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

Hotness and coldness of an object is represented in terms:

Question # 2

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

Question # 3

We can express the work in term of

Question # 4

Which of the following does not have the same units:

Question # 5

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

Question # 6

Real gases strictly obey gas law at:

Question # 7

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

Question # 8

Carnot heat engine only used

Question # 9

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

Question # 10

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

Question # 11

The internal energy of a system does not depend upon the

Question # 12

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

Question # 13

The earliest heat engine was

Question # 14

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 15

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 16

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 # 17

One mole of any substance contain

Question # 18

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

Question # 19

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

Question # 20

The value of E0in coulomb's law is:

Question # 21

Energy gas behaves like an ideal gast at

Question # 22

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

Question # 23

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

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

Pressure of a gas at constant volume is proportion to

Question # 26

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 27

Which quantity is important in stating the entropy of the system

Question # 28

The example of irreversible process is

Question # 29

Heat travels through vacuum by

Question # 30

The motion of molecules in gases is:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 The percentage of available heat energy converted into work by a petrol engine is roughly
A. 35 %
B. 40 %
C. 35 to 40 %
D. 25 %
3 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
4 The absolute temperature for an ideal gas is
A. directly proportional to the rotational K.E of gas molecules
B. directly proportional to the vibrational K.E of gas molecules
C. directly proportional to the average translational K.E.of gas molecules
D. directly proportional to the P.E. of gas molecules
5 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
6 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
7 The basis to define a temperature scale that is independent of material properties is provided by
A. carbon cycle
B. nitrogen cycle
C. Carnot cycle
D. irreversible cycle
8 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
9 Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
10 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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