The domestic refrigerator uses following type of compressor ____________________?
(A) centrifugal
(B) axial
(C) miniature sealed unit
(D) piston type reciprocating
(D) none of the above
Domestic refrigerator working on vapour compression cycle uses the following type of expansion device____________________?
(A) electrically operated throttling valve
(B) manually operated valve
(C) thermostatic valve
(D) capillary tube
(D) expansion valve.
Presence of moisture in a refrigerant affects the working of___________________?
(A) compressor
(B) condenser
(C) evaparator
(D) expansion valve
(D) heat transfer
The COP of a domestic refrigerator___________________?
(A) is less than 1
(B) is more than 1
(C) is equal to 1
(D) depends upon the make
(D) depends upon the weather conditions
Critical temperature is’ the temperature above which _____________________?
(A) a gas will never liquefy
(B) a gas will immediately liquefy
(C) water will evaporate
(D) water will never evaporate
(D) none of the above
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice_________________?
(A) in 1 hour
(B) in 1 minute
(C) in 24 hours
(D) in 12 hours
(D) in 10 hours
In vapour compression cycle the condition of refrigerant is superheated vapour _____________________?
(A) after passing through the condenser
(B) before passing through the condenser
(C) after passing through the expansion or throttle valve
(D) before [entering the expansion valve
(D) before entering the compressor
A standard ice point temperature corresponds to the temperature of ___________________?
(A) water at 0°C
(B) ice at – 4°C
(C) solid and dry ice
(D) mixture of ice, water and vapour under equilibrium conditions under NTP conditions
(D) mixture of ice and water Under equilibrium conditions
One ton refrigeratiqn corresponds to_________________?
(A) 50 kcal/min
(B) 50 kcal/kr
(C) 80 kcal/min
(D) 80 kcal/hr
(D) 1000 kcal/day
In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is_____________________?
(A) less than 2 kg
(B) more than or equal to 3.65 kg
(C) more than 10 kg
(D) there is no such consideration
(D) pone of the above