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

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 2

Gas constant per molecule is called:

Question # 3

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

Question # 4

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

Question # 5

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 6

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 # 7

Sadi carnot described an ideal heat engine in

Question # 8

The earliest heat engine was

Question # 9

Real gases strictly obey gas law at:

Question # 10

The motion of molecules in gases is:

Question # 11

The internal energy of an ideal gas system is generally the

Question # 12

The internal energy of a system does not depend upon the

Question # 13

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

Question # 14

When heat is removed from the system

Question # 15

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 # 16

In an adiabatic expansion, the temperature of the gas

Question # 17

Which of the following is not an assumption of kinetic energy

Question # 18

Carnot heat engine only used

Question # 19

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 20

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 21

In the formula P = N0KT, N0denotes:

Question # 22

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

Question # 23

A reversible cycle is the one in which

Question # 24

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

Question # 25

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 26

At O° K which of the following properties of a gas will be zero?

Question # 27

Pressure may be define as _______ per second per unit area:

Question # 28

If the distance between two charges is doubled, the force between them will become:

Question # 29

Efficiency of carnot engine is independent of the

Question # 30

The process which is carried out at constant temperature is known as

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy
A. 0 J
B. 2 J
C. 5 J
D. 10 J
4 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
5 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
A. second law thermodynamics
B. first law of thermodynamics
C. third law of thermodynamics
D. none of them
6
During the whole carnot cycle
A. Thermal equilibrium is maintained
B. mechanical equilibrium is maintained
C. both the thermal and mechanical equilibriumis maintained
D. both the thermal and mechanical equilibrium is not maintained
7 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
8 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
9 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
10 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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