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

Rice takes longest to cook

Question # 2

In all natural processes where heat flows from one system to another, there is always a net

Question # 3

The earliest heat engine was

Question # 4

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

Question # 5

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

Question # 6

Gas constant per molecule is called:

Question # 7

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 # 8

If the formula PV = nRT, n denotes:

Question # 9

Good absorbers of heat are

Question # 10

In an adiabatic expansion, the temperature of the gas

Question # 11

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

Question # 12

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

Question # 13

A diatomic gas molecule has

Question # 14

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 15

In a heat engine, heat is supplied by the

Question # 16

At constant volume temperature is increased. Then

Question # 17

The bicycle pump provides a good example of

Question # 18

The internal energy of an ideal gas system is generally the

Question # 19

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 20

Maximum density of H2O is at the temperature

Question # 21

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

Question # 22

Adiabatic change occurs when the gas

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

If an amount of heat enters the system it could

Question # 27

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 28

The curve representing an adiabatic process is called

Question # 29

For the working of a heat engine, there must be

Question # 30

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B
2 A reversible cycle is the one in which
A. some of the changes are reversible
B. all of the changes are reversible
C. all of the changes are irreversible
D. none of them
3
During the whole carnot cycle
A. Thermal equilibrium is maintained
B. mechanical equilibrium is maintained
C. both the thermal and mechanical equilibriumis maintained
D. both the thermal and mechanical equilibrium is not maintained
4 The Boltzman constant has the value
A. 1.38 x 10-23JK-1
B. 1.28 x 10-23JK-1
C. 1.38 x 10-26JK-1
D. 1.28 x 10-26JK-1
5 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
6 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
A. 0°C
B. 10°C
C. 17°C
D. 20°C
7 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
8 When two objects come to common temperature, the body is said to be in:
A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
9 The concept of entropy was introduced into the study of thermodynamics in
A. 1856
B. 1865
C. 1656
D. 1685
10 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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