ECAT Pre Engineering Physics Chapter 11 MCQ Test With Answer

Top Scorers Of Physics ECAT Pre Engineering Chapter 11 Heat & Thermodynamics MCQ`s Test

D

Deuspeu 25 - Sep - 2024 02 Min 03 Sec 115/120
M

M Umer Arain 19 - Nov - 2024 00 Min 11 Sec 105/120
D

Dr Shahida 01 - Nov - 2024 11 Min 12 Sec 100/120
N

Nitalaya Hassan 24 - Dec - 2024 04 Min 02 Sec 95/120
G

Ghulam Murtaza 12 - Sep - 2024 20 Min 35 Sec 95/120
A

Akshey Lohana 27 - Aug - 2024 14 Min 26 Sec 90/120
U

Umair Rajput 09 - Sep - 2024 15 Min 22 Sec 85/120
I

It's me Sm 26 - Aug - 2024 04 Min 12 Sec 80/120
S

Sania Ahmed 16 - Dec - 2024 04 Min 58 Sec 75/120
K

Kalsoom Memon 20 - Sep - 2024 06 Min 11 Sec 75/120
S

Sanjna Uttwani 21 - Sep - 2024 05 Min 22 Sec 70/120
S

Sudais Khan 12 - Jul - 2024 07 Min 45 Sec 70/120
A

Aakash Rind 07 - Dec - 2024 06 Min 58 Sec 65/120
A

Ali imtiaz 01 - Oct - 2024 07 Min 18 Sec 65/120
R

Rashida Latif 13 - Jan - 2025 07 Min 37 Sec 65/120

Sr.#	Question	Answer
1	The earliest heat engine was	A. petrol engine B. diesel engine C. electric engine D. steam engine
2	The efficiency of diesel engine is	A. 25% B. 25 - 30% C. 35% D. 35 - 40%
3	The Boltzman constant has the value	A. 1.38 x 10^-23JK^-1 B. 1.28 x 10^-23JK^-1 C. 1.38 x 10^-26JK^-1 D. 1.28 x 10^-26JK^-1
4	Energy gas behaves like an ideal gast at	A. High temperature and low pressure B. Low temperature and high pressure C. Both A and B D. None
5	One mole of any substance contain	A. same number of molecules B. different number of molecules C. may be same or different D. none of them
6	Hotness and coldness of an object is represented in terms:	A. Heat B. Temperature C. Chemical energy D. None of these
7	In the formula P = N₀KT, N₀denotes:	A. Number of molecules per unit per volume B. Number of moles C. Number of molecules D. None of these
8	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
9	Which of the following is not thermo dynamical function?	A. Enthalpy B. Work done C. Gibb's energy D. Internal energy
10	In all natural processes where heat flows from one system to another, there is always a net	A. decrease in entropy B. increase in entropy C. decrease or increase in entropy D. none of them
11	One kilogram of different substances contain	A. same number of molecules B. different number of molecules C. may be same or different D. none of them
12	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
13	An isochoric process is one which take place at	A. Constant internal energy B. Constant entropy C. Constant volume D. Constant pressure
14	First law of thermodynamics is consequence of conservation of	A. Work B. Energy C. Heat D. All of these
15	Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called	A. heat capacity B. specific heat capacity C. specific heat at constant volume D. specific heat at constant pressure
16	The work done by the system on its environment is considered as	A. positive B. negative C. zero D. any one of them
17	The number of translation degress of freedom for a diatomic gas is	A. 2 B. 3 C. 5 D. 6
18	Electromagnetic waves emitted by hot bodies are called:	A. Photoelectrons B. Alpha rays C. Thermal radiation D. None of these
19	Pressure may be define as _______ per second per unit area:	A. Change in force B. Change in momentum C. Change in energy D. Work done
20	Brownian motion increases due to	A. Increase in size of Brownian particle B. Increase in temperature of medium C. Increase in density of medium D. Increase in viscosity of medium
21	No spark plug is needed in	A. petrol engine B. diesel engine C. both of them D. none of them
22	Maximum density of H₂O is at the temperature	A. 32°F B. 39.2°F C. 42°F D. 4°F
23	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
24	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
25	A process in which no heat enters or leaves the system is called	A. isochoric process B. isothermal process C. adiabatic process D. none of them
26	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
27	If an amount of heat enters the system it could	A. decrease the internal energy B. not change the internal energy C. increase the internal energy D. none of them
28	The concept of entropy was introduced into the study of thermodynamics in	A. 1856 B. 1865 C. 1656 D. 1685
29	In an adiabatic process the work is done at the expense of the	A. energy supplied to the system B. energy gained from the surroundings C. internal energy D. none of them
30	Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure	A. A greater than than of B B. A is equal to that of B C. A is less than that of B D. A is twice the pressure of B

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

ECAT Pre Engineering Physics Chapter 11 MCQ Test With Answer

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

Physics ECAT Pre Engineering Chapter 11 Heat & Thermodynamics

Which of the following is not an assumption of kinetic energy

A heat engine is that which converts

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

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

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

On colliding in a closed container, the gas molecules

The example of reversible process is

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

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

Melting point of ice

If the volume of the gas is to be increased by 4 times, then

Triple point of water is

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

When the temperature of source and sink of a heat engine become equal entropy change will be

Maximum density of H2O is at the temperature

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

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

When heat is removed from the system

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

We cannot utilize the heat contents of oceans and atmosphere because

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

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

Electromagnetic waves emitted by hot bodies are called:

At O° K which of the following properties of a gas will be zero?

Truth of kinetic energy is confirmed by:

The behaviour of gases is well accounted by the kinetic theory based on

One mole of any substance contain

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

Generally a temperature scale is established by

According to kinetic theory of gases, molecules of a gas behave like

Prepare Complete Set Wise Physics ECAT Pre Engineering Chapter 11 Heat & Thermodynamics MCQs Online With Answers

Set 1

Set 2

Set 3

Set 4

Set 5

Set 6

Top Scorers Of Physics ECAT Pre Engineering Chapter 11 Heat & Thermodynamics MCQ`s Test

Test Questions

Is this page helpful?

Maximum density of H₂O is at the temperature