D:-None of these
Correct Answer:- Option-B

Question78:- method is used to detect leaksin Refrigeration system.
A:-Observation
B:-Soap Bubble
C:-Water tank dipping
D:-All of these

Correct Answer:- Option-D
Question79:-Finand tube type evaporator is used in
A:-Window AC
B:-Package AC
C:-Split AC
D:-All of these
Correct Answer:- Option-D
Question80:-Direct Cool Refrigerator is also called as
A:-Conventional type Refrigerator
B:-Frost free Refrigerator
C:-Non-frost Refrigerator
D:-None of these
Correct Answer:- Option-A
Question81:-The safest chemical to use for descaling is
A:-Sulphuric acid
uted HCI
C:-Diluted Nitric acid
D:-Bleaching powder
Correct Answer:- Option-B
Question82:-The purpose of air filter in air conditioning system is
A:-To remove dust and dirt from air
B:-To remove dust from refrigerant
C:-To remove humidity from air
D:-To remove air from A/C space
Correct Answer:- Option-A
Question83:-In hot gas by pass method of capacity control of compressor, the hot compressed gas is
A:-By passed back to liquid line
B:-By passed back to suction line
C:-By passed back to evaporator line
D:-By passed back to liquid receiver
Correct Answer:- Option-B
Question84:-The capacity of refrigerator is expressed in
കഷ്ട
B:-Tons of Refrigeration
C:k Cal/TR
D:-None of these
Correct Answer:- Option-A
Question85:-Tap used to avoid water wastage is
A:-Push tap
B:-Ball tap
C:-Lever type tap
D:-Regulating ‏مقا‎
‎Correct Answer:- Option-A
Question86:-Floor level of water cooler to be checked by
A:-Measuring scale
B:-Viewing perpendicularly
C:-Using spirit level
D:-Using tube level
Correct Answer:- Option-C
Question87:-Dead nut is used in Refrigeration flare fittings
A:-For closing a connection end
B:-For controlling a line