Mechanical Engineering Mcqs
Clapeyron equation is a relation between___________________?

A. temperature, pressure and enthalpy
B. specific volume and enthalpy
C. temperature and enthalpy
D. temperature, pressure, and specil volume

In vapor compression cycle, the condition of refrigerant is high pressure saturated liquid________________?

A. After passing through the condenser
B. Before passing through the condenser
C. After passing through the expansion or thiottle valve
D. Before entering the expansion valve

The boiling point of ammonia is___________________?

A. -100°c
B. -50°c
C. – 33.3°c
D. 0°c

In S.J. unit, one ton of refrigeration is equal to___________________?

A. 210 kj/min
B. 21 kj/min
C. 420 kj/min
D. 840 kj/min

Allowable pressure on high-pressure side or ammonia absorption system is of the order of_________________?

A. Atmospheric pressure
B. Slightly above atmospheric pressure
C. 2-4 bars
D. 5-6 bars

The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases ____________________ ?

A. Will be higher
B. Will be lower
C. Will remain unaffected
D. May be higher or lower depending upon the nature of non-condensable gases

The moisture in a refrigerant is removed by___________________?

A. Evaporator
B. Safety relief valve
C. Dehumidifier
D. Driers

In vapor compression cycle the condition off refrigerant is dry saturated vapor________________?

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

In vapour compression cycle, the conditii of refrigerant is saturated liquid________________?

A. After passing through the condenser
B. Before passing through the condensei
C. After passing through the expansion throttle valve
D. Before entering the expansion valve