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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Sr.#	Question	Answer
1	For making cooking utensils, which of the following pairs of properties is most suited?	A. Low specific heat and high conductivity B. Low specific heat and low conductivity C. High specific heat and high conductivity D. High specific heat and low conductivity
2	A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called	A. reversible process B. irreversible process C. any one of them D. none of them
3	An isochoric process is one which take place at	A. Constant internal energy B. Constant entropy C. Constant volume D. Constant pressure
4	In the formula P = N₀KT, N₀denotes:	A. Number of molecules per unit per volume B. Number of moles C. Number of molecules D. None of these
5	At what temperature the adiabatic change is equivalent to the isothermal change?	A. Zero degree Celsius B. Zero Kelvin C. Critical temperature D. Above critical temperature
6	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
7	The motion of molecules in gases is:	A. Orderly B. Random C. Circular D. All of these
8	When heat is added into the system then change in entropy is	A. negative B. positive C. zero D. any one of them
9	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	A. 1 : 2 B. 2 : 3 C. 3 : 4 D. 8 : 9
10	Specific heat at constant pressure is greater than the specific heat at constant volume because	A. Heat is used up to increase temperature at constant pressure B. Heat is used by gas for expansions purposes at constant pressure C. Heat is use dup to increase internal energy D. The above statement is invalid

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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

When two objects are rubbed together, their internal energy

While deriving equation of pressure by kinetic theory of gases, we take into account:

An isochoric process is one which take place at

In case of an ideal gas, the P.E associated with its molecule is

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

According to the second law, which is must to produce work

Rate of diffusion is

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

If the formula PV = nRT, n denotes:

Rice takes longest to cook

The basis to define a temperature scale that is independent of material properties is provided by

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

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

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

One mole of any substance contain

Which of the following is not thermo dynamical function?

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

Boyle's law is applicable in

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

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

Good absorbers of heat are

The value of E0in coulomb's law is:

In the reverse process, the working substance passes through the same stages as in the direct process and

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

Electromagnetic waves emitted by hot bodies are called:

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

The unit of thermodynamical scale is

The efficiency of diesel engine is

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:

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

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

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

The value of E₀in coulomb's law is:

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: