# Full load is supplied by the turbine shaft when the diameter of jet

Full load is supplied by the turbine shaft when the diameter of jet issuing from the nozzle is 150 mm. If the load suddenly drops to 36% of the full l

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## A full load is supplied by the turbine shaft when the diameter of the jet issuing from the nozzle is 150 mm. If the load suddenly drops to 36% of the full load, what diameter of the jet should be attained by regulating the spear rod?

### Detailed Solution for Civil Engineering Exam

Upon change in load: discharge is varied by varying the area of jet

Q1 = Q

Velocity of jet remains constant.

Q2 = 0.36Q

AT 36% of full load, d = d2

Q = A * V1 = (π/4)d2 * V1

V1 = constant, Q ∝ d2

Q2/Q1 = (d2/d1)2

0.36 = (d2/150)2

d2/150 = 0.6

d2 = 90 mm

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