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

Which of the following is not thermo dynamical function?

Question # 2

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 3

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 4

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

Question # 5

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 6

Pressure of a gas at constant volume is proportion to

Question # 7

The disorder in the system increases due to the

Question # 8

When heat is added into the system then change in entropy is

Question # 9

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

Question # 10

Gas constant per molecule is called:

Question # 11

No spark plug is needed in

Question # 12

A diatomic gas molecule has

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

One mole of any substance contain

Question # 17

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

Question # 18

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 # 19

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 # 20

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

Question # 21

In a heat engine, heat is supplied by the

Question # 22

When heat is removed from the system

Question # 23

The temperature scale approved in SI units is:

Question # 24

If an amount of heat enters the system it could

Question # 25

The pressure exerted by the gas is

Question # 26

If the formula PV = nRT, n denotes:

Question # 27

An isochoric process is one which take place at

Question # 28

Efficiency of carnot engine is independent of the

Question # 29

In thermodynamics, internal energy is the function of

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The percentage of available heat energy converted into work by a diesel engine is roughly
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %
2 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
3 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
4 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
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 Energy gas behaves like an ideal gast at
A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None
7 Boyle's law is applicable in
A. Isochoric process
B. Isothermal process
C. Isobaric process
D. Isotonic process
8 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
9 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
10 One kilogram of different substances contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them

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