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

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

Question # 2

Internal energy is the sum of all the forms of

Question # 3

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

Question # 4

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

Question # 5

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 # 6

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

Question # 7

In an ideal gas, the molecules have:

Question # 8

If an amount of heat enters the system it could

Question # 9

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

Question # 10

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

Question # 11

In an adiabatic expansion, the temperature of the gas

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Gas constant per molecule is called:

Question # 16

The bicycle pump provides a good example of

Question # 17

Real gases strictly obey gas law at:

Question # 18

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

Question # 19

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

Question # 20

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 21

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

Question # 22

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

Question # 23

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 # 24

The internal energy of an ideal gas system is generally the

Question # 25

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

The only significant motion possessed by the mono-atomic gas represented is:

Question # 30

Generally a temperature scale is established by using certain physical properties of a material which varies

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None
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 In the theory of dimensional analysis, heat may be properly represented by:
A. ML2T-2
B. MT-2
C. ML-1T-1
D. None of these
4 In which process the condition for the application of Boyle's law on the gas is fulfilled
A. isochoric process
B. adiabatic process
C. isothermal process
D. none of them
5 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
6 The efficiency of petrol engine is usually not more than 25% to 30% because of
A. friction
B. heat losses
C. both of them
D. none of them
7 The temperature of gas is produced by
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules
8 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%
9 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
A. 300°C
B. 573°C
C. 600°C
D. 743°C
10 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant

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