question_answer

Consider the following statements:

1. A reverse jet protects Pelton turbine from over speeding.

2. Runner blades of Francis turbine are adjustable.

3. Draft tube is used invariably in all reaction turbine installations.

4. Surge tank is a protective device on penstock. Of these statements:

A) 1 and 2 are correct         

B) 2 and 3 are correct

C) 3 and 4 are correct         

D) 1 and 4 are correct.