Mechanical Engineering MCQs

Page No. 118

Klein’s construction can be used to determine acceleration of various parts when the crank is at_________________?


ainner dead centre


bouter dead centre


cright angles to the link of the stroke


dall of the above


View Answer all of the above

Corioli’s component is encountered in_________________?


aquick return mechanism of shaper


bfour bar chain mechanism


cslider crank mechanism


dA. and C. above



The magnitude of tangential acceleration is equal to____________________?


avelocity2 x crank radius


bvelocityvcrankradius


c(velocity/crankradius)


dvelocity x crank radius2


View Answer velocityvcrankradius

The direction of Corioli’s component of acceleration is the direction _____________________?


aof relative velocity vector for the two coincident points rotated by 90° in the direction of the angular velocity of the rotation of the link


balong the centripetal acceleration


calong tangential acceleration


dalong perpendicular to angular velocity



Angular acceleration of a link can be determined by dividing the___________________?


acentripetal component of acceleration with length of link


btangential component of acceleration with length of link


cresultant acceleration with length of link


dall of the above



In a rigid link OA, velocity of A w.r.t. will be___________________?


aparallel to OA


bperpendicular to OA


cat 45° to OA


dalong AO


View Answer perpendicular to OA

The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line________________?


ajoining the corresponding points


bperpendicular to line as per A.


cnot possible to determine with these data


dat 45° to line as per A.



The number of links and instantaneous centers in a reciprocating engine mechanism are ___________________?


a4, 4


b4, 5


c5, 4


d4, 6


View Answer 4, 6

Which is the false statement about the properties of instantaneous center____________________?


aat the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered


bthe two rigid links have no linear velocities relative to each other at the instantaneous centre


cthe two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link


dthe double centre can be denoted either by 02 or Ol2, but proper selection should be made



If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be_______________?


aless


bmore


csame


ddata are insufficient to determine same


View Answer less

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