Which of the following is an example of high grade energy?
Answer: D
These are some examples of the high grade energy.
Enter details here
Adequate insulation must be provided for high temperature fluids.
Answer: A
This is done to prevent heat loss which would be high at high temperatures.
Enter details here
The loss of exergy is more when,
Answer: A
Higher the temperature, more will be the exergy loss.
Enter details here
When the potential gradient is ____, the entropy change of the universe is ____
Answer: B
This makes the process reversible.
Enter details here
The ___ in entropy in an irreversible change is a measure of the extent to which energy ___ in that change.
Answer: B
Also, to get maximum work from a system, changes must be performed in a reversible manner.
Enter details here
The rate at which entropy is transferred out must ____ the rate at which entropy enters the control volume.
Answer: C
The difference is the rate of entropy generated within the control volume owing to irreversibilities.
Enter details here
Which of the following statement is true?
Answer: D
An adiabatic process need not be isentropic, since entropy can also increase due to friction.
Enter details here
Energy is said to be degraded each time it flows through a finite temperature difference.
Answer: A
The exergy is mainly lost due to irreversible heat transfer through a finite temperature difference.
Enter details here
Which of the following is true for a closed system?
Answer: B
For a closed system mass does not change.
Enter details here
If two bodies were allowed to reach thermal equilibrium, one by heat conduction and other by operating a Carnot engine between them and extracting work, the final equilibrium temperatures would be different.
Answer: A
Work is done at the expense of internal energy.
Enter details here