Power Plant Engineering Mock Test 2

10%

Question 1 of 10

1. Which of the following needs to be incorporated to prevent the low pressure turbine exhaust wetness from being excessive?

Double cooling

Double regeneration

Double reheat

Double carnotization

Question 1 of 10

Question 2 of 10

2. The output from boiler goes to?

Pump

Turbine

Condenser

Economiser

Question 2 of 10

Question 3 of 10

3. Closed heaters are ______________ heat exchangers.

parallel flow

counter flow

cross- flow

shell-and-tube

Question 3 of 10

Question 4 of 10

4. The feedwater in the Economiser _________

is heated by outgoing flue gases

is heated by bled turbine steam

is cooled by bled turbine steam

is cooled by outgoing flue gases

Question 4 of 10

Question 5 of 10

5. What is the basic principle of regeneration?

Steam after coming out of turbine is circulated to boiler

Two stage turbine is used

Steam after coming out of condenser is circulated to boiler

Steam after coming out of condenser is circulated to turbine

Question 5 of 10

Question 6 of 10

6. The expression for the overall temperature difference T_OA is given by?

t_OA = boiler saturation temperature x condenser temperature

t_OA = boiler saturation temperature / condenser temperature

t_OA = boiler saturation temperature - condenser temperature

t_OA = boiler saturation temperature + condenser temperature

Question 6 of 10

Question 7 of 10

7. If n denotes the number of heater, t_OA denotes the overall temperature difference & T_fw denotes the total temperature rise of feedwater. The expression for T_fw is?

(n/(n-1)) x t_OA

(n/(n+1)) / t_OA

(n/(n+1)) x t_OA

(n/(n+1)) - t_OA

Question 7 of 10

Question 8 of 10

8. The input to the low pressure feedwater heater is from?

Drain pipe

None of the mentioned

Drain heater

Drain cooler

Question 8 of 10

Question 9 of 10

9. The expression for efficiency when a & b are two constants corresponding to alpha & beta and c corresponds to gamma, is?

Efficiency = ((b²))/((b + c)(a + b - c)))

Efficiency = 1 / ((b²))/((b + c)(a + b - c)))

Efficiency = 1 + ((b²))/((b + c)(a + b - c)))

Efficiency = 1 - ((b²))/((b + c)(a + b - c)))

Question 9 of 10

Question 10 of 10

10. Expand TTD?

turbine terminal difference

total temperature difference

terminal temperature difference

turbine temperature difference

Question 10 of 10