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 product of the pressure and volume of an ideal gas is	A. A constant B. Approximately equal to the universal gas constant C. Directly proportional to its temperature D. Inversely proportional to its temperature
2	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
3	Which of the following does not have the same units:	A. Work B. Heat C. Kinetic energy D. Power
4	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
5	The Boltzman constant has the value	A. 1.38 x 10^-23JK^-1 B. 1.28 x 10^-23JK^-1 C. 1.38 x 10^-26JK^-1 D. 1.28 x 10^-26JK^-1
6	One mole of any substance contain	A. same number of molecules B. different number of molecules C. may be same or different D. none of them
7	The unit of thermodynamical scale is	A. centigrade B. fahrenheit C. kelvin D. none of them
8	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
9	Carnot heat engine only used	A. isothermal processes B. adiabatic processes C. both of them D. none of them
10	According to kinetic theory of gases, molecules of a gas behave like	A. Inelastic spheres B. Perfectly elastic rigid sphere C. Perfectly elastic non-rigid spheres D. Inelastic non-rigid spheres

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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

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

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

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

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

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

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

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

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

The state in which ice, water and vapour coexists in equilibrium is called

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:

The pressure exerted by the gas is

A real gas can be approximated to an ideal gas at

In thermodynamics, internal energy is the function of

Adiabatic change occurs when the gas

The efficiency of diesel engine is

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

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

At absolute temperature, the kinetic energy of the molecules

For the working of a heat engine, there must be

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

The volume of universal gas constant R is:

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

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

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

Hotness and coldness of an object is represented in terms:

One mole of any substance contain

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

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

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ECAT Physics Chapter 11 Important MCQ's

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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: