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 an example of adiabatic process

Question # 2

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

Question # 3

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 # 4

The efficiency of diesel engine is

Question # 5

An isochoric process is one which take place at

Question # 6

A process in which no heat enters or leaves the system is called

Question # 7

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

Question # 8

Sadi carnot described an ideal heat engine in

Question # 9

Which quantity is important in stating the entropy of the system

Question # 10

Hotness and coldness of an object is represented in terms:

Question # 11

The nature of thermal radiation is similar to:

Question # 12

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

Question # 13

Rice takes longest to cook

Question # 14

Which of the following does not have the same units:

Question # 15

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 # 16

Energy gas behaves like an ideal gast at

Question # 17

The absolute temperature of the tripple point of water is

Question # 18

The only significant motion possessed by the mono-atomic gas represented is:

Question # 19

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

Question # 20

The example of irreversible process is

Question # 21

In an ideal gas, the molecules have:

Question # 22

At constant volume temperature is increased. Then

Question # 23

During the whole carnot cycle

Question # 24

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 25

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

Question # 26

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 # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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Sr.# Question Answer
1 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
2 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
3 The pressure exerted by the gas is
A. directly proportional to the P.E
B. inversely proportional to the P.E
C. inversely proportional to the K.E
D. directly proportional to the K.E
4 When the temperature of source and sink of a heat engine become equal entropy change will be
A. Zero
B. Max
C. Min
D. -ve
5 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
6 If a process cannot be retraced in the backward direction by reversing the controlling factors, it is
A. a reversible process
B. an irreversible process
C. any one of them
D. both of them
7 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
8 The internal energy of an ideal gas system is generally the
A. translational K.E of molecules
B. vibrational K.E of molecules
C. rotational K.E of molecules
D. all of them
9 The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume
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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