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

A reversible cycle is the one in which

Question # 2

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 3

According to the second law, which is must to produce work

Question # 4

According to kinetic theory of gases, molecules of a gas behave like

Question # 5

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 6

The internal energy of a system does not depend upon the

Question # 7

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 8

Absolute temperature can be calculated by

Question # 9

Truth of kinetic energy is confirmed by:

Question # 10

Which of the following does not have the same units:

Question # 11

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 # 12

The volume of universal gas constant R is:

Question # 13

Internal energy is the sum of all the forms of

Question # 14

During the whole carnot cycle

Question # 15

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 16

For the working of a heat engine, there must be

Question # 17

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 18

Melting point of ice

Question # 19

On colliding in a closed container, the gas molecules

Question # 20

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

Question # 21

The disorder in the system increases due to the

Question # 22

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

Question # 23

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 24

The absolute temperature of the tripple point of water is

Question # 25

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

Question # 26

The percentage of available heat energy converted into work by a diesel engine is roughly

Question # 27

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 28

One mole of any substance contain

Question # 29

The motion of molecules in gases is:

Question # 30

In thermodynamics, internal energy is the function of

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
2 The percentage of available heat energy converted into work by a petrol engine is roughly
A. 35 %
B. 40 %
C. 35 to 40 %
D. 25 %
3 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them
4 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
5 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
6 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
7 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
8 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
9 The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to
A. 0°C
B. 10°C
C. 17°C
D. 20°C
10 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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