Mechanical Properties of Fluids Quiz 1 – Punjab Meritorious School Preparation Portal

Welcome to your 18th July Mechanical Properties of Fluids Quiz 1 CBT TEST

Fill the Details mentioned below and Attempt the Test.

Name

School Name with City

Phone Number

Question is mentioned below :

0.5 cm

100 cm

1 cm

10 cm

Question is mentioned below :

The angle of contact between pure water and pure glass, is

0°

45°

90°

135°

The terminal velocity of a small steel ball of radius r falling under gravity through a column of a viscous liquid of coefficient of viscosity η depends on mass of the ball m, acceleration due to gravity g, coefficient of viscosity n and radius r. Which of the following relations is dimensionally correct ?

The wettability of a surface by a liquid depends primarily on

density

viscosity

angle of contact between the surface and the liquid

surface tension

A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in water. The mass of water that will rise in this tube is

2.5 g

10.0 g

5.0 g

20.0 g

A fluid is in streamline flow across a horizontal pipe of variable area of cross section. For this which of the following statements is correct?

The velocity is minimum at the narrowest part of the pipe and the pressure is minimum at the widest part of the pipe.

The velocity is maximum at the narrowest part of the pipe and pressure is maximum at the widest part of the pipe.

Velocity and pressure both are maximum at the widest part of the pipe.

Velocity and pressure both are maximum at the narrowest part of the pipe.

Water rises to a height h in capillary tube. If the length of capillary tube above the surface of water is made less than ‘h’ then :

water rises upto the top of capillary tube and stays there without overflowing.

water does not rise at all

water rises upto the tip of capillary tube and then starts overflowing like a fountain

water rises upto a point a little below the top and stays there

A small sphere of radius ‘r’ falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to

A certain number of spherical drops of a liquid of radius r coalesce to form a single drop of radius R and volume V. If T is the surface tension of the liquid, then

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