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

Absolute temperature can be calculated by

Question # 2

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 # 3

On colliding in a closed container, the gas molecules

Question # 4

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 # 5

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

Question # 6

Pressure exerted by a gas is

Question # 7

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

Question # 8

First law of thermodynamic is special case of

Question # 9

The example of reversible process is

Question # 10

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

Question # 11

In an ideal gas, the molecules have:

Question # 12

The unit of thermodynamical scale is

Question # 13

One kilogram of different substances contain

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

During the whole carnot cycle

Question # 18

If the volume of the gas is to be increased by 4 times, then

Question # 19

The temperature of gas is produced by

Question # 20

Sadi carnot described an ideal heat engine in

Question # 21

A heat engine is that which converts

Question # 22

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 23

The curve representing an isothermal process is called

Question # 24

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

Question # 25

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 # 26

Which of the following does not have the same units:

Question # 27

Absolute zero is considered as that temperature at which:

Question # 28

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

Question # 29

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

Question # 30

The number of translation degress of freedom for a diatomic gas is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%
2 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
A. P=P/V<1/2mv2>
B. P=2N/V<1/2mv2>
C. P=2/3N/V<1/2mv2>
D. P=2/3N/V<mv2>
3 For the working of a heat engine, there must be
A. a source of heat at high temperature
B. a sink at low temperature
C. both of them
D. none of them
4 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
5 Real gases strictly obey gas law at:
A. High pressure and low temperatures
B. Low pressures and high temperatures
C. High pressures and high temperatures
D. None of these
6 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
A. R/2
B. P
C. 2P
D. Depending on the relative mass of the gases
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 The disorder in the system increases due to the
A. removal of heat
B. addition of heat
C. removal or addition of heat
D. none of them
9 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
10 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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