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

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

Question # 2

One kilogram of different substances contain

Question # 3

Sadi carnot described an ideal heat engine in

Question # 4

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 5

Absolute temperature can be calculated by

Question # 6

Truth of kinetic energy is confirmed by:

Question # 7

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 # 8

On colliding in a closed container, the gas molecules

Question # 9

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

Question # 10

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 # 11

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 12

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 13

Which of the following is not thermo dynamical function?

Question # 14

Which of the following is not an example of adiabatic process

Question # 15

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 # 16

In an adiabatic expansion, the temperature of the gas

Question # 17

Which of the following is not an assumption of kinetic energy

Question # 18

Pressure of a gas at constant volume is proportion to

Question # 19

The example of reversible process is

Question # 20

The bicycle pump provides a good example of

Question # 21

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 # 22

First law of thermodynamics is consequence of conservation of

Question # 23

If the formula PV = nRT, n denotes:

Question # 24

The concept of entropy was introduced into the study of thermodynamics in

Question # 25

In an ideal gas, the molecules have:

Question # 26

Good absorbers of heat are

Question # 27

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 28

Energy gas behaves like an ideal gast at

Question # 29

We cannot utilize the heat contents of oceans and atmosphere because

Question # 30

A carnot cycle consists of

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The Boltzman constant has the value
A. 1.38 x 10-23JK-1
B. 1.28 x 10-23JK-1
C. 1.38 x 10-26JK-1
D. 1.28 x 10-26JK-1
2 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
3 Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be
A. R/2
B. P
C. 2P
D. Depending on the relative mass of the gases
4 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
5 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
6 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
7 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
8 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
9 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
A. 1 : 2
B. 2 : 3
C. 3 : 4
D. 8 : 9
10 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C

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