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

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

When two objects are rubbed together, their internal energy

Question # 8

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

Question # 9

The motion of molecules in gases is:

Question # 10

Pressure exerted by a gas is

Question # 11

If an amount of heat enters the system it could

Question # 12

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

Question # 13

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

Question # 14

Good absorbers of heat are

Question # 15

Rice takes longest to cook

Question # 16

An isochoric process is one which take place at

Question # 17

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

Question # 18

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 19

Absolute zero is considered as that temperature at which:

Question # 20

The temperature of gas is produced by

Question # 21

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

Question # 22

The curve representing an isothermal process is called

Question # 23

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

Question # 24

The internal energy of a system does not depend upon the

Question # 25

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 26

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

Question # 27

We cannot utilize the heat contents of oceans and atmosphere because

Question # 28

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

Question # 29

The pressure exerted by the gas is

Question # 30

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

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Sr.# Question Answer
1 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
2 The efficiency of petrol engine is usually not more than 25% to 30% because of
A. friction
B. heat losses
C. both of them
D. none of them
3 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
4 On colliding in a closed container, the gas molecules
A. Transfer momentum to the walls
B. Momentum becomes zero
C. Move in opposite directions
D. Perform Brownian motion
5 A reversible cycle is the one in which
A. some of the changes are reversible
B. all of the changes are reversible
C. all of the changes are irreversible
D. none of them
6 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them
7 A carnot cycle consists of
A. One step
B. two step
C. three steps
D. four steps
8 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
9 Rice takes longest to cook
A. In a submarine 100 m below the surface of the sea
B. At sea level
C. At Murree
D. At Mount Everest
10 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these

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