ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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Question # 1

Efficiency of carnot engine is independent of the

Question # 2

The percentage of available heat energy converted into work by a petrol engine is roughly

Question # 3

No spark plug is needed in

Question # 4

The value of E0in coulomb's law is:

Question # 5

Sadi carnot described an ideal heat engine in

Question # 6

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

Question # 7

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

Question # 8

The curve representing an adiabatic process is called

Question # 9

The efficiency of diesel engine is

Question # 10

Pressure exerted by a gas is

Question # 11

In the formula P = N0KT, N0denotes:

Question # 12

In an ideal gas, the molecules have:

Question # 13

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

Question # 14

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

Question # 15

At absolute temperature, the kinetic energy of the molecules

Question # 16

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

Question # 17

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

Question # 18

At O° K which of the following properties of a gas will be zero?

Question # 19

According to the second law, which is must to produce work

Question # 20

A reversible cycle is the one in which

Question # 21

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

Question # 22

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

Question # 23

The temperature of gas is produced by

Question # 24

Maximum density of H2O is at the temperature

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

The volume of universal gas constant R is:

Question # 30

Internal energy is the sum of all the forms of

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 Specific heat at constant pressure is greater than the specific heat at constant volume because
A. Heat is used up to increase temperature at constant pressure
B. Heat is used by gas for expansions purposes at constant pressure
C. Heat is use dup to increase internal energy
D. The above statement is invalid
4 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
5 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
6 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
7 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
8 A carnot cycle consists of
A. One step
B. two step
C. three steps
D. four steps
9 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
10 First law of thermodynamic is special case of
A. Law of conservation of energy
B. Charle's law
C. Law of conservation of mass
D. Boyle's law

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