Machine Design MCQ Questions Answers – Mechanical Engineering
1) For a cotter, the ratio thickness to width is
a) 1 : 4
b) 1 :3
c) 2 : 3
d) 1 : 2
2)In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to
(A) d
(B) 1.25 d
(C) 1.5 d
(D) 1.75 d
3) The draw in a cotter should not be more than
a) 1 mm
b) 3 mm
c) 6 mm
d) 8 mm
4)Transverse fillet welded joints are designed for
(A) Tensile strength
(B) Compressive strength
(C) Shear strength
(D) Bending strength
5) The factor of safety for steel and for steady load is
a) 2
b) 4
c) 6
d) 8
6)Buttress threads are usually found on
(A) Screw cutting lathes
(B) Feed mechanisms
(C) Spindles of bench vices
(D) Railway carriage couplings
7) The fatigue life of a part can be improved by
a) heat treatment
b) hot working
c) shot peening
d) electro-plating
8)Other method of reducing shock load in the above case can be
(a) to decrease length
(b) to increase length
(c) unaffected by length
(d) other factors would decide same
(e) none of the above.
Ans: b
9) Which of the following process is not adopted for increasing the fatigue strength of a material ?
a) cold working
b) hot working
c) shot peening
d) better surface finish
10)The fatigue life of a part can be improved by
(a) electroplating
(b) polishing
(c) coating
(d) shot peening
(e) heat treating.