ECAT Pre Engineering Physics Chapter 11 MCQ Test With Answer

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Sr. #	Question	Answer
1	The basis to define a temperature scale that is independent of material properties is provided by	A. carbon cycle B. nitrogen cycle C.Carnot cycle D. irreversible cycle
2	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
3	If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy	A. 0 J B. 2 J C.5 J D. 10 J
4	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	A. P=P/V<1/2mv²> B. P=2N/V<1/2mv²> C.P=2/3N/V<1/2mv²> D. P=2/3N/V<mv²>
5	The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :	A. 1.7 x 10³J B. 10.2 x 10³J C.3..4 x 10³J D. 6.8 x 10³J
6	The example of irreversible process is	A. slowly liquification B. slowly evaporation C.an explosion D. all of them
7	If the distance between two charges is doubled, the force between them will become:	A. Double B. Half C.Three times D. One fourth
8	If the volume of the gas is to be increased by 4 times, then	A. Temperature and pressure must be doubled B. At constant P the temperature must be increased by 4 times C.At constant T the pressure must be increased by four times D. It cannot be increased
9	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	A. R/2 B. P C.2P D. Depending on the relative mass of the gases
10	The earliest heat engine was	A. petrol engine B. diesel engine C.electric engine D. steam engine
11	Absolute temperature can be calculated by	A. Means squares velocity B. Motion of the molecule C.Both A and B D. None of these
12	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
13	Gas constant per molecule is called:	A. Universal gas constant B. Stefen's constant C.Boltzmann constant D. Gravitation constant
14	Maximum density of H₂O is at the temperature	A. 32°F B. 39.2°F C.42°F D. 4°F
15	The percentage of available heat energy converted into work by a diesel engine is roughly	A. 35 %` B. 40 % C.35 - 40 % D. 25 %
16	Absolute zero is considered as that temperature at which:	A. All liquid become gases B. All gases become liquid C.Water freezes D. None of these
17	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	A. second law thermodynamics B. first law of thermodynamics C.third law of thermodynamics D. none of them
18	Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:	A. N = nN_Am = MN_A B. n = N N_A, M = mN_A C.M = N_A/N , N_A= m/n D. N = nN_A, M = mN_A
19	Brownian motion increases due to	A. Increase in size of Brownian particle B. Increase in temperature of medium C.Increase in density of medium D. Increase in viscosity of medium
20	Energy gas behaves like an ideal gast at	A. High temperature and low pressure B. Low temperature and high pressure C.Both A and B D. None
21	In thermodynamics, internal energy is the function of	A. temperature B. pressure C.state D. none of them
22	Generally a temperature scale is established by	A. one fixed point B. two fixed point C.three fixed point D. four fixed point
23	One kilogram of different substances contain	A. same number of molecules B. different number of molecules C.may be same or different D. none of them
24	What temperature is the same on Celsius scale as well as on Fahrenheit scale?	A. 32°C B. -32°C C.-40°C D. -212°C
25	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
26	Which of the following is a state variable	A. entropy B. pressure C.volume D. all of them
27	Good absorbers of heat are	A. Poor emitters B. Non emitters C.Good emitters D. Highly polarized
28	The nature of thermal radiation is similar to:	A. Ultraviolet rays B. Light rays C.Both of them D. None of these
29	The second law of thermodynamics is concerned with the circumstances in which	A. heat can be converted into work B. direction of flow of heat C.none of them D. both of them
30	Pressure exerted by a gas is	A. Independent of density of the gas B. Inversely proportional to the density of the gas C.Directly proportional to the square of the density of the gas D. Directly proportional to the density of the gas

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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

Energy gas behaves like an ideal gast at

No spark plug is needed in

The value of E0in coulomb's law is:

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

The pressure exerted by the gas is

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 Boltzman constant has the value

Electromagnetic waves emitted by hot bodies are called:

In the formula P = N0KT, N0denotes:

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

A reversible cycle is the one in which

When two objects come to common temperature, the body is said to be in:

If an amount of heat enters the system it could

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

Pressure of a gas at constant volume is proportion to

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

First law of thermodynamics is consequence of conservation of

An isochoric process is one which take place at

Average KE of a gas molecule has:

Which quantity is important in stating the entropy of the system

Rice takes longest to cook

We cannot utilize the heat contents of oceans and atmosphere because

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

The internal energy of an ideal gas system is generally the

The heat required to raise the temperature of one mole of the substance through 1 K is called

Which of the following is not an assumption of kinetic energy

Adiabatic change occurs when the gas

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

A diatomic gas molecule has

The earliest heat engine was

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

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The value of E₀in coulomb's law is:

In the formula P = N₀KT, N₀denotes: