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.Management Sciences
Category: Thermodynamics
In order that a cycle be reversible, following must be satisfied ________________?
A. free expansion or friction resisted expansion/compression process should not be encountered
B. when heat is being absorbed, temperature of hot source and working sub¬stance should be same
C. when beat is being rejected, temperature of cold source and working sub-stance should be same
D. all of the above
E. none of the above
According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as____________________?
A. temperature
B. absolute
C. absolute temperature, if volume is kept constant
D. volume, if temperature is kept constant
E. remains constant,if volume and temperature are kept constant
Boyle’s law i.e. pV = constant is applicable to gases under ___________________?
A. all ranges of pressures
B. only small range of pressures
C. high range of pressures
D. steady change of pressures
E. atmospheric conditions
I kgf/cm2 is equal to________________?
A. 760 mm Hg
B. zero mm Hg
C. 735.6 mm Hg
D. 1 mm Hg
E. lOOmmHg
Extensive property of a system is one whose value______________________?
A. depends on the mass of the system like volume
B. does not depend on the mass of the system, like temperature, pressure, etc.
C. is not dependent on the path followed but on the state
D. is dependent on the path followed and not on the state
E. is always constant
In a Carnot cycle, heat is transferred at_______________________?
A. constant pressure
B. constant volume
C. constant temperature
D. constant enthaply
E. any one of the above
In a non-flow reversible process for which p = (- 3V+ 15) x 105N/m2,V changes from 1 m to 2 m3. The work done will be about_______________?
A. 100 xlOO5 joules
B. lxlO5 joules
C. 10 xlO5 joules
D. 10 xlO5 kilo joules
E. 10xl04kiojoules
If value of n is infinitely large in a polytropic process pV” = C, then the process is known as constant_____________________?
A. volume
B. pressure
C. temperature
D. enthalpy
E. entropy
Kelvin Planck’s law deals with___________________?
A. conservation of heat
B. conservation of work
C. conversion of heat into work
D. conversion fo work into heat
E. conservation of mass
The pressure’of a gas in terms of its mean kinetic energy per unit volume E is equal to________________?
A. E/3
B. E/2
C. 3E/4
D. 2E/3
E. 5E/4
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