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Question:
_____
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Which of the following compressor is not a positive displacement compressor:
Centrifugal compressor
In cooling towers, total heat transferred is the sum of which of the following:
Heat of evaporation + Sensible heat
Accumulator is located in liquid line of the refrigeration system and helps in preventing liquid flood-back:
False
Sight glass is located in the _____
liquid line
The efficiency and power factor of the motor varies with which of the following:
Both options are correct
The highest Annual Fuel Utilization Efficiency (AFUE) units available are slightly less than _____ efficient:
97%
Which of the is used to smooth out the variations in the power source current:
Inductance
Which of the following pressure is required in the conditioned space to prevent the infiltration of outside air:
Slightly positive
When the voltage given to charged capacitor is removed, capacitor discharges in the _____ to the supply voltage:
Opposite direction
Megger test for motors and wiring is carried out to determine:
Insulation resistance
Excessive liquid line length and/or lift can cause which of the following:
Flash gas in the liquid line
In which of the following boiler water is circulated through the boiler tubes:
Water tube
Boiler efficiency is a function of which of the following parameters:
All the options are correct
Moisture remaining in a system following evacuation:
will be removed by the drier
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