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	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}
2	At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:	A. Double B. Remains constant C. Half D. None of these
3	The curve representing an adiabatic process is called	A. isotherm B. adiabat C. adiable D. none of them
4	No spark plug is needed in	A. petrol engine B. diesel engine C. both of them D. none of them
5	The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at	A. 546 K B. 273 K C. 546°C D. 273°C
6	Which of the following is not thermo dynamical function?	A. Enthalpy B. Work done C. Gibb's energy D. Internal energy
7	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
8	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
9	The percentage of available heat energy converted into work by a diesel engine is roughly	A. 35 %` B. 40 % C. 35 - 40 % D. 25 %
10	The unit of thermodynamical scale is	A. centigrade B. fahrenheit C. kelvin 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

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

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Average KE of a gas molecule has:

The earliest heat engine was

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

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

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

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

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

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

The Boltzman constant has the value

The value of E0in coulomb's law is:

A reversible cycle is the one in which

We can express the work in term of

Internal energy is the sum of all the forms of

The relationship between Boltzmann constant k with R and NAis given as:

The absolute temperature of the tripple point of water is

No spark plug is needed in

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

Boyle's law is applicable in

Adiabatic change occurs when the gas

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

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

The internal energy of an ideal gas system is generally the

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

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

A succession of events which bring the system back to its initial condition is called

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

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

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ECAT Physics Chapter 11 Important MCQ's

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Bilal A Munir

The value of E₀in coulomb's law is:

The relationship between Boltzmann constant k with R and N_Ais given as: