STEAM BOILERS, ENGINES, NOZZLES AND TURBINES QUIZ

Steam may be wet, dry or superheated after expansion

Work is done

All of these

Heat transfer takes place across cylinder walls

270°

60°

180°

90°

Connecting rod

Piston rod

Valve rod

Eccentric rod

Brake thermal efficiency

Overall efficiency

Mechanical efficiency

Indicated thermal efficiency

All of these

Increases the work-done through the turbine

Reduces wear on the blades

Increases the efficiency of the turbine

Rising characteristic

Linear characteristic

Drooping characteristic

Flat characteristic

2000-4000 kcal/ kg

5000-8000 kcal/ kg

800-1200 kcal/ kg

200-400 kcal/ kg

(p₂/p₁) = [2/(n - 1)] n/(n + 1)

(p₂/p₁) = [2/(n + 1)] n/(n-1)

(p₂/p₁) = [(n + 1)/2] n - (1/n)

(p₂/p₁) = [(n - 1)/2] n + (1/n)

All of these

Mass of the steam discharged increases

Entropy and specific volume of the steam increases

Exit velocity of steam reduces

p₁ + p₂

p₁. p₂

p₂/p₁

p₁/p₂