Questions and answers for exam Preparation

MCQs

Total Questions : 207 | Page 11 of 21 pages

Question 101. How is energy collected in a distributed power system?

Sunlight → line focused collectors → interconnecting pipes → heat engines → turbines → electricity
Line focused collectors → sunlight → interconnecting pipes → heat engines → turbines → electricity
Sunlight → line focused collectors → turbines → interconnecting pipes → heat engines → electricity
Interconnecting pipes → sunlight → line focused collectors → heat engines → turbines → electricity

Discuss Question

Answer: Option A. -> Sunlight → line focused collectors → interconnecting pipes → heat engines → turbines → electricity
Answer: (a).Sunlight → line focused collectors → interconnecting pipes → heat engines → turbines → electricity

Question 102. What is Carnot efficiency?

Rate of the temperature difference divided by rate of initial temperature change
Ratio of relative temperature between source and sink and the relative source temperature
Ratio of absolute temperature between source and sink and the absolute source temperature
Ratio of rate of the temperature difference and the absolute source temperature

Discuss Question

Answer: Option C. -> Ratio of absolute temperature between source and sink and the absolute source temperature
Answer: (c).Ratio of absolute temperature between source and sink and the absolute source temperature

Question 103. Heat engine efficiency increases as the source temperature _______

decreases
remains the same
decrement rate increases
increases

Discuss Question

Answer: Option D. -> increases
Answer: (d).increases

Question 104. Distributed power system is a type of solar thermo-mechanical system.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 105. The type of heat engine depends on _______

material of interconnecting pipes
type of collector
sunlight
photovoltaics

Discuss Question

Answer: Option B. -> type of collector
Answer: (b).type of collector

Question 106. Heat engine efficiency increases with ________ sink temperature.

no change in
decrease in
increment in rate of increasing
increase in

Discuss Question

Answer: Option B. -> decrease in
Answer: (b).decrease in

Question 107. Isothermal process is a process conducted at constant temperature.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 108. Why is the efficiency of Rankine cycle less than that of Carnot cycle?

Because of the working fluid
Because of the turbines
Because all the heat is not supplied at upper temperatures
Because all the heat is supplied at upper temperatures

Discuss Question

Answer: Option C. -> Because all the heat is not supplied at upper temperatures
Answer: (c).Because all the heat is not supplied at upper temperatures

Question 109. How does an ideal Rankine cycle work?

Heat-addition process does not occur at constant temperature
Heat-addition process occurs at temperature
Heat-addition process does not occur at constant pressure
Heat-addition process occurs at constant pressure

Discuss Question

Answer: Option A. -> Heat-addition process does not occur at constant temperature
Answer: (a).Heat-addition process does not occur at constant temperature

Question 110. Which of the following best describes the process of an ideal Rankine cycle?

Working fluid is heated in boiler → exhaust vapour is condensed → vapour runs the turbine → liquid residue is pumped back into boiler
Working fluid is heated in boiler → vapour runs the turbine → exhaust vapour is condensed → liquid residue is pumped back into boiler
Vapour runs the turbine → working fluid is heated in boiler → exhaust vapour is condensed → liquid residue is pumped back into boiler
Exhaust vapour is condensed → Working fluid is heated in boiler → vapour runs the turbine → liquid residue is pumped back into boiler

Discuss Question

Answer: Option B. -> Working fluid is heated in boiler → vapour runs the turbine → exhaust vapour is condensed → liquid residue is pumped back into boiler
Answer: (b).Working fluid is heated in boiler → vapour runs the turbine → exhaust vapour is condensed → liquid residue is pumped back into boiler