Mechanical Engineering MCQs

Page No. 22

Alcohol is used in manometer, because____________________?


aits vapour pressure is low


bit provides suitable meniscus for the inclined tube


cits density is less


dit provides longer length for a given pressure difference



The density of water is 1000 kg/m3 at__________________?


a0°C


b0°K


c4°C D. 20°C


dall temperature


View Answer 4°C D. 20°C

Specific weight of sea water is more that of pure water because it contains_________________?


adissolved air


bdissolved salt


csuspended matter


dall of the above


View Answer all of the above

Free surface of a liquid tends to contract to the smallest possible area due to force of_______________?


asurface tension


bviscosity


cfriction


dcohesion


View Answer surface tension

Falling drops of water become spheres due to the property of ____________________?


aadhesion


bcohesion


csurface tension


dviscosity


View Answer surface tension

The continuity equation is connected with__________________?


aviscous/unviscous fluids


bcompressibility of fluids


cconservation of mass


dsteady/unsteady flow


View Answer conservation of mass

Newton’s law of viscosity is a relationship between____________________?


ashear stress anctthejiate of angular distortion


bshear stress and viscosity


cshear stress, velocity and viscosity


dpressure, velocity and viscosity



Pressure of the order of 10″‘ torr can be measured by__________________?


aBourdon tube


bPirani Gauge


cmicro-manometer


dionisastion gauge


View Answer ionisastion gauge

Mercury is often used in barometer because____________________?


ait is the best liquid


bthe height of barometer will be less


cits vapour pressure is so low that it may be neglected


dboth B. and C.


View Answer both B. and C.

Which of the following instrument can be used for measuring speed of a submarine moving in deep sea__________________?


aVenturimeter


bOrifice plate


chot wire anemometer


dpitot tube


View Answer pitot tube

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