thermodynamics MCQs

A. one value under some conditions and two values under other conditions

C. three values of specific heat

D. no value of specific heat

A. temperature

C. internal energy

D. entropy

E. pressure

A. two isentropics and two constant volumes

C. two isentropics, one constant volume and one constant pressure

D. none of the above

E. two isothermals and two isentropics

A. Stirling

C. Joule

D. Carnot

E. Ericsson

A. depends on the mass of the system, like volume

C. remains constant

D. is dependent on the path followed and not on the state

E. is not dependent on the path followed but on the state

A. remains unaffected

B. first decreases and then increases

C. first increases and then decreases

E. decreases

A. none of the above

B. more

D. less

E. depends on other factors

A. all of the above

B. heat cant be transferred from low temperature source to high temperature source

C. heat can be transferred for low temperature to high temperature source by using refrigeration cycle.

E. heat can be transferred from low temperature to high temperature source if COP of process is more than unity

A. decrease

C. remain unchanged

D. increase/decrease depending on application

E. unpredictable

A. minimum

B. maximum

D. infinity

E. there is no such criterion

A. any pressure

B. at atmospheric pressure

C. not possible

E. at a pressure below the firuosphejric pressure

A. 1 mm Hg

C. 735.6 mm Hg

D. zero mm Hg

E. 100mm Hg

A. work done is zero

B. heat transfer is zero

D. work done is zero but heat increases

E. work done is zero but heat decreases

A. Diesel cycle

B. Rankine cycle

D. Stirling cycle

E. Dual combustion cycle

A. provides relationship between heat, work and internal energy

B. enables to determine change in internal energy of the system

C. does not help to predict whether the system will or not undergo a change

E. does not enable to determine change in entropy

A. basic law of thermodynamics

B. second law to thermodynamics

C. claussius statement

D. zeroth low of thermodynamic

A. there is no such law

B. Joules Law

D. Boyles Law

E. Charles Law

A. a non-thermodynamic machine

C. a thermodynamic machine

D. an inefficient machine

E. a hypothetical machine

A. Joules law

B. Gay-Lussac law

D. Charleslaw

E. Boyles law

A. when heat is being absorbed, temperature of hot source and working substance should be same

B. when beat is being rejected, temperature of cold source and working sub-stance should be same

C. none of the above

D. free expansion or friction resisted expansion/compression process should not be encountered

A. 1.41

B. 0.21

C. 0.17

E. 1

A. 1.0197 kgf/cm2

C. 0 kgf/cm2

D. 1 kgf/cnr2

E. 100 kgf/cm2

B. Diesel cycle is more efficient than Otto cycle

C. efficiency depends on other factors

D. both Otto and Diesel cycles are equally efficient

E. none of the above

A. hyperbolic and pV = C

B. constant volume and constant pressure

C. throttling

D. free expansion

A. remains constant,if volume and temperature are kept constant

C. volume, if temperature is kept constant

D. temperature

E. absolute

A. mass and energy are mutually convertible

C. Carnot engine is most efficient

D. mass and light are mutually convertible

E. heat flows from hot substance to cold substance

A. two isentropics and two constant pres-sures

B. two isothermals and two isentropics

D. none of the above

E. two isentropics, one constant volume and one constant pressure

A. an adiabatic irreversible cycle

B. a quasi static cycle

C. a semi-reversible cycle

A. Gay-Lussac law

B. Boyles law

C. Regnaults law

D. Joules law

A. the sum of partial pressure of mixture of two gases is sum of the two

B. all systems can be regarded as closed systems

C. gases have two values of specific heat

D. product of the gas constant and the molecular weight of an ideal gas is constant

A. there is no change of internal energy of steam

B. entropy decreases

C. no work is done by expanding steam

D. heat exchange does not take place

A. vdp

B. kinetic energy

C. heat

D. work

B. irreversible engine

C. petrol engine

D. new engine

E. diesel engine

A. joule/s

C. joule/m

D. joule m.

E. watt

A. 1 mm Hg

B. lOOmmHg

D. 760 mm Hg

E. zero mm Hg

A. desirable

B. possible

D. impossible

E. feasible

B. erg

C. newton

D. pascal

E. joule

A. remain unchanged

C. increase/decrease depending on ap-plication

D. unpredictable

E. increase

B. Fahrenheit

C. Centigrade

D. Celsius

E. Rankine

A. none of the above

C. two isentropics, one constant volume and one constant pressure

D. two isentropics and two constant volumes

E. two isothermals and two isentropics

A. perfectly inelastic

C. partly inelastic

D. partly elastic and partly inelastic

E. partly elastic

A. deals with conversion of mass and energy

B. deals with reversibility and irreversibility of process

D. deals with heat engines

E. does not exist

A. temperature

C. pressure

D. volume

E. atomic mass

A. specific volume

B. entropy

C. mass

D. enthalpy

A. 0.15 m3/kg mol

B. 400 m3/kg mol

C. 417m3/kgmol

E. 41.7 m3/kg mol

B. a temperature of 0C

C. a temperature of 273 K

D. a negative pressure and 0C temperature

E. cant be attained

A. at the center of the earth

B. at sea level

D. at a temperature of 273 K

E. under vacuum conditions

A. 2

C. 0.75

D. 1.35

E. 1.27

A. density

B. specific volume

D. pressure

E. temperature

A. system properties

C. point functions

D. intensive properties

E. extensive properties