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

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

Question # 2

Efficiency of carnot engine is independent of the

Question # 3

Rate of diffusion is

Question # 4

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

Question # 5

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

Question # 6

One kilogram of different substances contain

Question # 7

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

Question # 8

Hotness and coldness of an object is represented in terms:

Question # 9

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

Question # 10

The only significant motion possessed by the mono-atomic gas represented is:

Question # 11

The volume of universal gas constant R is:

Question # 12

Internal energy is the sum of all the forms of

Question # 13

Boyle's law is applicable in

Question # 14

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

Question # 15

In an adiabatic expansion, the temperature of the gas

Question # 16

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 17

A succession of events which bring the system back to its initial condition is called

Question # 18

Which quantity is important in stating the entropy of the system

Question # 19

Which of the following is not an example of adiabatic process

Question # 20

The motion of molecules in gases is:

Question # 21

A real gas can be approximated to an ideal gas at

Question # 22

In an ideal gas, the molecules have:

Question # 23

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

Question # 24

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

Question # 25

Generally a temperature scale is established by

Question # 26

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

Question # 27

On colliding in a closed container, the gas molecules

Question # 28

First law of thermodynamics is consequence of conservation of

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
2 For making cooking utensils, which of the following pairs of properties is most suited?
A. Low specific heat and high conductivity
B. Low specific heat and low conductivity
C. High specific heat and high conductivity
D. High specific heat and low conductivity
3 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
4 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
5 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
6 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
7 Since the absolute scale is independent of the property of the working substance, hence, can be applied at
A. very high temperature
B. very low temperature
C. any one of them
D. none of them
8 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
9 The second law of thermodynamics is concerned with the circumstances in which
A. heat can be converted into work
B. direction of flow of heat
C. none of them
D. both of them
10 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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