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
(D) none of the above
Surface energy per unit area of a surface is numerically equal to ___________________?
(A) atmospheric pressure
(B) surface tension
(C) force of adhesion
(D) force of cohesion
(D) viscosity
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
(D) none of die above
The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is ap-proximately_______________?
(A) 1 mm
(B) 5 mm
(C) 10 mm
(D) 20 mm
(D) 30 mm
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
(D) none of the above
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
(D) none of the above
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
(D) diffusivity
The continuity equation is connected with_______________?
(A) viscous/unviscous fluids
(B) compressibility of fluids
(C) conservation of mass
(D) steady/unsteady flow
(D) open channel/pipe flow
Liquids transmit pressure equally in all the directions. This is according to_________________?
(A) Boyle’s law
(B) Archimedes principle
(C) Pascal’s law
(D) Newton’s formula
(D) Chezy’s equation
In an isothermal atmosphere, the pressure__________________?
(A) decreases linearly with elevation
(B) remains constant
(C) varies in the same way as the density
(D) increases exponentially with elevation
(D) unpredictable