physical properties of materials - Category wise Question and Answer Practice Test with Solutions

Question : 31

A drop of oil is placed on the surface of water. Which of the following statements is correct?

a) It will spread as a thin layer

b) It will remain on it as a sphere

c) It will partly be a spherical droplet and partly a thin film

d) It will float as a distorted drop on the water surface

Question : 32 [PCS (Pre) 2003]

In automobile hydraulic brakes work on

a) Newton’s law of motion

b) Bernoulli’s Principle

c) Archimedes Principle

d) Pascal’s Law

Question : 33

A boy carries a fish in one hand and a bucket of water in the other hand. If he places the fish in the bucket, the weight now carried by him.

a) is more than before

b) is less than before

c) is the same as before

d) depends upon his speed

Question : 34

Water is flowing through a horizontal pipe in streamline flow. At the narrowest part of the pipe

a) Pressure is maximum and velocity is minimum

b) Velocity is maximum and pressure is minimum

c) Both the pressure and velocity are maximum

d) Both the velocity and pressure are minimum

Question : 35 [UPPCS (Pre) 2009]

While lifting a bucket of water from a well, we feel that the bucket

a) Becomes lighter above the surface of water

b) Loses stability on coming out of the water

c) Becomes heavier above the surface of water

d) Has gained mass on coming out of water