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Study MCQ
Refrigeration and Air Conditioning Technician
MULTI SPLIT AC AND CAR AIR CONDITIONING
Set 15
Set 15
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Q10189
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What is the effect of operating the compressor under 5 of Hg vacuum during pump down process?
A
Pumps oil to condenser
B
Prevent motor damage in dome
C
Prevent leakage in service valve
D
Prevent piston damage
Q10190
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What is ensured before mounting condenser in car AC?
A
Accessibility for future service
B
Condenser top line to TEV inlet
C
Condenser in line with car radiator
D
Condenser bottom line to discharge line
Q10191
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Why CFC 12 system is replaced by HFC 134a system in car AC?
A
Increase ODP
B
Increase GWP
C
GWP becomes zero
D
ODP becomes zero
Q10192
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What is the cause of water leakage in indoor unit of multi split AC?
A
Efficient water pump
B
Drain line not properly installed
C
Condenser water pump defective
D
Over flow of water from cooling tower sump
Q10193
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What is the reason for no cooling effect in car AC?
A
Air in the system
B
Excess of refrigerant
C
Refrigerant leaked
D
Moisture in the system
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