Mechanical Engineering MCQs

Page No. 26

Resultant pressure of the liquid in the case of an immersed body acts through____________________?


acentre of gravity


bcentre of pressure


cmetacentre


dcentre of buoyancy


View Answer centre of pressure

Ratio of inertia force to surface Jension is known as ___________________?


aMach number


bFroude number


cReynold’s number


dWeber’s number


View Answer Weber’s number

A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is____________________?


a9,000 kg


b13,500 kg


c18,000 kg


d27,000 kg


View Answer 13,500 kg

A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is_________________?


a1


b5


c7


d6


View Answer 6

Metacentric height is the distance between the metacentre and_______________?


awater surface


bcenter of pressure


ccenter of gravity


dcenter of buoyancy


View Answer center of gravity

The resultant of all normal pressures acts___________________?


aat e.g. of body


bat center of pressure


cvertically upwards


dat metacentre


View Answer vertically upwards

Manometer is used to measure__________________?


apressure in pipes, channels etc


batmospheric pressure


cvery low pressure


ddifference of pressure between two points



Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem_________________?


aVenturimeter


bOrifice plate


cnozzle


dall of the above


View Answer all of the above

Which of the following instrument can be used for measuring speed of an aeroplane___________________?


aVenturimeter


bOrifice plate


chot wire anemometer


dpitot tube


View Answer pitot tube

In an isothermal atmosphere, the pressure___________________?


adecreases linearly with elevation


bremains constant


cvaries in the same way as the density


dincreases exponentially with elevation



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