ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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Question # 1

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

Question # 2

The efficiency of diesel engine is

Question # 3

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 4

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

Question # 5

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 # 6

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

Question # 7

The volume of universal gas constant R is:

Question # 8

In the theory of dimensional analysis, heat may be properly represented by:

Question # 9

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 10

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 11

Which of the following does not have the same units:

Question # 12

When heat is added into the system then change in entropy is

Question # 13

The internal energy of a system does not depend upon the

Question # 14

Brownian motion increases due to

Question # 15

The example of reversible process is

Question # 16

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

Question # 17

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

Question # 18

The pressure exerted by the gas is

Question # 19

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

Question # 20

The curve representing an adiabatic process is called

Question # 21

Energy gas behaves like an ideal gast at

Question # 22

The curve representing an isothermal process is called

Question # 23

The internal energy of an ideal gas system is generally the

Question # 24

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 25

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

Question # 26

When heat is removed from the system

Question # 27

If an amount of heat enters the system it could

Question # 28

The Boltzman constant has the value

Question # 29

Adiabatic change occurs when the gas

Question # 30

Pressure of a gas at constant volume is proportion to

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them
2 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%
3 According to kinetic theory of gases, molecules of a gas behave like
A. Inelastic spheres
B. Perfectly elastic rigid sphere
C. Perfectly elastic non-rigid spheres
D. Inelastic non-rigid spheres
4 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
5 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
6 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
7 At constant temperature, if the density of the gas is increased, its pressure will:
A. One kg of a substance
B. Unit volume of a substance
C. One mole of a substance
D. None of these
8 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
9 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
10 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K

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