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Study MCQ
Refrigeration and Air Conditioning Technician
CENTRAL AIR CONDITIONING
Set 4
Set 4
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Q9781
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What is the purpose of cooling tower in central AC plant?
A
Cool the chilled water
B
Maintain refrigerant flow
C
Cool the liquid refrigerant
D
Cool the condenser water
Q9782
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Which part of water pump becomes worn out fast?
A
Bearing
B
Impeller
C
Water seal
D
Shaft sleeve
Q9783
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What is the preventive maintenance of cooling tower sump?
A
Remove sludge
B
Flush with water
C
Add HCL to water
D
Add bleaching powder
Q9784
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Which suction line pressure ensures that the compressor is to be stopped during pump down operation?
A
3 kg/cm<sup>2</sup>
B
5 kg/cm<sup>2</sup>
C
0.5 kg/cm<sup>2</sup>
D
(- 0.5 kg/cm<sup>2</sup>)
Q9785
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Which device is used to measure the static and total pressure of air in ducting systems?
A
Pitot tube
B
Gauge manifold
C
Pressure gauge
D
Compound gauge
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