The net head under which the turbine reaches its peak efficiency at synchronous speed is called________________?

A. demand cannot be met by inflow
B. reservoir was not full at the beginning
C. both (A) and (B)
D. none of the above

A. depends on depth of approach and upstream slope
B. depends on downstream apron interference and downstream submergence
C. remains constant
D. both (A) and (B)

A. slope-area method
B. area-velocity method
C. moving boat method
D. ultra-sonic method

A. hydrodynamic pressure
B. inertia force into the body of the dam
C. both (A) and (B)
D. none of the above

A. 1.2 D
B. 1.5 D
C. 2.0 D
D. 2.5 D

A. capacity/inflow ratio
B. capacity/outflow ratio
C. outflow/inflow ratio
D. none of the above