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Engineering :: Machine Design


361.  The bursting pressure of 12 mm ID, 14 mm OD seamless cartridge brass tubing having ultimate whear stress of 225 Mpa, will be nearly
A. 10 Kpa B. 20 Kpa
C. 30 Kpa D. 40 Kpa

362.  A 3 mm diameter rivet must be squeezed to form a head. When yield stress in tension for this alloy is 125 Kpa, the minimum value of initiating force must be not less than
A. 100 N B. 500 N
C. 1000 N D. 5000 N

363.  In a shaft fibre orientation in the direction of prevailing stress can be obtained by
A. casting B. annealing
C. forging D. tumbling

364.  The piston of a double acting reciprocating steam engine is subjected to
A. fully reversed stresses B. partly reversed stresses
C. repeated stresses D. none of the above

365.  The piston of a internal combustion engine is subjected to
A. fully reversed stresses B. partly reversed stresses
C. repeated stresses D. partly repeated stresses

366.  A solderberg line for ductile material gives upper limit for
A. mean stress B. alternating compressive stress
C. alternating tensile stress D. any combination of mean and alternating stresses

367.  Gerber line for failure criteria is in the form of a
A. straight line with negative slope B. straight line with positive slope
C. parabola D. hyperbola

368.  Both Soderberg and Gerber criteria for failure theories are overly conservative
A. near the left end of the curves B. near the right end of the curves
C. near the middle of the curves D. near the left as well as right ends of the curve

369.  Auto frettage is a
A. surface coating process B. a means of inducing favourable residual stresses in pressure vessels
C. extra cover provided on seamless pipes to increase their hoop stress D. a heat treatment for pressure vessels subjected to low temperatures

370.  Shot peening leaves the material surface in
A. residual tensile stress B. residual shear stress
C. residual compressive stress D. All of the above




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