On weight basis, air contains following parts of oxygen_________________?
On weight basis, air contains following parts of oxygen_________________?
A. 21
B. 23
C. 25
D. 73
E. 79
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The value of n = 1 in the poly tropic process indicates it to be __________________?
The value of n = 1 in the poly tropic process indicates it to be __________________?A. reversible process
B. isothermal process
C. adiabatic process
D. irreversible process
E. free expansion processEntropy change depends on___________________?
Entropy change depends on___________________?A. heat transfer
B. mass transfer
C. change of temperature
D. thermodynamic state
E. change of pressure and volumeThe door of a running refrigerator inside a room was left open____________________?
The door of a running refrigerator inside a room was left open____________________?Which of the following statements is correct ?
A. The room will be cooled to the temperature inside the refrigerator.
B. The room will be cooled very slightly.
C. The room will be gradually warmed up.
D. The temperature of the air in room will remain unaffected.
E. any one of above is possible depending on the capacityZeroth law of thermodynamics________________?
Zeroth law of thermodynamics________________?A. deals with conversion of mass and energy
B. deals with reversibility and irreversibility of process
C. states that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other
D. deals with heat engines
E. does not existCarnot cycle efficiency depends upon________________?
Carnot cycle efficiency depends upon________________?A. properties of the medium/substance used
B. condition of engine
C. working condition
D. temperature range of operation
E. effectiveness of insulating material around the engineWhich of the following is the property of a system___________________?
Which of the following is the property of a system___________________?A. pressure and temperature
B. internal energy
C. volume and density
D. enthalpy and entropy
E. all of the above