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.Management Sciences
Category: Mechanical Engineering Mcqs
Forces are called concurrent when their lines of action meet in________________?
A. one point
B. two points
C. plane
D. perpendicular planes
E. different planes
If the surface of liquid is convex, men ___________________?
A. cohesion pressure is negligible
B. cohesion pressure is decreased
C. cohesion pressure is increased
D. there is no cohesion pressure
E. none of the above
Vapor compression refrigeration is some what like ____________________?
A. Carnot cycle
B. Rankine cycle
C. reversed Camot cycle
D. reversed Rankine cycle
E. none of the above
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
E. before entering the compressor
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
E. expansion valve.
The higher temperature in vapour compression cycle occurs at____________________?
A. receiver
B. expansion valve
C. evaporator
D. condenser discharge
E. compressor discharge
Falling drops of water become spheres due to the property of ____________________?
A. adhesion
B. cohesion
C. surface tension
D. viscosity
E. compressibility
Pick up the wrong statement Nickel and chromium in steel help in _________________?
A. providing corrosion resistance
B. improving machining properties
C. providing high strength at elevated temperatures
D. raising the elastic limit
E. improving the resilience and ductility
For water, at pressures below atmospheric___________________?
A. melting point rises slightly and boiling point drops markedly
B. melting point rises markedly and boiling point drops markedly
C. melting point drops slightly and boiling point drops markedly
D. melting point drops slightly and boiling point drops slightly
E. none of the above
U238 will undergo fission by_________________?
A. high energy (fast) neutrons alone
B. low energy (slow) neutrons alone
C. either fast or slow neutrons
D. medium energy neutrons
E. none of the above
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