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

00:00
Question # 1

A process is a reversible process, if the entropy of the system

Question # 2

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

Question # 3

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 4

Truth of kinetic energy is confirmed by:

Question # 5

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

Question # 6

In case of an ideal gas, the P.E associated with its molecule is

Question # 7

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

Question # 8

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 # 9

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 10

Internal energy is the sum of all the forms of

Question # 11

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

Question # 12

At constant volume temperature is increased. Then

Question # 13

Which quantity is important in stating the entropy of the system

Question # 14

Sadi carnot described an ideal heat engine in

Question # 15

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 16

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

Question # 17

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 18

According to kinetic theory of gases, molecules of a gas behave like

Question # 19

The pressure exerted by the gas is

Question # 20

Average KE of a gas molecule has:

Question # 21

The curve representing an isothermal process is called

Question # 22

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

Question # 23

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

Question # 24

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 25

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 # 26

Which of the following is not an example of adiabatic process

Question # 27

If the volume of the gas is to be increased by 4 times, then

Question # 28

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

Question # 29

For the working of a heat engine, there must be

Question # 30

Pressure exerted by a gas is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 If the volume of the gas is to be increased by 4 times, then
A. Temperature and pressure must be doubled
B. At constant P the temperature must be increased by 4 times
C. At constant T the pressure must be increased by four times
D. It cannot be increased
2 Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
3 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
4 Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
5 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
6 Pressure exerted by a gas is
A. Independent of density of the gas
B. Inversely proportional to the density of the gas
C. Directly proportional to the square of the density of the gas
D. Directly proportional to the density of the gas
7 Which of the following is not an assumption of kinetic energy
A. a finite volume of gas consists of very large number of molecules
B. the gas molecules are in random motion
C. collision between the gas molecules are inelastic
D. the size of the gas molecules is much smaller than the separation between molecules
8 Pressure of a gas at constant volume is proportion to
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
9 The internal energy of an ideal gas system is generally the
A. translational K.E of molecules
B. vibrational K.E of molecules
C. rotational K.E of molecules
D. all of them
10 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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