ECAT Pre Engineering Physics Chapter 11 MCQ Test With Answer

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

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

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Physics ECAT Pre Engineering Chapter 11 Heat & Thermodynamics

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Question # 1

The motion of molecules in gases is:

Question # 2

Which of the following is not an assumption of kinetic energy

Question # 3

Gas constant per molecule is called:

Question # 4

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 5

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 6

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

Question # 7

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 # 8

In thermodynamics, internal energy is the function of

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

The example of irreversible process is

Question # 14

In an adiabatic expansion, the temperature of the gas

Question # 15

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

Question # 16

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 17

At constant volume temperature is increased. Then

Question # 18

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

Question # 19

Heat travels through vacuum by

Question # 20

In case of an ideal gas, the P.E associated with its molecule is

Question # 21

Carnot heat engine only used

Question # 22

An isochoric process is one which take place at

Question # 23

The example of reversible process is

Question # 24

Pressure exerted by a gas is

Question # 25

While deriving the equation for pressure of a gas we consider the

Question # 26

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 # 27

During the whole carnot cycle

Question # 28

One mole of any substance contain

Question # 29

For the working of a heat engine, there must be

Question # 30

Triple point of water is

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Sr.# Question Answer
1 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
2 In the reverse process, the working substance passes through the same stages as in the direct process and
A. thermal effects at each stage are exactly reversed
B. mechanical effects at each stage are exactly reversed
C. thermal and mechanical effects at each stage remain the same
D. thermal and mechanical effects at each stage are exactly reversed
3 While deriving the equation for pressure of a gas we consider the
A. rotational motion of molecules
B. vibrational motion of molecules
C. linear motion of molecules
D. all of them
4 Adiabatic change occurs when the gas
A. expands
B. compressed
C. expands or compressed
D. expands or compressed rapidly
5 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
6 In an adiabatic process the work is done at the expense of the
A. energy supplied to the system
B. energy gained from the surroundings
C. internal energy
D. none of them
7 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
8 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
9 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
10 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None

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