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

The concept of entropy was introduced into the study of thermodynamics in

Question # 2

The absolute temperature of the tripple point of water is

Question # 3

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

Question # 4

If the formula PV = nRT, n denotes:

Question # 5

Maximum density of H2O is at the temperature

Question # 6

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 7

While deriving the equation for pressure of a gas we consider the

Question # 8

The ideal gas law is

Question # 9

Carnot heat engine only used

Question # 10

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 11

The unit of thermodynamical scale is

Question # 12

A heat engine is that which converts

Question # 13

In thermodynamics, internal energy is the function of

Question # 14

Pressure of a gas at constant volume is proportion to

Question # 15

The absolute temperature for an ideal gas is

Question # 16

An isochoric process is one which take place at

Question # 17

The basis to define a temperature scale that is independent of material properties is provided by

Question # 18

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

Question # 19

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 20

On colliding in a closed container, the gas molecules

Question # 21

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

Question # 22

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 # 23

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 24

The nature of thermal radiation is similar to:

Question # 25

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

Question # 26

The efficiency of diesel engine is

Question # 27

When heat is removed from the system

Question # 28

Truth of kinetic energy is confirmed by:

Question # 29

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

Question # 30

In an ideal gas, the molecules have:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
2 The Boltzman constant has the value
A. 1.38 x 10-23JK-1
B. 1.28 x 10-23JK-1
C. 1.38 x 10-26JK-1
D. 1.28 x 10-26JK-1
3 Which of the following is not an assumption of kinetic energy
A. a finite volume of gas consists of very large number of molecules
B. the gas molecules are in random motion
C. collision between the gas molecules are inelastic
D. the size of the gas molecules is much smaller than the separation between molecules
4 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None
5 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
6 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
7 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
8 Pressure exerted by a gas is
A. Independent of density of the gas
B. Inversely proportional to the density of the gas
C. Directly proportional to the square of the density of the gas
D. Directly proportional to the density of the gas
9 When the temperature of source and sink of a heat engine become equal entropy change will be
A. Zero
B. Max
C. Min
D. -ve
10 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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