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 absolute temperature of the tripple point of water is	A. 100°C B. 4°C C. 373 K D. 273.16 K
2	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
3	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
4	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
5	The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is	A. 70% B. 100% C. 35% D. 38%
6	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	A. A greater than than of B B. A is equal to that of B C. A is less than that of B D. A is twice the pressure of B
7	Pressure may be define as _______ per second per unit area:	A. Change in force B. Change in momentum C. Change in energy D. Work done
8	A succession of events which bring the system back to its initial condition is called	A. reversible process B. irreversible process C. a cycle D. none of them
9	In an ideal gas, the molecules have:	A. Kinetic energy only B. Potential energy only C. Both KE and PE D. None of these
10	We cannot utilize the heat contents of oceans and atmosphere because	A. there is no reservoir at the same temperature B. there is no reservoir at the temperature lower than any one of two C. there is no reservoir at the temperature higher than any one of two 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

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 of a gas at constant volume is proportion to

A real gas can be approximated to an ideal gas at

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

If a liquid is heated in weightlessness, the heat is transmitted through

When two objects are rubbed together, their internal energy

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

Specific heat at constant pressure is greater than the specific heat at constant volume because

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

Triple point of water is

Sadi carnot described an ideal heat engine in

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

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

The temperature of gas is produced by

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Rice takes longest to cook

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

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

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

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

Hotness and coldness of an object is represented in terms:

Carnot heat engine only used

No spark plug is needed in

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

The bicycle pump provides a good example of

Heat travels through vacuum by

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

At absolute temperature, the kinetic energy of the molecules

Brownian motion increases due to

Which of the following is a state variable

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ECAT Physics Chapter 11 Important MCQ's

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