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

Real gases strictly obey gas law at:

Question # 2

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

Question # 3

In which process the condition for the application of Boyle's law on the gas is fulfilled

Question # 4

The absolute temperature for an ideal gas is

Question # 5

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

Question # 6

We can express the work in term of

Question # 7

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

Question # 8

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

Question # 9

An isochoric process is one which take place at

Question # 10

When two objects are rubbed together, their internal energy

Question # 11

Boyle's law is applicable in

Question # 12

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 13

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

Question # 14

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

Question # 15

The pressure exerted by the gas is

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

The internal energy of an ideal gas system is generally the

Question # 23

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 24

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 25

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

Question # 26

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 27

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

Question # 28

The temperature scale approved in SI units is:

Question # 29

We cannot utilize the heat contents of oceans and atmosphere because

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them
2 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these
3 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
4 The bicycle pump provides a good example of
A. first law of thermodynamics
B. second law of thermodynamics
C. third law of thermodynamics
D. none of them
5 First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about
A. how heat is absorbed
B. how heat extracted
C. how this conversion takes place
D. none of them
6 Average KE of a gas molecule has:
A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these
7 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
8 Carnot heat engine only used
A. isothermal processes
B. adiabatic processes
C. both of them
D. none of them
9 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
10 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

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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