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

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

Question # 2

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

Question # 3

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

Question # 4

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 # 5

Which of the following is not thermo dynamical function?

Question # 6

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

Question # 7

Real gases strictly obey gas law at:

Question # 8

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

Question # 9

The nature of thermal radiation is similar to:

Question # 10

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

Question # 11

The second law of thermodynamics is concerned with the circumstances in which

Question # 12

On colliding in a closed container, the gas molecules

Question # 13

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

Question # 14

The efficiency of diesel engine is

Question # 15

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 16

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 # 17

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 # 18

The product of the pressure and volume of an ideal gas is

Question # 19

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 20

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

Question # 21

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

Question # 22

Boyle's law is applicable in

Question # 23

First law of thermodynamic is special case of

Question # 24

Electromagnetic waves emitted by hot bodies are called:

Question # 25

In which process the condition for the application of Boyle's law on the gas is fulfilled

Question # 26

Maximum density of H2O is at the temperature

Question # 27

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

Question # 28

A diatomic gas molecule has

Question # 29

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 30

A carnot cycle consists of

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
2 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
3 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv
4 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
5 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
A. 0 J
B. 2 J
C. 5 J
D. 10 J
6 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
7 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
8 The value of E0in coulomb's law is:
A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2
9 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
10 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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