Machine Design Mcqs
Q.1: The designation M 33 x 2 of a bolt means___________________?<
A. metric threads of 33 nos in 2 cm.!
B. metric threads with cross-section of 33 mm*
C. metric threads of 33 mm outside diameter and 2 mm pitch7
D. bolt of 33 mm nominal diameter having 2 threads per cm6
Q.2: Rivets are generally specified by_______________?1
A. thickness of plates to be riveted!
B. length of rivet
C. diameter of head
D. nominal diameter
Q.3: Which of the following is a permanent fastening ?1
A. bolts
B. keys
C. cotters
D. rivets
Q.4: If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to___________________?
A. 0.2
B. 0.25
C. 0.50
D. 0.6
Q.5: 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 slot reduced by tightening a screwQ
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 spitted and bent in reverse direction at other end
Q.6: Buttress threads are usually found on____________________?:
A. screw cutting lathes
B. feed mechanisms
C. spindles of bench vices
D. screw jack
Q.7: A key capable of tilting in a recess milled out in a shaft is known as______________________?]
A. wood-ruff key
B. feather key
C. flat saddle key
D. gib head key
Q.8: A tapered key which fits in a keyway in the hub and is flat on the shaft, is known as___________________?i
A. wood-ruff key
B. feather key
C. flat saddle key
D. gib head key
Q.9: Turn buckle has____________________?$
A. right hand threads on bout ends
B. left hand threads on both ends
C. left hand threads on one end and right hand threads on other end@
D. no threads
Q.10: Elastic nut is a locking device in which__________________?;
A. one small 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 slot reduced by tightening a screwQ
C. hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed 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 pin splitted and bent in reverse direction at other end

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