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

The efficiency of diesel engine is

Question # 2

When two objects are rubbed together, their internal energy

Question # 3

In an adiabatic expansion, the temperature of the gas

Question # 4

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

Question # 5

A process in which no heat enters or leaves the system 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

Electromagnetic waves emitted by hot bodies are called:

Question # 8

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

Question # 9

The absolute temperature of the tripple point of water is

Question # 10

An isochoric process is one which take place at

Question # 11

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

Question # 12

In an adiabatic process the work is done at the expense of the

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

If the distance between two charges is doubled, the force between them will become:

Question # 17

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 18

During the whole carnot cycle

Question # 19

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

Question # 20

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

Question # 21

Triple point of water is

Question # 22

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

Question # 23

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 24

A diatomic gas molecule has

Question # 25

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

Question # 26

Rice takes longest to cook

Question # 27

The temperature scale approved in SI units is:

Question # 28

If the volume of the gas is to be increased by 4 times, then

Question # 29

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

Question # 30

Good absorbers of heat are

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
2 The disorder in the system increases due to the
A. removal of heat
B. addition of heat
C. removal or addition of heat
D. none of them
3 The percentage of available heat energy converted into work by a petrol engine is roughly
A. 35 %
B. 40 %
C. 35 to 40 %
D. 25 %
4 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
5 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
6 Generally a temperature scale is established by using certain physical properties of a material which varies
A. nonlinearly with temperature
B. linearly with temperature
C. either of them
D. none of them
7 Which quantity is important in stating the entropy of the system
A. initial entropy
B. final entropy
C. change in entropy
D. none of them
8 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
9 Triple point of water is
A. 273.16°F
B. 372.16K
C. 273.16°F
D. 273.16
10 Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called
A. heat capacity
B. specific heat capacity
C. specific heat at constant volume
D. specific heat at constant pressure

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