The atmospheric pressure with rise in altitude decreases__________________?

A. Linearly
B. First slowly and then steeply
C. First steeply and then gradually
D. Unpredictable

The rise or depression of liquid in a tube due to surface tensionwim increase in size of tube will________________?

A. Increase
B. Remain unaffected
C. May increase or decrease depending on the characteristics of liquid
D. Decrease

The units of dynamic or absolute viscosity are__________________?

A. Metres2 per sec
B. Kg sec/meter
C. Newton-sec per meter
D. Newton-sec2 per meter

The property by virtue of which a liquid opposes relative motion between its different layers is called_________________?

A. Surface tension
B. Co-efficient of viscosity
C. Viscosity
D. Osmosis

To avoid an interruption in the flow of a syphon, an air vessel is provided__________________?

A. At the inlet
B. At the outlet
C. At the summit
D. Ay nay point between inlet and outlet

The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is approximately____________________?

A. 1 mm
B. 5 mm
C. 10 mm
D. 20 mm

If the surface of liquid is convex, men ___________________?

A. Cohesion pressure is negligible
B. Cohesion pressure is decreased
C. Cohesion pressure is increased
D. There is no cohesion pressure

Rain drops are spherical because of__________________?

A. Viscosity
B. Air resistance
C. Surface tension forces
D. Atmospheric pressure

The conditions for the stable equilibrium of a floating body are___________________?

A. The meta-center should lie above the center of gravity
B. The center of buoyancy and the center of gravity must lie on the same vertical line
C. A righting couple should be formed
D. All the above are correct

The angle of contact in case of a liquid depends upon___________________?

A. The nature of the liquid and the solid
B. The material which exists above the free surface of the liquid
C. Both of die above
D. Any one of the above