Mechanical Engineering MCQs

Page No. 123

the chain is constrained when_________________?


aL.H.S. = R.H.S.

✓


bL.H.S. R.H.S.

✖


cthere is no such criterion for checking above requirement

✖


dnone of the above

✖


View Answer L.H.S. = R.H.S.

The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is______________________?


aflexible coupling

✖


buniversal coupling

✓


cchain coupling

✖


dOldham’s coupling

✖


View Answer universal coupling

Flexible coupling is used because _____________________?


ait is easy to disassemble

✖


bit is easy to engage and disengage

✖


cit transmits shocks gradually

✖


dit prevents shock transmission and eliminates stress reversals

✓



The e.g. of a link in any mechanism would experience_________________?


ano acceleration

✖


blinear acceleration

✖


cangular acceleration

✖


dboth angular and linear accelerations

✓



The Hooke’s joint consists of ____________________?


atwo forks

✓


bone fork

✖


cthree forks

✖


dfour forks

✖


View Answer two forks

In elliptical trammels_________________?


aall four pairs are turning

✖


bthree pairs turning and one pair sliding

✖


ctwo pairs turning and two pairs sliding

✓


done pair turning and three pairs sliding

✖



It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by_______________?


auniversal joint

✖


bknuckle joint

✖


cOldham’s coupling

✓


dflexible coupling

✖


View Answer Oldham’s coupling

The Klein’s method of construction for reciprocating engine mechanism _______________?


ais based on acceleration diagram

✖


bis a simplified form of instantaneous center method

✖


cutilises a quadrilateral similar to the diagram of mechanism for reciprocating engine

✓


denables determination of Corioli’s component

✖



With single Hooke’s joint it is possible to connect two shafts, the axes of which have an angular misalignment up to ________________?


a10°

✖


b20°

✖


c30°

✖


d40°

✓


View Answer 40°

The advantage of the piston valve over D-slide valve is that in the former case____________________?


awear is less

✖


bpower absorbed is less

✖


cboth wear and power absorbed are low

✓


dthe pressure developed being high provides tight sealing

✖



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