Mechanical Engineering MCQs

Page No. 115

In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is________________________?


a95 mm


bslightly less than 95 mm


cslightly more than 95 mm


d45 mm



Inertia force acts___________________?


aperpendicular to the accel< force


balong the direction of accel* force


copposite to the direction of ace ing force


din any direction w.r.t. accel* force depending on the magnit two



In S.H.M., acceleration is proportional to _________________?


avelocity


bdisplacement


crate of change of velocity


dall of the above


View Answer displacement

In S.H.M., the velocity vector w.r.t. displacement vector _________________?


aleads by 90°


blags by 90°


cleads by 180°


dare in phase


View Answer leads by 90°

Polar moment of inertia (IP) of ac disc is to ht determined by suspen by a wire and noting the frequei oscillations (f) ?


aIpocf


bIpocf


cIp oc j


dIpoc-


View Answer Ip oc j

The Bifilar suspension method is used to determine__________________?


anatural frequency of vibration


bposition of balancing weights


cmoment of inertia


dcentripetal acceleration’


View Answer moment of inertia

Instantaneous center of rotation of a link in a four bar mechanism lies on _______________?


aright side pivot of this link


blift side pivot of this link


ca point obtained by intersection on extending adjoining links


dcan’t occur



According to Kennedy’s theorem, if three bodies have plane motions, their instantaneous centers lie on___________________?


aa triangle


ba point


ctwo lines


da straight line


View Answer a straight line

Two systems shall be dynamically equivalent when____________________?


athe mass of two are same


be.g. of two coincides


cM.I. of two about an axis through e.g. is equal


dall of the above


View Answer all of the above

The absolute acceleration of any point P in a link about center of rotation 0 is___________________?


aalong PO


bperpendicular to PO


cat 45° to PO


dnone of the above


View Answer none of the above

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