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

Which of the following is not an assumption of kinetic energy

Question # 2

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

Question # 3

The state in which ice, water and vapour coexists in equilibrium is called

Question # 4

Truth of kinetic energy is confirmed by:

Question # 5

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

Question # 6

No spark plug is needed in

Question # 7

Generally a temperature scale is established by

Question # 8

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 9

At constant volume temperature is increased. Then

Question # 10

At O° K which of the following properties of a gas will be zero?

Question # 11

In case of an ideal gas, the P.E associated with its molecule is

Question # 12

The disorder in the system increases due to the

Question # 13

Which of the following is a state variable

Question # 14

During the whole carnot cycle

Question # 15

Which quantity is important in stating the entropy of the system

Question # 16

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 17

When heat is removed from the system

Question # 18

First law of thermodynamics is consequence of conservation of

Question # 19

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 20

Pressure of a gas at constant volume is proportion to

Question # 21

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 22

On colliding in a closed container, the gas molecules

Question # 23

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 24

In the study of thermodynamics, which gas is considered as the working substance

Question # 25

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 26

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 27

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 28

Pressure may be define as _______ per second per unit area:

Question # 29

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 30

A heat engine is that which converts

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Sr.# Question Answer
1 The value of E0in coulomb's law is:
A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2
2 We cannot utilize the heat contents of oceans and atmosphere because
A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them
3 When two objects come to common temperature, the body is said to be in:
A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
4 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
5 Boyle's law is applicable in
A. Isochoric process
B. Isothermal process
C. Isobaric process
D. Isotonic process
6 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
7 The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is
A. 70%
B. 100%
C. 35%
D. 38%
8 On a cold morning a metal surface will fell colder to touch than a wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity
9 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4
10 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them

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