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 curve representing an adiabatic process is called

Question # 2

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

Question # 3

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

Question # 4

Heat travels through vacuum by

Question # 5

A heat engine is that which converts

Question # 6

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 # 7

When two objects are rubbed together, their internal energy

Question # 8

The disorder in the system increases due to the

Question # 9

In case of an ideal gas, the P.E associated with its molecule is

Question # 10

Adiabatic change occurs when the gas

Question # 11

Electromagnetic waves emitted by hot bodies are called:

Question # 12

Energy gas behaves like an ideal gast at

Question # 13

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

Question # 14

In an ideal gas, the molecules have:

Question # 15

In thermodynamics, internal energy is the function of

Question # 16

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 17

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

Question # 18

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 19

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 20

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

Question # 21

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

Question # 22

First law of thermodynamic is special case of

Question # 23

The pressure exerted by the gas is

Question # 24

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

Question # 25

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 26

Triple point of water is

Question # 27

The ideal gas law is

Question # 28

One kilogram of different substances contain

Question # 29

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

Question # 30

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The unit of thermodynamical scale is
A. centigrade
B. fahrenheit
C. kelvin
D. none of them
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 An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is
A. -20°C
B. 6.67°C
C. 5°C
D. 0°C
4 Adiabatic change occurs when the gas
A. expands
B. compressed
C. expands or compressed
D. expands or compressed rapidly
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 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
7 Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
8 A diatomic gas molecule has
A. translational energy
B. rotaional energy
C. vibrational energy
D. all of them
9 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
10 In all natural processes where heat flows from one system to another, there is always a net
A. decrease in entropy
B. increase in entropy
C. decrease or increase in entropy
D. none of them

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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