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.Management Sciences
Category: Mechanical Engineering Mcqs
The C.G. of a solid hemisphere lies on the central radius 3r_________________?
A. at distance — from the plane base 3r
B. at distance — from the plane base 3r
C. at distance — from the plane base 3r
D. at distance — from the plane base or
E. at distance — from the plane base
Sulphur in steel________________?
A. acts as deoxidiser
B. reduces the grain size
C. decreases tensile strength and hardness
D. lowers the toughness and transverse ductility
E. increases hardness
Aqua ammonia is used as refrigerant in the following type of refrigeration system_________________?
A. compression
B. direct
C. indirect
D. absorption
E. none of the above
Modulus of rigidity is defined as the ratio of_________________?
A. longitudinal stress and longitudinal strain
B. volumetric stress and volumetric strain
C. lateral stress and lateral strain
D. shear stress and shear strain
E. linear stress and lateral strain
The tensile strength of wrought iron is maximum _________________?
A. along the lines of slag distribution
B. perpendicular to lines of slag distribution
C. uniform in all directions
D. unpredictable
E. none of the above
The energy distribution of an ideal reflector at higher temperatures is largely in the range of ___________________?
A. shorter wavelength
B. longer wavelength
C. remains same at all wavelengths
D. wavelength has nothing to do with it
E. none of the above
Minimum work in compressor is possible when the value of adiabatic index n is equal to_________________?
A. 0.75
B. 1
C. 1.27
D. 1.35
E. 2
The function of a washer is to___________________?
A. provide cushioning effect
B. provide bearing area
C. absorb shocks and vibrations
D. provide smooth surface in place of rough surface
E. act as a locking device
Activity s,lack or float of any event on a PERT/CPM chart is represented by__________________?
A. latest start time of succeeding event -earliest finish time of preceding event activity time
B. latest start time of the event – earliest start time of the event
C. latest finish time of event – earliest finish time of the event
D. anyone of the above
E. none of the above
Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of_______________?
A. 39.2%
B. 49.2%
C. 68.8%
D. 84.8%
E. 91.6%.
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