Quality of Energy - MCQs with Answers

Q1. Consider the same heat loss to the surrounding at temperature T0 is occurring from the systems A and B at different temperatures T1 and T2 respectively. If T1 is greater than T2, what is the loss of exergy in both the systems?

a. loss of exergy is more in system A than system B
b. loss of exergy is more in system B than system A
c. loss of exergy is same is both systems A and B
d. cannot say

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ANSWER: a. loss of exergy is more in system A than system B



Q2. As the temperature difference between system and surroundings decreases the quality of the energy which is being transferred

a. increases
b. decreases
c. remains same
d. none of the above

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ANSWER: b. decreases



Q3. Which concept provides the useful measure of quality of energy?

a. entropy
b. exergy
c. energy
d. none of the above

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ANSWER: b. exergy


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