Mechanical Engineering MCQs

Page No. 114

Higher pairs are those which have_________________?


apoint or line contact between the two elements when in motion


bsurface contact between the two ele-ments when in motion


celements of pairs not held together mechanically


dtwo elements that permit relative motion



A cam with a roller follower would con stitute following type of pair______________?


alower pair


bhigher pair


copen pair


dclose pair


View Answer higher pair

“Open pairs are those which have__________________?


apoint or line contact between the two elements when in motion


bsurface contact between the two ele-ments when in motion


celements of pairs not held together mechanically


dtwo elements that permit relative motion



Hart mechanism has________________?


aeight links


bsix links


cfour links


dtwelve links


View Answer six links

The main disadvantage of the sliding pair is that it is_________________?


abulky


bwears rapidly


cdifficult to manufacture


dA. and B. above


View Answer A. and B. above

An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has___________________?


a2 links


b3 links


c4 links


d5 links


View Answer 4 links

In its simplest form, a cam mechanism consists of following number of links___________________?


a1


b3


c3


d4


View Answer 3

In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links_________________?


awill remain same


bwill change


ccould change or remain unaltered depending oh which link is fixed


dwill not occur


View Answer will remain same

In a darg link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is _______________?


aequal to sum of other two


bgreater than sum of other two


cless than sum of other two


dthere is no such relationship



Kinematic pairs are those which have___________________?


atwo elements held together mechani-cally


btwo elements having relative motion


ctwo elements having Coroili’s com-ponent


dminimum of two instantaneous centres



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