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

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

Question # 2

In thermodynamics, internal energy is the function of

Question # 3

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

Question # 4

Energy gas behaves like an ideal gast at

Question # 5

The temperature of gas is produced by

Question # 6

The value of E0in coulomb's law is:

Question # 7

Which of the following is not thermo dynamical function?

Question # 8

Which of the following is not an assumption of kinetic energy

Question # 9

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

Question # 10

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

Question # 11

Average KE of a gas molecule has:

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

In an ideal gas, the molecules have:

Question # 16

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

Question # 17

No spark plug is needed in

Question # 18

The example of reversible process is

Question # 19

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

Question # 20

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

Question # 21

Electromagnetic waves emitted by hot bodies are called:

Question # 22

The pressure exerted by the gas is

Question # 23

We can express the work in term of

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

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

Question # 26

The internal energy of an ideal gas system is generally the

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
A. R/2
B. P
C. 2P
D. Depending on the relative mass of the gases
2 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
3 The percentage of available heat energy converted into work by a diesel engine is roughly
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %
4 We cannot utilize the heat contents of oceans and atmosphere because
A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them
5 The concept of entropy was introduced into the study of thermodynamics in
A. 1856
B. 1865
C. 1656
D. 1685
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 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
8 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
9 A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be
A. 1/2
B. More than 1/2
C. Less than 1/2
D. Between 1 and 2
10 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy

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