14. Q5. Figure shows a lawn sprinkler with unequal arms. The jets issuing
out of the sprinkler are of 0.8 cm in diameter and the total discharge is
1.2 L/s.
(a) Assuming zero friction, determine the rotational speed of the
sprinkler
(b) What torque would be required to hold the sprinkler stationary?
15.
16.
17.
18.
19. Q6. A sprinkler with unequal arms and jets of area 0.8 cm² facing in the
same direction is shown in the figure. A flow of 1.5 L/s enters the
assembly normal to the rotating arm.
(i) assuming the frictional resistance to be zero, calculate its speed of
rotation.
(ii) what torque is required to hold it forming rotating?
20.
21.
22. Q7. A four-arm lawn sprinkler, shown in figure has provision for
admitting water at the axis of rotation at a rate of 1.5 L/s. calculate the
steady rotational speed by neglecting friction.
