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	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	The work done on the system by the environment is considered as	A. positive B. negative C. zero D. any one of them
3	The ideal gas law is	A. P = nRT B. V = nRT C. PV =RT D. PV =nRT
4	Electromagnetic waves emitted by hot bodies are called:	A. Photoelectrons B. Alpha rays C. Thermal radiation D. None of these
5	If a liquid is heated in weightlessness, the heat is transmitted through	A. Conduction B. Convection C. Radiation D. Neither, because the liquid cannot be heated in weightlessness
6	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
7	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
8	A carnot cycle consists of	A. One step B. two step C. three steps D. four steps
9	The motion of molecules in gases is:	A. Orderly B. Random C. Circular D. All of these
10	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
11	The curve representing an adiabatic process is called	A. isotherm B. adiabat C. adiable D. none of them
12	Gas constant per molecule is called:	A. Universal gas constant B. Stefen's constant C. Boltzmann constant D. Gravitation constant
13	When heat is removed from the system	A. negative B. positive C. zero D. any one of them
14	A typical four stroke petrol engine undergoes how many successive processes in each cycle	A. one B. two C. three D. four
15	Pressure of a gas at constant volume is proportion to	A. Total energy of gas B. Average P.E to molecules C. Average K.E of molecules D. Total internal energy of gas
16	In an adiabatic expansion, the temperature of the gas	A. increases B. becomes zero C. decreases D. decreases rapidly
17	An isochoric process is one which take place at	A. Constant internal energy B. Constant entropy C. Constant volume D. Constant pressure
18	The absolute temperature for an ideal gas is	A. directly proportional to the rotational K.E of gas molecules B. directly proportional to the vibrational K.E of gas molecules C. directly proportional to the average translational K.E.of gas molecules D. directly proportional to the P.E. of gas molecules
19	Which of the following is not an example of adiabatic process	A. the rapid escape of air from a burst type B. the rapid expansion and compression of air through which a sound wave is passing C. cloud formation in the atmosphere D. none of them
20	In a heat engine, heat is supplied by the	A. cold reservoir B. sink C. hot reservoir D. none of them
21	In the study of thermodynamics, which gas is considered as the working substance	A. real gas B. ideal gas C. any gas may be ideal or real D. none of them
22	Maximum density of H₂O is at the temperature	A. 32°F B. 39.2°F C. 42°F D. 4°F
23	On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands	A. adiabatically B. isothermally C. isochorically D. isobarically
24	Hotness and coldness of an object is represented in terms:	A. Heat B. Temperature C. Chemical energy D. None of these
25	Melting point of ice	A. Increases with increasing pressure B. Decreases with increasing pressure C. Is independent of pressure D. Is proportional to pressure
26	Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called	A. heat capacity B. specific heat capacity C. specific heat at constant volume D. specific heat at constant pressure
27	The value of E₀in coulomb's law is:	A. 9 x 10⁹Nm²C^-2 B. 8.85 x 10^-12C²N^-1m^-2 C. 8.85 x 10^-12Nm²C^-2 D. 9 x 10⁹C²N^-1m^-2
28	Generally a temperature scale is established by	A. one fixed point B. two fixed point C. three fixed point D. four fixed point
29	The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at	A. 100 K B. 273 K C. 0 K D. -273 K
30	We can express the work in term of	A. directly measurable variables B. indirectly measurable variables C. either of them D. both 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

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

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

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

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

In the formula P = N0KT, N0denotes:

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

Energy gas behaves like an ideal gast at

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

Which of the following is a state variable

On colliding in a closed container, the gas molecules

Which of the following is not an example of adiabatic process

At absolute temperature, the kinetic energy of the molecules

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

First law of thermodynamic is special case of

In thermodynamics, internal energy is the function of

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

The internal energy of an ideal gas system is generally the

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

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

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

In an adiabatic expansion, the temperature of the gas

The bicycle pump provides a good example of

Internal energy is the sum of all the forms of

Carnot heat engine only used

We can express the work in term of

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

The state in which ice, water and vapour coexists in equilibrium is called

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

A real gas can be approximated to an ideal gas at

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In the formula P = N₀KT, N₀denotes:

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