Mechanical Engineering MCQs

Page No. 23

The speed of sound in a ideal gas varies directly as its__________________?


apressure

✖


btemperature

✖


cdensity

✖


dabsolute temperature

✓


View Answer absolute temperature

Piezometer is used to measure_____________________?


apressure in pipe, channels etc.

✖


batmospheric pressure

✖


cvery low pressures

✓


ddifference of pressure between two points

✖


View Answer very low pressures

Which of the following manometer has highest sensitivity_________________?


aU-tube with water

✖


binclined U-tube

✖


cU-tube with mercury

✖


dmicro-manometer with water

✓



Working principle of dead weight pressure gauge tester is based on_______________?


aPascal’s law

✓


bDalton’s law of partial pressure

✖


cNewton’s law of viscosity .

✖


dAvogadro’s hypothesis

✖


View Answer Pascal’s law

Center of pressure compared to e.g. is___________________?


aabove it

✖


bbelow it

✓


cat same point

✖


dabove or below depending on area of body

✖


View Answer below it

A body floats in stable equilibrium ____________________?


awhen its meatcentric height is zero

✖


bwhen the metancentre is above e.g.

✓


cwhen its e.g. is below it’s center of buoyancy

✖


dmetacentre has nothing to do with position of e.g. for determining stability

✖



According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to_________________?


athe weight of the body

✖


bmore than the weight of the body

✖


cless than the weight of the body

✖


dweight of the fluid displaced by the body

✓



Center of pressure on an inclined plane is___________________?


aat the centroid

✖


babove the centroid

✖


cbelow the centroid

✓


dat metacentre

✖


View Answer below the centroid

The centre of gravity of the volume of the liquid displaced by an immersed body is called ___________________?


acentre of gravity

✖


bcentre of pressure

✖


cmetacentre

✖


dcentre of buoyancy

✓


View Answer centre of buoyancy

The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm”. The pressure at 2.5 m below the oil surface will be __________________?


a2 metres of water column

✖


b3 metres of water column

✓


c3.5 metres of water column

✖


d4 m of water column

✖



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