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

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bouter dead centre

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cright angles to the link of the stroke

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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

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cslider crank mechanism

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dA. and C. above

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The magnitude of tangential acceleration is equal to____________________?


avelocity2 x crank radius

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bvelocityvcrankradius

✓


c(velocity/crankradius)

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dvelocity x crank radius2

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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

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calong tangential acceleration

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dalong perpendicular to angular velocity

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


acentripetal component of acceleration with length of link

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btangential component of acceleration with length of link

✓


cresultant acceleration with length of link

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dall of the above

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


aparallel to OA

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bperpendicular to OA

✓


cat 45° to OA

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dalong AO

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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.

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cnot possible to determine with these data

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dat 45° to line as per A.

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


a4, 4

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b4, 5

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c5, 4

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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

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

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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

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

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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

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csame

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ddata are insufficient to determine same

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View Answer less

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