Mechanical Engineering MCQs

Page No. 128

Pitch point on a cam is_________________?


aany point on pitch curve


bthe point on cam pitch curve having the maximum pressure angle


cany point on pitch circle


dthe point on cam pitch curve having the minimum pressure angle



A universal joint is an example of_____________________?


ahigher pair


blower pair


crolling pair


dsliding pair


View Answer lower pair

The example of lower pair is_______________?


ashaft revolving in a bearing


bstraight line motion mechanisms


cautomobile steering gear


dall of the above


View Answer all of the above

Which of the following is a lower pair_______________?


aball and socket i


bpiston and cylinder


ccam and follower


dA. and B. above


View Answer A. and B. above

Hooke’s law holds good up to____________________?


ayield point


blimit of proportionality


cbreaking point


delastic limit



The unit of Young’s modulus is__________________?


amm/mm


bkg/cm


ckg


dkg/cm2


View Answer kg/cm2

It equal and opposite forces applied to a body tend to elongate it, the stress so produced is called______________________?


ainternal resistanpe


btensile stress


ctransverse stress


dcompressive stress


View Answer tensile stress

Modulus of rigidity is defined as the ratio of_________________?


alongitudinal stress and longitudinal strain


bvolumetric stress and volumetric strain


clateral stress and lateral strain


dshear stress and shear strain



The ultimate tensile stress of mild steel compared to ultimate compressive stress is__________________?


asame


bmore


cless


dmore or less depending on other factors


View Answer more

A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under_________________?


auniform throughout


bincrease uniformly


cfirst increase and then decrease


dincrease uniformly first and then increase rapidly



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