Question 7
Marks : +2 | -2
Pass Ratio : 100%
When Q = 0, there is possibility that
Explanation: For Q = 0, System may be insulated or there is no temperature difference.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Explanation: Q > 0,Heat is gained by the system and transferred from the surrounding.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Q = UA(T2-T1); A formula for heat transfer is given
Explanation: Q < 0, means T2-T1 < 0; Heat is transferred from system.