser will lose 20 BTU's of
heat per lb. If 10 lbs. 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
The heat removed from the refrigerant by the condenser is - correct answer. Both
sensible and latent heat
An energy recovery ventilator is - correct answer. An air to air heat exchanger to
recover heat
Which of the following can NOT be used as a low ambient temperature control? -
correct answer. Crankcase regulating valves
The state of refrigeration in the suction line should be - correct answer. Low pressure/
low temperature vapor
The state of 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 refrigerant - correct answer.
Flammability
The sequential order of steps in the vapor-compression process are - correct answer.
Compression, condensation, expansion, vaporization
If a 30 pound container of R-410A refrigerant has been stored over night at 70°F, 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 (WC)
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