11_Mechanical Properties of Fluids

If two pieces of metal when immersed in a liquid have equal upthrust on them, then both pieces have equal

• mass
• weight
• density
• volume

For tap water and clean glass, the angle of contact is

• 140°
• 90°
• 0°
• 8°

If the surface of a liquid is plane, then the angle of contact of the liquid with the walls of container is

• 90°
• Obtuse angle
• 0°
• Acute angle

Liquid pressure depends upon

• directions
• height of the liquid column
• shape of the liquid surface
• area of the liquid surface

Sudden fall in the atmospheric pressure by a large amount shows

• rain
• storm
• fair weather
• cloud wave

Pressure inside two soap bubbles is 1.01 and 1.02 atmospheres. ratio between their volume is

• 8:1
• 2 : 1
• 102 : 101
• (102)3 : (101)3

The surface of water in contact with glass wall is

• concave
• convex
• Plane
• Both b and c

Hydraulic lifts and hydraulic brakes are based on

• Pascal’s law
• Bernoulli’s principle
• Archimedes’ principle
• Stoke’s law

Hot syrup flows faster because its

• viscosity increases
• surface tension increases
• surface tension decreases
• viscosity decreases

Plants get water through the roots because of

• Elasticity
• Viscosity
• Capillarity
• Gravity