|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.
Correct Answer: C
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