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	At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be	A. 81 K B. 355 K C. 627 K D. 627°C
2	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
3	Generally a temperature scale is established by using certain physical properties of a material which varies	A. nonlinearly with temperature B. linearly with temperature C. either of them D. none of them
4	When heat is removed from the system	A. negative B. positive C. zero D. any one of them
5	The temperature of gas is produced by	A. At potential energy of its molecules B. The kinetic energy of its molecules C. The attractive force between its molecules D. The repulsive force between its molecules
6	Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:	A. Newton's second law B. Pascal's law C. Carnot theorem D. Second law of thermodynamics
7	If a process cannot be retraced in the backward direction by reversing the controlling factors, it is	A. a reversible process B. an irreversible process C. any one of them D. both of them
8	The earliest heat engine was	A. petrol engine B. diesel engine C. electric engine D. steam engine
9	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
10	Average KE of a gas molecule has:	A. Direct relation with absolute temperature and inverse relation with pressure B. Direction relation with both absolute temperature and pressure C. Inverse relation with both absolute temperature and pressure D. None of these
11	No spark plug is needed in	A. petrol engine B. diesel engine C. both of them D. none of them
12	At constant volume temperature is increased. Then	A. Collision on walls will be less B. Number of collisions per unit time will increase C. Collision will be in straight lines D. Collision will not change
13	If an amount of heat enters the system it could	A. decrease the internal energy B. not change the internal energy C. increase the internal energy D. none of them
14	The number of translation degress of freedom for a diatomic gas is	A. 2 B. 3 C. 5 D. 6
15	An isochoric process is one which take place at	A. Constant internal energy B. Constant entropy C. Constant volume D. Constant pressure
16	Efficiency of carnot engine is independent of the	A. temperature of sink B. temperature of source C. nature of the working substances D. none of them
17	Generally a temperature scale is established by	A. one fixed point B. two fixed point C. three fixed point D. four fixed point
18	In a heat engine, heat is supplied by the	A. cold reservoir B. sink C. hot reservoir D. none of them
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	10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?	A. Each have same number of molecules B. Don't have same number of molecules C. Can't be predicted D. None
21	In an adiabatic process the work is done at the expense of the	A. energy supplied to the system B. energy gained from the surroundings C. internal energy D. none of them
22	The unit of thermodynamical scale is	A. centigrade B. fahrenheit C. kelvin D. none of them
23	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	A. Clausius statement of second law B. Kelvin'sstatement of second law C. Clausius statement of first law D. Kelvin's statement of first law
24	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
25	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
26	First law of thermodynamic is special case of	A. Law of conservation of energy B. Charle's law C. Law of conservation of mass D. Boyle's law
27	The bicycle pump provides a good example of	A. first law of thermodynamics B. second law of thermodynamics C. third law of thermodynamics D. none of them
28	Which of the following is not an assumption of kinetic energy	A. a finite volume of gas consists of very large number of molecules B. the gas molecules are in random motion C. collision between the gas molecules are inelastic D. the size of the gas molecules is much smaller than the separation between molecules
29	At constant temperature, if the density of the gas is increased, its pressure will:	A. One kg of a substance B. Unit volume of a substance C. One mole of a substance D. None of these
30	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%

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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 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

The Boltzman constant has the value

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

Carnot heat engine only used

When two objects are rubbed together, their internal energy

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

In an ideal gas, the molecules have:

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

We can express the work in term of

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

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

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

An isochoric process is one which take place at

Pressure may be define as _______ per second per unit area:

Melting point of ice

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Internal energy is the sum of all the forms of

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

A carnot cycle consists of

In the theory of dimensional analysis, heat may be properly represented by:

If the distance between two charges is doubled, the force between them will become:

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

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

According to kinetic theory of gases, molecules of a gas behave like

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

Pressure exerted by a gas is

The example of reversible process is

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

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

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

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