Mechanical Engineering MCQs

Page No. 86

A tapered key which fits in a keyway in the hub and is flat on the shaft, is known as___________________?


awood-ruff key


bfeather key


cflat saddle key


dgib head key


View Answer flat saddle key

Turn buckle has____________________?


aright hand threads on bout ends


bleft hand threads on both ends


cleft hand threads on one end and right hand threads on other end


dno threads



Elastic nut is a locking device in which__________________?


aone small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming


ba slot is cut partly in middle of nut and then slot reduced by tightening a screw


chard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip


dthrough 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



If threads on a bolt are left hand, threads on nut will be_____________________?


aright hand with same pitch


bleft hand with same pitch


ccould be left or right hand


dright hand with fine pitch



Applications in which stresses are encountered in one direction only uses following type of threads____________________?


ametric


bbuttress


cacme


dsquare


View Answer buttress

A bench vice has following type of threads____________________?


ametric


bsquare


cbuttress


dacme


View Answer acme

Split nut is a locking device in which_________________?


aone smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming


ba slot is cut partly in middle of nut and then slot reduced by tightening screw


ca 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


dthrough 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 the other end



The function of cutting oil when threading a pipe is to___________________?


aprovide cooling action


blubricate the dies


chelp remove chips


dall of the above


View Answer all of the above

For tight leakage joints, following type of thread is best suited ____________________?


ametric


bbuttress


csquare


dNPT (national pipe threads)



A tube has the following advantage over pipe_________________?


alighter and easier to handle


bgreater shock absorption


csmoother inside walls


dall of the above


View Answer all of the above

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