Power Plant Engineering Multiple Choice Questions and Answers Pdf - 2

Question: 6

Secondary air is the air used to

(A) provide air round the burners for getting optimum combustion

(B) transport and dry the coal

(C) increase the flame length

(D) reduce the flame length

Question: 7

Topping turbines are

(A) high pressure condensing units

(B) low pressure non condensing units

(C) high pressure non condensing units

(D) low pressure condensing units

Question: 8

In a diesel engine the heat lost to the cooling water is

(A) 10%

(B) 20%

(C) 30%

(D) 70%

Question: 9

Water hammer is developed in a

(A) surge tank

(B) turbine

(C) draft tube

(D) penstock

Question: 10

The percentage O₂ by volume in atmosphere air is

(A) 21%

(B) 23%

(C) 77%

(D) 79%