A Best Way To Crack Gorenment Job Exams

Mechanical Engineering Objective Questions { Machine Design }



57. Which of the following is a permanent fastening ?
A.Bolts
B.Keys
C.Cotters
D.Rivets

58. In order to avoid tearing of the plate at edge, the distance from the centre 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

59. If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to
A.0.20
B.0.25
C.0.50
D.0.60

60. Transverse fillet welded joints are designed for
A.Tensile strength
B.Compressive strength
C.Shear strength
D.Bending strength

61. Jam nut is a locking device in which
A.One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B.A slot is cut partly in middle of nut and then skit reduced by tightening a screw
C.A hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
D.Through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter splitted and bent in reverse direction at other end

62. The pitch of threads on a lock nut in comparison to pitch of nut is
A.Same
B.Coarser
C.Finer
D.Very coarse

63. Buttress threads are usually found on
A.Screw cutting lathes
B.Railway carriage couplings
C.Spindles of bench vices
D.Screw jack

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