ECAT Pre Computer Science Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

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ECAT Physics Chapter 11 Heat & Thermodynamics

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Question # 1

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

Question # 2

In a heat engine, heat is supplied by the

Question # 3

The earliest heat engine was

Question # 4

We cannot utilize the heat contents of oceans and atmosphere because

Question # 5

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

Question # 6

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

Question # 7

In an adiabatic expansion, the temperature of the gas

Question # 8

The percentage of available heat energy converted into work by a petrol engine is roughly

Question # 9

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

Question # 10

The curve representing an adiabatic process is called

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

In the study of thermodynamics, which gas is considered as the working substance

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
2 Carnot heat engine only used
A. isothermal processes
B. adiabatic processes
C. both of them
D. none of them
3 On a cold morning a metal surface will fell colder to touch than a wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity
4 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
5 According to the second law, which is must to produce work
A. a source contains a large amount of heat energy
B. two sources at the same temperature
C. two sources at the different temperatures
D. a source contains a small amount of energy
6 At constant volume temperature is increased. Then
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collision will be in straight lines
D. Collision will not change
7 R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
A. 2V
B. 3V
C. 0.5V
D. V
8 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
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 A succession of events which bring the system back to its initial condition is called
A. reversible process
B. irreversible process
C. a cycle
D. none of them

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