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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