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

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 # 2

Boyle's law is applicable in

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 7

We cannot utilize the heat contents of oceans and atmosphere because

Question # 8

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

Question # 9

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

Question # 10

In all natural processes where heat flows from one system to another, there is always a net

Question # 11

The bicycle pump provides a good example of

Question # 12

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 13

Sadi carnot described an ideal heat engine in

Question # 14

At absolute temperature, the kinetic energy of the molecules

Question # 15

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

Question # 16

The internal energy of a system does not depend upon the

Question # 17

Rice takes longest to cook

Question # 18

The curve representing an isothermal process is called

Question # 19

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 # 20

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

Question # 21

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

Question # 22

Which of the following is not an example of adiabatic process

Question # 23

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 24

The unit of thermodynamical scale is

Question # 25

The temperature of gas is produced by

Question # 26

An isochoric process is one which take place at

Question # 27

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 28

Adiabatic change occurs when the gas

Question # 29

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
2 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
3 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
4 Efficiency of carnot engine is independent of the
A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
5 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
6 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
7 In the theory of dimensional analysis, heat may be properly represented by:
A. ML2T-2
B. MT-2
C. ML-1T-1
D. None of these
8 While deriving equation of pressure by kinetic theory of gases, we take into account:
A. Only linear motion of molecules
B. Only rotational motion
C. Only vibratory motion
D. All of these
9 According to kinetic theory of gases, molecules of a gas behave like
A. Inelastic spheres
B. Perfectly elastic rigid sphere
C. Perfectly elastic non-rigid spheres
D. Inelastic non-rigid spheres
10 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none of them

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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