ECAT Pre Engineering Physics Chapter 11 MCQ Test With Answer

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ECAT Physics Chapter 11 Important MCQ's

Sr.#	Question	Answer
1	A heat engine is that which converts	A. mechanical energy into thermal energy B. thermal energy into mechanical energy C. K.E into potential energy D. heat energy into light energy
2	The only significant motion possessed by the mono-atomic gas represented is:	A. Translatory B. Rotatory C. Vibratory D. None of these
3	First law of thermodynamics is consequence of conservation of	A. Work B. Energy C. Heat D. All of these
4	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
5	The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be	A. 2.0 x 10^-5/°C B. 4.0x10^-5/°C C. 6.0x10^-5/°C D. 2.33x10^-5/°C
6	During the whole carnot cycle	A. Thermal equilibrium is maintained B. mechanical equilibrium is maintained C. both the thermal and mechanical equilibriumis maintained D. both the thermal and mechanical equilibrium is not maintained
7	Triple point of water is	A. 273.16°F B. 372.16K C. 273.16°F D. 273.16
8	If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is	A. 2 : 1 B. 4 : 1 C. 1 : 4 D. 3 : 4
9	Hotness and coldness of an object is represented in terms:	A. Heat B. Temperature C. Chemical energy D. None of these
10	The efficiency of petrol engine is usually not more than 25% to 30% because of	A. friction B. heat losses 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

The product of the pressure and volume of an ideal gas is

One kilogram of different substances contain

The temperature scale approved in SI units is:

At constant temperature, if the density of the gas is increased, its pressure will:

Which quantity is important in stating the entropy of the system

The motion of molecules in gases is:

Generally a temperature scale is established by

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

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

The absolute temperature of the tripple point of water is

The efficiency of diesel engine is

Maximum density of H2O is at the temperature

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

In the formula P = N0KT, N0denotes:

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

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

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

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

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

The internal energy of a system does not depend upon the

The ideal gas law is

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

First law of thermodynamic is special case of

In the theory of dimensional analysis, heat may be properly represented by:

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

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

Which of the following is not an example of adiabatic process

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

Rate of diffusion is

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

ECAT Physics Chapter 11 Important MCQ's

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Bilal A Munir

Maximum density of H₂O is at the temperature

In the formula P = N₀KT, N₀denotes:

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I³gives the: