A. Evaporator
B. Driers
C. Expansion valve
D. Dehumidifier
Ans-: B
Q.2 One tone of refrigeration is equal to ___.( In SI unit )
A. 100 kJ / min
B. 840 kJ / min
C. 240 kJ / min
D. 420 kJ / min
Ans -: C
Q.3 The coefficient of performance of a domestic refrigerator is ___ .
A. Less than 1
B. Equal to 1
C. Zero
D. More than 1
Ans -: D
Q.4 Air refrigeration cycle is used in ____ .
A. Commercial refrigerator
B. Air-conditioning
C. Gas liquefaction
D. Air handling unit
Ans -: C
Q.5 Freezing temperature of ammonia is __.
A. 77.8 °C
B. - 32.5 ° C
C. 89.2 ° C
D. - 77.8 °C
Ans -: D
Q.6 Which of the following is properties of Freon?
A. Colourless
B. Odourless
C. Nontoxic
D. All of these
Ans -: D
Q.7 Freon-22 also known as _____ .
A. CH2ClF2
B. CHClF2
C. Cl2CHF2
D. CFC
Ans -: B
Q.8 Boiling temperature of Freon-22 is __ .
A. - 40 ° C
B. - 50 ° C
C. - 92 ° C
D. - 273.15 ° C
Ans -: A
Q.9 Capillary tube refrigeration system also known as ____ .
A. Automatic expansion system
B. Restrictor system
C. Dry type system
D. Low side float system
Ans -: B
Q.10 Where does the lowest temperature occur in a vapour compression cycle?
A. Receiver
B. Expansion valve
C. Evaporator
D. Condenser
Ans -: C
Q.11 Which is the most suitable refrigerant for a commercial ice plant ?
A. Brine
B. Freon
C. Air
D. NH3
Ans -: D
Q.12 Presence of moisture in a refrigerant affects the working of which unit ?
A. Expansion valve
B. Condenser
C. Compressor
D. Heat exchanger
Ans -: A
Q.13 In freon refrigeration plant , the condenser and evaporator tubes are made of ____ .
A. Steel
B. Brass
C. Copper
D. Aluminium
Ans -: C
Q.14 Air is dehumidified by which process?
A. Heating
B. Cooling
C. Chemical absorption
D. B + C
Ans -: D
Q.15 Air is normally dehumidified by ____ .
A. Injecting water
B. Cooling
C. Heating
D. Superheating
Ans -: B
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