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

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 # 2

Internal energy is the sum of all the forms of

Question # 3

In the study of thermodynamics, which gas is considered as the working substance

Question # 4

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

Question # 5

Which of the following is not thermo dynamical function?

Question # 6

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 7

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

Question # 8

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 # 9

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

Question # 10

Which quantity is important in stating the entropy of the system

Question # 11

In an ideal gas, the molecules have:

Question # 12

Brownian motion increases due to

Question # 13

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

Question # 14

Absolute zero is considered as that temperature at which:

Question # 15

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

Question # 16

Electromagnetic waves emitted by hot bodies are called:

Question # 17

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

Question # 18

A process in which no heat enters or leaves the system is called

Question # 19

Heat travels through vacuum by

Question # 20

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 # 21

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

Question # 22

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

Question # 23

A reversible cycle is the one in which

Question # 24

Maximum density of H2O is at the temperature

Question # 25

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 # 26

The curve representing an isothermal process is called

Question # 27

The nature of thermal radiation is similar to:

Question # 28

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 # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 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
A. 0°C
B. 10°C
C. 17°C
D. 20°C
3 For making cooking utensils, which of the following pairs of properties is most suited?
A. Low specific heat and high conductivity
B. Low specific heat and low conductivity
C. High specific heat and high conductivity
D. High specific heat and low conductivity
4
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
5 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
6 The temperature of gas is produced by
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules
7 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these
8 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
9 Efficiency of carnot engine is independent of the
A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
10 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:
A. Force
B. Density
C. Work done
D. Pressure

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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