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

The example of reversible process is

Question # 2

The second law of thermodynamics is concerned with the circumstances in which

Question # 3

Which of the following does not have the same units:

Question # 4

The example of irreversible process is

Question # 5

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

Question # 6

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

Question # 7

Which of the following is not an assumption of kinetic energy

Question # 8

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

Question # 9

The nature of thermal radiation is similar to:

Question # 10

In an adiabatic process the work is done at the expense of the

Question # 11

The unit of thermodynamical scale is

Question # 12

Which of the following is not an example of adiabatic process

Question # 13

The rate of change of momentum of a molecule is equal to:

Question # 14

The relationship between Boltzmann constant k with R and NAis given as:

Question # 15

Truth of kinetic energy is confirmed by:

Question # 16

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

Question # 17

A reversible cycle is the one in which

Question # 18

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

Question # 19

Absolute zero is considered as that temperature at which:

Question # 20

Heat travels through vacuum by

Question # 21

The disorder in the system increases due to the

Question # 22

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 23

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 # 24

Average KE of a gas molecule has:

Question # 25

If an amount of heat enters the system it could

Question # 26

When two objects are rubbed together, their internal energy

Question # 27

On colliding in a closed container, the gas molecules

Question # 28

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 29

The internal energy of a system does not depend upon the

Question # 30

Electromagnetic waves emitted by hot bodies are called:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
2 Efficiency of carnot engine is independent of the
A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
3 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
4 Specific heat at constant pressure is greater than the specific heat at constant volume because
A. Heat is used up to increase temperature at constant pressure
B. Heat is used by gas for expansions purposes at constant pressure
C. Heat is use dup to increase internal energy
D. The above statement is invalid
5 While deriving equation of pressure by kinetic theory of gases, we take into account:
A. Only linear motion of molecules
B. Only rotational motion
C. Only vibratory motion
D. All of these
6 On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
A. adiabatically
B. isothermally
C. isochorically
D. isobarically
7 At constant volume temperature is increased. Then
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collision will be in straight lines
D. Collision will not change
8 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
9 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
10 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%

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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