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.Management Sciences
Category: Thermodynamics
In an isothermal process, the internal energy________________?
A. increases
B. decreases
C. remains constant
D. first increases and then decreases
E. first decreases and then increases
Otto cycle consists of following four processes____________________?
A. two isothermals and two isentropics
B. two isentropics and two constant volumes
C. two isentropics, one constant volume and one constant pressure
D. two isentropics and two constant pres-sures
E. none of the above
Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be ____________________?
A. 4.17m3/kgmol
B. 400 m3/kg mol
C. 0.15 m3/kg mol
D. 41.7 m3/kg mol
E. 417m3/kgmol
For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be___________________?
A. zero
B. minimum
D. maximum
D. infinity
E. there is no such criterion
Which of the following quantities is not the property of the system__________________?
A. pressure
B. temperature
C. specific volume
D. heat
E. density
The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will______________?
A. increase
B. decrease
C. remain unchanged
D. increase/decrease depending on ap-plication
E. unpredictable
During throttling process___________________?
A. heat exchange does not take place
B. no work is done by expanding steam
C. there is no change of internal energy of steam
D. all of the above
E. entropy decreases
A heat exchange process in which the product of pressure and volume remains constant is known as_______________?
A. heat exchange process
B. throttling process
C. isentropic process
D. adiabatic process
E. hyperbolic process
Characteristic gas constant of a gas is equal to______________________?
A. C/Cv
B. Cv/Cp
C. Cp – Cv
D. Cp + Cv
E. Cp x Cv
According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant ____________________?
A. Joule’s law
B. Boyle’s law
C. Regnault’s law
D. Gay-Lussac law
E. Charles’ law
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