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 heat engine is that which converts

Question # 2

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

Question # 3

The pressure exerted by the gas is

Question # 4

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 5

Heat travels through vacuum by

Question # 6

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

Question # 7

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 # 8

The ideal gas law is

Question # 9

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 10

The example of reversible process is

Question # 11

Boyle's law is applicable in

Question # 12

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

Question # 13

The efficiency of diesel engine is

Question # 14

Sadi carnot described an ideal heat engine in

Question # 15

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

Question # 16

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

Question # 17

When heat is removed from the system

Question # 18

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

Question # 19

The absolute temperature for an ideal gas is

Question # 20

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 21

Absolute temperature can be calculated by

Question # 22

The curve representing an adiabatic process is called

Question # 23

In thermodynamics, internal energy is the function of

Question # 24

No spark plug is needed in

Question # 25

We can express the work in term of

Question # 26

Electromagnetic waves emitted by hot bodies are called:

Question # 27

During the whole carnot cycle

Question # 28

Which of the following is a state variable

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
2 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
3 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
4 At constant volume temperature is increased. Then
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collision will be in straight lines
D. Collision will not change
5 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
6 A carnot cycle consists of
A. One step
B. two step
C. three steps
D. four steps
7 One kilogram of different substances contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
8 In the reverse process, the working substance passes through the same stages as in the direct process and
A. thermal effects at each stage are exactly reversed
B. mechanical effects at each stage are exactly reversed
C. thermal and mechanical effects at each stage remain the same
D. thermal and mechanical effects at each stage are exactly reversed
9 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
10 The unit of thermodynamical scale is
A. centigrade
B. fahrenheit
C. kelvin
D. none of them

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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