ECAT Pre Engineering Physics Chapter 11 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 11 Heat & Thermodynamics

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Physics ECAT Pre Engineering Chapter 11 Heat & Thermodynamics

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Question # 1

Adiabatic change occurs when the gas

Question # 2

The Boltzman constant has the value

Question # 3

A real gas can be approximated to an ideal gas at

Question # 4

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 5

The disorder in the system increases due to the

Question # 6

First law of thermodynamics is consequence of conservation of

Question # 7

If an amount of heat enters the system it could

Question # 8

In the theory of dimensional analysis, heat may be properly represented by:

Question # 9

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 10

If the distance between two charges is doubled, the force between them will become:

Question # 11

While deriving the equation for pressure of a gas we consider the

Question # 12

Absolute temperature can be calculated by

Question # 13

When two objects come to common temperature, the body is said to be in:

Question # 14

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 15

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 16

Internal energy is the sum of all the forms of

Question # 17

When heat is removed from the system

Question # 18

The earliest heat engine was

Question # 19

Boyle's law is applicable in

Question # 20

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 21

The number of translation degress of freedom for a diatomic gas is

Question # 22

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 23

The internal energy of a system does not depend upon the

Question # 24

The example of irreversible process is

Question # 25

The work done by the system on its environment is considered as

Question # 26

A heat engine is that which converts

Question # 27

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 28

The nature of thermal radiation is similar to:

Question # 29

Which of the following is not an example of adiabatic process

Question # 30

While deriving equation of pressure by kinetic theory of gases, we take into account:

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Sr.# Question Answer
1 If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy
A. 0 J
B. 2 J
C. 5 J
D. 10 J
2 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
3 In the study of thermodynamics, which gas is considered as the working substance
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
4 A reversible cycle is the one in which
A. some of the changes are reversible
B. all of the changes are reversible
C. all of the changes are irreversible
D. none of them
5 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them
6 For the working of a heat engine, there must be
A. a source of heat at high temperature
B. a sink at low temperature
C. both of them
D. none of them
7 The behaviour of gases is well accounted by the kinetic theory based on
A. microscopic approach
B. macroscopic approach
C. both of them
D. none of them
8 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
9 According to kinetic theory of gases, molecules of a gas behave like
A. Inelastic spheres
B. Perfectly elastic rigid sphere
C. Perfectly elastic non-rigid spheres
D. Inelastic non-rigid spheres
10 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C

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