ECAT Pre Engineering Physics Chapter 11 MCQ Test With Answer

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

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Sr. #	Question	Answer
1	If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:	A. -2 mv B. Zero C.2 mv D. mv
2	The internal energy of a system does not depend upon the	A. initial state of the system B. final state of the system C.path D. none of them
3	Rate of diffusion is	A. Faster in solids than in liquids and gases B. Faster in liquids than in solids and gases C.Equal to solids, liquids and gases D. Faster in gases than in liquids and solids
4	The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called	A. heat capacity B. specific heat capacity C.molar specific heat D. molar specific heat at constant volume
5	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	A. 0°C B. 10°C C.17°C D. 20°C
6	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
7	What temperature is the same on Celsius scale as well as on Fahrenheit scale?	A. 32°C B. -32°C C.-40°C D. -212°C
8	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
9	The curve representing an adiabatic process is called	A. isotherm B. adiabat C.adiable D. none of them
10	The ideal gas law is	A. P = nRT B. V = nRT C.PV =RT D. PV =nRT
11	At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be	A. 81 K B. 355 K C.627 K D. 627°C
12	The volume of universal gas constant R is:	A. 8.314 J/K mole K B. 8314 J/K mole K C.8.314 J/mole K D. None of these
13	The state in which ice, water and vapour coexists in equilibrium is called	A. zero degree celsius B. zero degree fahrenheit C.absolute zero D. 373 K
14	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	A. R/2 B. P C.2P D. Depending on the relative mass of the gases
15	A typical four stroke petrol engine undergoes how many successive processes in each cycle	A. one B. two C.three D. four
16	Which quantity is important in stating the entropy of the system	A. initial entropy B. final entropy C.change in entropy D. none of them
17	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
18	On colliding in a closed container, the gas molecules	A. Transfer momentum to the walls B. Momentum becomes zero C.Move in opposite directions D. Perform Brownian motion
19	If the formula PV = nRT, n denotes:	A. Number of molecules per unit volume B. Number of moles C.Number of molecules D. None of these
20	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
21	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
22	The heat required to raise the temperature of one mole of the substance through 1 K is called	A. heat capacity B. specific heat capacity C.molar specific heat D. all of them
23	An isochoric process is one which take place at	A. Constant internal energy B. Constant entropy C.Constant volume D. Constant pressure
24	The rate of change of momentum of a molecule is equal to:	A. Pressure B. Work C.Density D. Force
25	The work done by the system on its environment is considered as	A. positive B. negative C.zero D. any one of them
26	Efficiency of carnot engine is independent of the	A. temperature of sink B. temperature of source C.nature of the working substances D. none of them
27	The curve representing an isothermal process is called	A. adiabat B. isotherm C.fixed temperature D. none of them
28	The temperature scale approved in SI units is:	A. Celsius scale B. Kelvin scale C.Fehrenheit scale D. None of these
29	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	A. -20°C B. 6.67°C C.5°C D. 0°C
30	No spark plug is needed in	A. petrol engine B. diesel engine C.both of them D. none of them

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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

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

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

For the working of a heat engine, there must be

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

One kilogram of different substances contain

Pressure exerted by a gas is

In an adiabatic expansion, the temperature of the gas

No spark plug is needed in

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

First law of thermodynamic is special case of

If the distance between two charges is doubled, the force between them will become:

In the formula P = N0KT, N0denotes:

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

In an ideal gas, the molecules have:

The concept of entropy was introduced into the study of thermodynamics in

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 reversible cycle is the one in which

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

If an amount of heat enters the system it could

Absolute temperature can be calculated by

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

The efficiency of diesel engine is

The unit of thermodynamical scale is

Which of the following does not have the same units:

The temperature of gas is produced by

In thermodynamics, internal energy is the function of

The curve representing an isothermal process is called

Brownian motion increases due to

The value of E0in coulomb's law is:

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

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

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

Test Questions

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In the formula P = N₀KT, N₀denotes:

The value of E₀in coulomb's law is: