Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_________________?

A. Force of adhesion
B. Force of cohesion
C. Force of friction
D. Force of diffusion

The difference of pressure between the inside and outside of a liquid drop is _______________?

A. P = txr
B. P = t/r
C. P = t/2r
D. P = 2t/r

The vapour pressure over the concave surface is______________________?

A. Less MAN the vapour pressure over the plane surface
B. Equal to the vapour pressure over the plane surface
C. Greater than the vapour pressure over the plane surface
D. Zero

To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than____________________?

A. 2.4 m above the hydraulic gradient
B. 6.4 m above the hydraulic gradient
C. 10.0 m above the hydraulic gradient
D. 5.0 above the hydraulic gradient

The process of diffusion of one liquid into the other through a semi-permeable membrane is called_______________________?

A. Viscosity
B. Osmosis
C. Surface tension
D. Cohesion

Newton’s law of viscosity is a relationship between____________________?

A. Shear stress anctthejiate of angular distortion
B. Shear stress and viscosity
C. Shear stress, velocity and viscosity
D. Pressure, velocity and viscosity

The continuity equation is connected with__________________?

A. Viscous/unviscous fluids
B. Compressibility of fluids
C. Conservation of mass
D. Steady/unsteady flow

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

A. Bourdon tube
B. Pirani gauge
C. Micro-manometer
D. Ionisastion gauge

Mercury is often used in barometer because____________________?

A. It is the best liquid
B. The height of barometer will be less
C. Its vapour pressure is so low that it may be neglected
D. Both b. and c.

An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of__________________?

A. 1
B. 1.2
C. 0.8
D. 0.75