11.Deformation per unit length in the direction of force is known as
(A) Strain
(B) Stress
(C) Poisson’s ratio
(D) Modulus of elasticity
12.In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is
(1) more
(B) less
(C) same
(D) more/less depending on composition
13.The neutral axis of the cross-section a beam is that axis at which the bending stress is
(A) zero
(B) minimum
(C) maximum
(D) infinity
14.If there are L number of links in a mechanism, then number of possible inversions is equal to
(A) L + 1
(B) L – 1
(C) L
(D) L + 2
15. Automobile steering gear is an example of
(A) higher pair
(B) sliding pair
(C) turning pair
(D) lower pair
16. The fatigue life of a part can be improved by
(A) electroplating
(B) polishing
(C) coating
(D) shot peening
17. The notch angle of the Izod impact test specimen is
(A) 10°
(B) 20°
(C) 30°
(D) 45°
18. In most machine members, the damping capacity of the material should be
(A) low
(B) zero
(C) high
(D) none of these
19. A stud
(A) has a head on one end and a nut fitted to the other
(B) has head at one end and other end fits into a tapped hole in the other part to be joined
(C) has both the ends threaded
(D) requires locking nuts
20. For applications involving high stresses in one direction only the following type of thread
would be best suited
(A) ISO metric thread
(B) acme thread
(C) square thread
(D) buttress thread
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