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

00:00
Question # 1

If an amount of heat enters the system it could

Question # 2

The example of irreversible process is

Question # 3

Sadi carnot described an ideal heat engine in

Question # 4

The internal energy of a system does not depend upon the

Question # 5

In a heat engine, heat is supplied by the

Question # 6

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 7

Heat travels through vacuum by

Question # 8

A diatomic gas molecule has

Question # 9

First law of thermodynamic is special case of

Question # 10

Efficiency of carnot engine is independent of the

Question # 11

Triple point of water is

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The Boltzman constant has the value

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Hotness and coldness of an object is represented in terms:

Question # 20

The nature of thermal radiation is similar to:

Question # 21

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

Question # 22

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

Question # 23

Average KE of a gas molecule has:

Question # 24

The absolute temperature of the tripple point of water is

Question # 25

When heat is removed from the system

Question # 26

During the whole carnot cycle

Question # 27

Melting point of ice

Question # 28

When two objects come to common temperature, the body is said to be in:

Question # 29

The pressure exerted by the gas is

Question # 30

Good absorbers of heat are

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Internal energy is the sum of all the forms of
A. K.E
B. P.E
C. both of them
D. none of them
2 The percentage of available heat energy converted into work by a diesel engine is roughly
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %
3 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
4 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
5 If the formula PV = nRT, n denotes:
A. Number of molecules per unit volume
B. Number of moles
C. Number of molecules
D. None of these
6 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
7 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
8 Rice takes longest to cook
A. In a submarine 100 m below the surface of the sea
B. At sea level
C. At Murree
D. At Mount Everest
9 The absolute temperature for an ideal gas is
A. directly proportional to the rotational K.E of gas molecules
B. directly proportional to the vibrational K.E of gas molecules
C. directly proportional to the average translational K.E.of gas molecules
D. directly proportional to the P.E. of gas molecules
10 We cannot utilize the heat contents of oceans and atmosphere because
A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them

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