#### 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)

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)

3

The unit speed of the turbine runner is

A. N/sqrt(H)
B. N/H
C. N/H^(3//2)
D. N/H^2

4

The number of buckets on the periphery of a Pelton wheel is given by

A. (D)/(2d) + 5
B. (D)/(2d) + 10
C. (D)/(2d) +15
D. (D)/(2d) + 20

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)