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

Real gases strictly obey gas law at:

Question # 2

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

Question # 3

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 4

A heat engine is that which converts

Question # 5

The state in which ice, water and vapour coexists in equilibrium is called

Question # 6

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

Question # 7

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 8

The internal energy of an ideal gas system is generally the

Question # 9

During the whole carnot cycle

Question # 10

The nature of thermal radiation is similar to:

Question # 11

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

Question # 12

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 13

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

Question # 14

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

Question # 15

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 16

In the theory of dimensional analysis, heat may be properly represented by:

Question # 17

Melting point of ice

Question # 18

Sadi carnot described an ideal heat engine in

Question # 19

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 20

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 21

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 22

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

Question # 23

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

Question # 24

Maximum density of H2O is at the temperature

Question # 25

Adiabatic change occurs when the gas

Question # 26

In an ideal gas, the molecules have:

Question # 27

The Boltzman constant has the value

Question # 28

The pressure exerted by the gas is

Question # 29

Good absorbers of heat are

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4
2 Pressure of a gas at constant volume is proportion to
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
3 While deriving the equation for pressure of a gas we consider the
A. rotational motion of molecules
B. vibrational motion of molecules
C. linear motion of molecules
D. all of them
4 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
5 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none of them
6 At constant volume temperature is increased. Then
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collision will be in straight lines
D. Collision will not change
7 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
8 When two objects come to common temperature, the body is said to be in:
A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
9 R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
A. 2V
B. 3V
C. 0.5V
D. V
10 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
A. A greater than than of B
B. A is equal to that of B
C. A is less than that of B
D. A is twice the pressure of B

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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