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 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
2	During the whole carnot cycle	A. Thermal equilibrium is maintained B. mechanical equilibrium is maintained C. both the thermal and mechanical equilibriumis maintained D. both the thermal and mechanical equilibrium is not maintained
3	Which of the following is not thermo dynamical function?	A. Enthalpy B. Work done C. Gibb's energy D. Internal energy
4	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
5	In all natural processes where heat flows from one system to another, there is always a net	A. decrease in entropy B. increase in entropy C. decrease or increase in entropy D. none of them
6	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
7	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
8	Rice takes longest to cook	A. In a submarine 100 m below the surface of the sea B. At sea level C. At Murree D. At Mount Everest
9	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	A. 300°C B. 573°C C. 600°C D. 743°C
10	Which of the following does not have the same units:	A. Work B. Heat C. Kinetic energy D. Power

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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

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

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

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

Pressure exerted by a gas is

If a molecule with momentum mv strikes a wall and rebound then the change in momentum 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

Generally a temperature scale is established by using certain physical properties of a material which varies

Amount of heat required to raise the temperature of a body through 1 K is called its

In an adiabatic process the work is done at the expense of the

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

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

The second law of thermodynamics is concerned with the circumstances in which

Adiabatic change occurs when the gas

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

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

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Heat travels through vacuum by

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

The example of irreversible process is

A diatomic gas molecule has

Internal energy is the sum of all the forms of

Gas constant per molecule is called:

A reversible cycle is the one in which

The behaviour of gases is well accounted by the kinetic theory based on

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

First law of thermodynamics is consequence of conservation of

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:

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

Maximum density of H2O is at the temperature

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ECAT Physics Chapter 11 Important MCQ's

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

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:

Maximum density of H₂O is at the temperature