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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ECAT Physics Chapter 11 Important MCQ's

Sr.#	Question	Answer
1	The pressure exerted by the gas is	A. directly proportional to the P.E B. inversely proportional to the P.E C. inversely proportional to the K.E D. directly proportional to the K.E
2	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
3	First law of thermodynamic is special case of	A. Law of conservation of energy B. Charle's law C. Law of conservation of mass D. Boyle's law
4	Amount of heat required to raise the temperature of a body through 1 K is called its	A. Specific heat B. Water equivalent C. Thermal capacity D. Entropy
5	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
6	The curve representing an adiabatic process is called	A. isotherm B. adiabat C. adiable D. none of them
7	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
8	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
9	The bicycle pump provides a good example of	A. first law of thermodynamics B. second law of thermodynamics C. third law of thermodynamics D. none of them
10	The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is	A. 70% B. 100% C. 35% D. 38%

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

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

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

Adiabatic change occurs when the gas

The rate of change of momentum of a molecule is equal to:

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

No spark plug is needed in

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

The Boltzman constant has the value

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

Rate of diffusion is

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

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

The unit of thermodynamical scale is

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

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

The volume of universal gas constant R is:

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

If an amount of heat enters the system it could

When two objects are rubbed together, their internal energy

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

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

At absolute temperature, the kinetic energy of the molecules

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

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

The only significant motion possessed by the mono-atomic gas represented is:

If the formula PV = nRT, n denotes:

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

Electromagnetic waves emitted by hot bodies are called:

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ECAT Physics Chapter 11 Important MCQ's

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