If a system after undergoing a series of processes, returns to the initial state then
A. Process is thermodynamically in equilibrium
B. Process is executed in closed system cycle
C. Its entropy will change due to irreversibility
D. Sum of heat and work transfer will be zero
Answer: Option D
This Question Belongs to Mechanical Engineering >> Engineering Thermodynamics
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Addition of heat at constant pressure to a gas results in
A. Raising its temperature
B. Raising its pressure
C. Raising its volume
D. Raising its temperature and doing external work
Which of the following items is not a path function?
A. Heat
B. Work
C. Kinetic energy
D. Thermal conductivity
An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is
A. Feasible
B. Impossible
C. Possible
D. Possible, but with lot of sophistications
The absolute zero pressure can be attained at a temperature of
A. 0°C
B. -273°C
C. 273 K
D. None of these
Internal energy for cycle is zero