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

00:00
Question # 1

An isochoric process is one which take place at

Question # 2

When two objects are rubbed together, their internal energy

Question # 3

The internal energy of an ideal gas system is generally the

Question # 4

The efficiency of diesel engine is

Question # 5

No spark plug is needed in

Question # 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

Question # 7

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

Question # 8

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 9

Brownian motion increases due to

Question # 10

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 11

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 12

The nature of thermal radiation is similar to:

Question # 13

The volume of universal gas constant R is:

Question # 14

A reversible cycle is the one in which

Question # 15

The relationship between Boltzmann constant k with R and NAis given as:

Question # 16

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

Question # 17

Triple point of water is

Question # 18

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 19

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 20

Rate of diffusion is

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

We can express the work in term of

Question # 26

Real gases strictly obey gas law at:

Question # 27

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

Question # 28

In case of an ideal gas, the P.E associated with its molecule is

Question # 29

The pressure exerted by the gas is

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
2 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
3 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
4 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
5 In which process the condition for the application of Boyle's law on the gas is fulfilled
A. isochoric process
B. adiabatic process
C. isothermal process
D. none of them
6 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%
7 Maximum density of H2O is at the temperature
A. 32°F
B. 39.2°F
C. 42°F
D. 4°F
8 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
9 The curve representing an adiabatic process is called
A. isotherm
B. adiabat
C. adiable
D. none of them
10 Rice takes longest to cook
A. In a submarine 100 m below the surface of the sea
B. At sea level
C. At Murree
D. At Mount Everest

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  • Bilal A Munir

    Bilal A Munir

    20 Jun 2018

    Nice

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