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

The pressure exerted by the gas is

Question # 2

A diatomic gas molecule has

Question # 3

The value of E0in coulomb's law is:

Question # 4

When two objects are rubbed together, their internal energy

Question # 5

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

Question # 6

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

Question # 7

The earliest heat engine was

Question # 8

Boyle's law is applicable in

Question # 9

Pressure of a gas at constant volume is proportion to

Question # 10

The bicycle pump provides a good example of

Question # 11

The absolute temperature for an ideal gas is

Question # 12

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 13

The volume of universal gas constant R is:

Question # 14

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 15

The temperature scale approved in SI units is:

Question # 16

One mole of any substance contain

Question # 17

Which of the following is not an assumption of kinetic energy

Question # 18

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

Question # 19

When heat is removed from the system

Question # 20

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 # 21

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

Question # 22

An isochoric process is one which take place at

Question # 23

For the working of a heat engine, there must be

Question # 24

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 25

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 26

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 27

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

Question # 28

Generally a temperature scale is established by

Question # 29

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 30

The basis to define a temperature scale that is independent of material properties is provided by

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A succession of events which bring the system back to its initial condition is called
A. reversible process
B. irreversible process
C. a cycle
D. none of them
2 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
3 In the study of thermodynamics, which gas is considered as the working substance
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
4 Which of the following is not an example of adiabatic process
A. the rapid escape of air from a burst type
B. the rapid expansion and compression of air through which a sound wave is passing
C. cloud formation in the atmosphere
D. none of them
5 The percentage of available heat energy converted into work by a diesel engine is roughly
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %
6 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
7 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
8 R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
A. 2V
B. 3V
C. 0.5V
D. V
9 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 %
10 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K

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