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.Management Sciences
Category: Mechanical Engineering Mcqs
The ratio of endurance limit in shear to the endurance limit in flexure is__________________________?
A. 0.33
B. 0.4
C. 0.5
D. 0.55
E. 0.6
The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be________________?
A. 28
B. 8/2
C. 48
D. 8/4
E. none of the above
For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimidstroke respectively, is__________________?
A. maximum and zero
B. zero and maximum
C. minimum and maximum
D. zero and minimum
E. maximum and minimum
A perpetual motion machine is___________________?
A. a thermodynamic machine
B. a non-thermodynamic machine
C. a hypothetical machine
D. a hypothetical machine whose opera-tion would violate the laws of thermodynamics
E. an inefficient machine
The nuclear power plant at Tarapur has the following reactor________________?
A. fast breeder
B. pressurised water
C. boiling water
D. sodium graphite
E. none of the above
The energy of molecular motion appears as________________?
A. heat
B. potential energy
C. surface tension
D. friction
E. increase in pressure
In a static fluid ___________________?
A. resistance to shear stress is small
B. fluid pressure is zero
C. linear deformation is small
D. only normal stresses can exist
E. viscosity is nil
The pressure ratio of an ideal vaned compressor with increase in mass flow rate_________________?
A. increases
B. decreases
C. remains constant
D. first decreases and then increases
E. unpredictable
The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to _________________?
A. Wtan(a + )
B. Wtan(a-)
C. Wcos(a + )
D. Wsin(a + )
E. W (sin a + cos ).
The water tubes in a babcock and wilcox boiler are__________________?
A. horizontal
B. vertical
C. inclined
D. horizontal and inclined
E. vertical and inclined
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