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

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

Question # 2

During the whole carnot cycle

Question # 3

The efficiency of diesel engine is

Question # 4

The unit of thermodynamical scale is

Question # 5

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

Question # 6

Energy gas behaves like an ideal gast at

Question # 7

At O° K which of the following properties of a gas will be zero?

Question # 8

No spark plug is needed in

Question # 9

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

Question # 10

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

Question # 11

The volume of universal gas constant R is:

Question # 12

The process which is carried out at constant temperature is known as

Question # 13

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

Question # 14

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

Question # 15

Which of the following is a state variable

Question # 16

We cannot utilize the heat contents of oceans and atmosphere because

Question # 17

First law of thermodynamics is consequence of conservation of

Question # 18

The relationship between Boltzmann constant k with R and NAis given as:

Question # 19

In an adiabatic expansion, the temperature of the gas

Question # 20

In a heat engine, heat is supplied by the

Question # 21

If the formula PV = nRT, n denotes:

Question # 22

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

A process in which no heat enters or leaves the system is called

Question # 27

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

Question # 28

Electromagnetic waves emitted by hot bodies are called:

Question # 29

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 30

The absolute temperature of the tripple point of water is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A process in which no heat enters or leaves the system is called
A. isochoric process
B. isothermal process
C. adiabatic process
D. none of them
2 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
3 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
4 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
5 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
6 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
7 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
8 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
9 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
10 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

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