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	The nature of thermal radiation is similar to:	A. Ultraviolet rays B. Light rays C. Both of them D. None of these
2	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
3	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
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	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}
6	Adiabatic change occurs when the gas	A. expands B. compressed C. expands or compressed D. expands or compressed rapidly
7	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
8	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
9	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
10	The percentage of available heat energy converted into work by a diesel engine is roughly	A. 35 %` B. 40 % C. 35 - 40 % D. 25 %

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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

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

Melting point of ice

A reversible cycle is the one in which

The internal energy of an ideal gas system is generally the

No spark plug is needed in

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

Rice takes longest to cook

The example of irreversible process is

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

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

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

Rate of diffusion is

The internal energy of a system does not depend upon the

The process which is carried out at constant temperature is known as

A diatomic gas molecule has

Absolute temperature can be calculated by

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

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

Which of the following is a state variable

The number of translation degress of freedom for a diatomic gas is

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

A typical four stroke petrol engine undergoes how many successive processes in each cycle

During the whole carnot cycle

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

The temperature scale approved in SI units is:

Truth of kinetic energy is confirmed by:

Hotness and coldness of an object is represented in terms:

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

The curve representing an isothermal process is called

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

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ECAT Physics Chapter 11 Important MCQ's

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