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

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

Question # 2

The Boltzman constant has the value

Question # 3

Sadi carnot described an ideal heat engine in

Question # 4

Generally a temperature scale is established by

Question # 5

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

Question # 6

The efficiency of diesel engine is

Question # 7

In a heat engine, heat is supplied by the

Question # 8

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

Question # 9

In an adiabatic expansion, the temperature of the gas

Question # 10

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 11

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 12

Rate of diffusion is

Question # 13

A diatomic gas molecule has

Question # 14

The curve representing an isothermal process is called

Question # 15

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 16

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

Question # 17

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 18

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 # 19

On colliding in a closed container, the gas molecules

Question # 20

A reversible cycle is the one in which

Question # 21

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 22

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

Question # 23

Absolute zero is considered as that temperature at which:

Question # 24

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

Question # 25

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

Question # 26

The bicycle pump provides a good example of

Question # 27

The motion of molecules in gases is:

Question # 28

Pressure may be define as _______ per second per unit area:

Question # 29

One kilogram of different substances contain

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 Which of the following is not an assumption of kinetic energy
A. a finite volume of gas consists of very large number of molecules
B. the gas molecules are in random motion
C. collision between the gas molecules are inelastic
D. the size of the gas molecules is much smaller than the separation between molecules
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 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4
5 The number of translation degress of freedom for a diatomic gas is
A. 2
B. 3
C. 5
D. 6
6 Carnot heat engine only used
A. isothermal processes
B. adiabatic processes
C. both of them
D. none of them
7 The second law of thermodynamics is concerned with the circumstances in which
A. heat can be converted into work
B. direction of flow of heat
C. none of them
D. both of them
8 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
9 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
10 First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about
A. how heat is absorbed
B. how heat extracted
C. how this conversion takes place
D. none of them

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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