Hydraulic Machines

1: The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

A. `(2(V_r - V)V)/(V_1^2)`

B. `(2(V_r + V)V)/(V_1^2)`

C. `((V_r - V)V)/(V_r)`

D. `((V_r + V)V)/(V_r)`

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2: A jet of water enters and leaves a fixed curved vane tangentially. The force of the jet along normal to the vane is (where `alpha` and `beta` = Inlet and outlet angles of the jet respectively)

A. `(waV^2)/(g) (cos alpha - cos beta)`

B. `(waV^2)/(g) (cos alpha + cos beta)`

C. `(waV^2)/(g) (sin alpha + sin beta)`

D. `(waV^2)/(g) (sin alpha - sin beta)`

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A. `N/sqrt(H)`

B. `N/H`

C. `N/H^(3//2)`

D. `N/H^2`

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A. `(D)/(2d) + 5`

B. `(D)/(2d) + 10`

C. `(D)/(2d) +15`

D. `(D)/(2d) + 20`

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5: The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

A. `(wa(V -v))/(2g)`

B. `(wa(V -v))/(g)`

C. `(wa(V -v)^2)/(2g)`

D. `(wa(V -v)^2)/(g)`

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