set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

A stretched rubber has

a) increased potential energy

b) increased kinetic energy

c) decreased kinetic energy

d) decreased potential energy

Question : 2

Which of the following is the byproduct derived from the refining process of petroleum?

a) Charcoal

b) Coal

c) Petrol

d) Asphalt

Question : 3

Elastomers are the materials which

a) have very small elastic range

b) are not elastic at all

c) do not obey Hooke’s law

d) None of these

Question : 4

In the figure below is shown the flow of the liquid through a horizontal pipe. Three tubes A, B and C are connected to the pipe. The radii of the tubes A, B and C at the junction are respectively 2 cm, 1 cm and 2 cms. It can be said that A B C

a) height of the liquid in the tube A and tube B is the same

b) the height of the liquid in the tube A is maximum

c) height of the liquid in all the three tubes is the same

d) height of the liquid in tube A and C is the same

Question : 5

A liquid is flowing in a streamlined manner through a cylindrical pipe. Alongwith a section containing the axis of the pipe, the flow profile will be

a)

b)

c)

d)

Question : 6

The separation of cream from milk by churning is due to

a) Cohesive force

b) Centrifugal force

c) Gravitational force

d) None of the above