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	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	A. second law thermodynamics B. first law of thermodynamics C. third law of thermodynamics D. none of them
3	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
4	The behaviour of gases is well accounted by the kinetic theory based on	A. microscopic approach B. macroscopic approach C. both of them 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	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
7	The temperature scale approved in SI units is:	A. Celsius scale B. Kelvin scale C. Fehrenheit scale D. None of these
8	If R is gas constant for 1 gram mole, C_pand C_vare specific heat for a solid then	A. C_p- C_v= R B. C_p- C_{v < R} C. C_p- C_{v = 0} D. C_p- C_{v > R}
9	The number of translation degress of freedom for a diatomic gas is	A. 2 B. 3 C. 5 D. 6
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

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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

First law of thermodynamics is consequence of conservation of

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

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

Absolute zero is considered as that temperature at which:

The temperature of gas is produced by

In an ideal gas, the molecules have:

We can express the work in term of

Good absorbers of heat are

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

Real gases strictly obey gas law at:

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

A heat engine is that which converts

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

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

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

When two objects are rubbed together, their internal energy

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

One mole of any substance contain

Efficiency of carnot engine is independent of the

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

The ideal gas law is

Sadi carnot described an ideal heat engine in

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

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

The heat required to raise the temperature of one mole of the substance through 1 K is called

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

In which process the condition for the application of Boyle's law on the gas is fulfilled

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

The absolute temperature of the tripple point of water is

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

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ECAT Physics Chapter 11 Important MCQ's

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If R is gas constant for 1 gram mole, C_pand C_vare specific heat for a solid then