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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