SSC JE Mechanical Engineering 2018 Set 3 Paper

Question : 198 of 200

Marks: +1, -0

The figure given below shows the relationship between power (P) and discharge (Q) for different vane exit angles of centrifugal pump. In the figure given below, curve c holds good for:

vane exit angle of 90°
vane exit angle of less than 90°
vane exit angle of more than 90°
any vane exit angle

Validate

Solution:

For forward blade, blade angle

(β) > 90°

for radial blade, blade angle

(β) = 90°

for backward blade, angle

(β) < 90°

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