# Steam Power Plant - Vapour & Gas Power Cycle - MCQs with Answers

## Steam Power Plant - Vapour & Gas Power Cycle - MCQs with Answers

Q1. When two vapor cycles are coupled in series and heat rejected by one is absorbed by another, the cycle is called as

a. Dual vapour cycle
b. Binary vapour cycle
c. Coupled vapour cycle
d. none of the above

Q2. In binary vapour cycle, the cycle which is operated in high pressure ratio is called as

a. bottoming cycle
b. topping cycle
c. upper cycle
d. pressure cycle

Q3. What is the correct formula for brake efficiency of the turbine in vapour power cycle?
Where out flow is as following,

Ideal output(Actual work given to turbine) ----> Internal losses ----> Internal output (Actual work produced by turbine turbine) ----> External losses -----> Brake output (Actual work at the shaft)

a. ηBrake = Brake output / Ideal output
b. ηBrake = Brake output / Internal output
c. ηBrake = Ideal output / Brake output
d. ηBrake = Internal output / Brake output

ANSWER: a. ηBrake = Brake output / Ideal output

Q4. What is the relation between brake efficiency, internal efficiency and mechanical efficiency?

a. ηInternal = ηMech * ηBrake
b. ηMech = ηInternal * ηBrake
c. ηBrake = ηInternal * ηMech
d. none of the above