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

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

Question # 2

The pressure exerted by the gas is

Question # 3

The value of E0in coulomb's law is:

Question # 4

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

Question # 5

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

Question # 6

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 7

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

Question # 8

Triple point of water is

Question # 9

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 # 10

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

Question # 11

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

Question # 12

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 13

We cannot utilize the heat contents of oceans and atmosphere because

Question # 14

The motion of molecules in gases is:

Question # 15

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 16

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

Question # 17

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 18

The example of reversible process is

Question # 19

Truth of kinetic energy is confirmed by:

Question # 20

Generally a temperature scale is established by

Question # 21

Adiabatic change occurs when the gas

Question # 22

In the theory of dimensional analysis, heat may be properly represented by:

Question # 23

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 24

Which of the following does not have the same units:

Question # 25

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 26

Average KE of a gas molecule has:

Question # 27

One kilogram of different substances contain

Question # 28

The absolute temperature for an ideal gas is

Question # 29

The basis to define a temperature scale that is independent of material properties is provided by

Question # 30

The bicycle pump provides a good example of

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
A. P=P/V<1/2mv2>
B. P=2N/V<1/2mv2>
C. P=2/3N/V<1/2mv2>
D. P=2/3N/V<mv2>
2 Average KE of a gas molecule has:
A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these
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 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
5 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
A. 0 J
B. 2 J
C. 5 J
D. 10 J
6 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
7 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them
8 A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them
9 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
10 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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