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

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

Question # 2

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

Question # 3

Triple point of water is

Question # 4

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

Question # 5

The nature of thermal radiation is similar to:

Question # 6

Rice takes longest to cook

Question # 7

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 8

Good absorbers of heat are

Question # 9

Which of the following is not an assumption of kinetic energy

Question # 10

The product of the pressure and volume of an ideal gas is

Question # 11

Average KE of a gas molecule has:

Question # 12

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

Question # 13

A process is a reversible process, if the entropy of the system

Question # 14

Boyle's law is applicable in

Question # 15

The work done on the system by the environment is considered as

Question # 16

Energy gas behaves like an ideal gast at

Question # 17

The second law of thermodynamics is concerned with the circumstances in which

Question # 18

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 19

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

Question # 20

Truth of kinetic energy is confirmed by:

Question # 21

Adiabatic change occurs when the gas

Question # 22

In an ideal gas, the molecules have:

Question # 23

Which of the following is not an example of adiabatic process

Question # 24

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 25

The absolute temperature for an ideal gas is

Question # 26

The work done by the system on its environment is considered as

Question # 27

The behaviour of gases is well accounted by the kinetic theory based on

Question # 28

In an adiabatic expansion, the temperature of the gas

Question # 29

On colliding in a closed container, the gas molecules

Question # 30

The state in which ice, water and vapour coexists in equilibrium is called

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Sr.# Question Answer
1 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them
2 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
3 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
4 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
5 A process in which no heat enters or leaves the system is called
A. isochoric process
B. isothermal process
C. adiabatic process
D. none of them
6 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
7 Pressure of a gas at constant volume is proportion to
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
8 A carnot cycle consists of
A. One step
B. two step
C. three steps
D. four steps
9 For the working of a heat engine, there must be
A. a source of heat at high temperature
B. a sink at low temperature
C. both of them
D. none of them
10 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
11 Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
12 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
13 At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:
A. Double
B. Remains constant
C. Half
D. None of these
14 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
15 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
16 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
17 In the study of thermodynamics, which gas is considered as the working substance
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
18 If water in a closed bottle is taken up to the moon and opened, the water gets
A. Freeze
B. Boiled
C. Dissociated into O2and H2
D. Evaporated
19 The value of E0in coulomb's law is:
A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2
20 First law of thermodynamic is special case of
A. Law of conservation of energy
B. Charle's law
C. Law of conservation of mass
D. Boyle's law
21 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
22 The unit of thermodynamical scale is
A. centigrade
B. fahrenheit
C. kelvin
D. none of them
23 Boyle's law is applicable in
A. Isochoric process
B. Isothermal process
C. Isobaric process
D. Isotonic process
24 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
25 The number of translation degress of freedom for a diatomic gas is
A. 2
B. 3
C. 5
D. 6
26 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
27 In all natural processes where heat flows from one system to another, there is always a net
A. decrease in entropy
B. increase in entropy
C. decrease or increase in entropy
D. none of them
28 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
29 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these
30 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

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