A. when the permanent wilting point is reached
B. when gravity drainage has ceased
C. capillary fringe reaches the root zone of plants
D. none of the above
Related Mcqs:
- Which of the following methods of applying water may be used on rolling land ?
A. boarder flooding
B. check flooding
C. furrow flooding
D. free flooding - The ratio of the quantity of water stored in the root zone of the crops to the quantity of water actually delivered in the field is known as__________________?
A. water conveyance efficiency
B. water application efficiency
C. water use efficiency
D. none of the above - If the intensity of rainfall is more than the infiltration capacity of soil, then the infiltration rate will be______________?
A. equal to rate of rainfall
B. equal to infiltration capacity
C. more than rate of rainfall
D. more than infiltration capacity - A multipurpose reservoir is the one which is_________________?
A. designed for one purpose but serves more than one purpose
B. planned and constructed to serve various purposes
C. both (A. and (B.
D. none of the above - The sensitivity of a rigid module is_______________?
A. zero
B. between zero and one
C. 1
D. infinity - A runoff river plant_________________?
A. is a medium head scheme
B. generates power during peak hours only
C. is suitable only on a perennial river
D. has no pondage at all - The net head under which the turbine reaches its peak efficiency at synchronous speed is called________________?
A. design head
B. rated head
C. gross head
D. operating head - Which of the following can be used as a meter fall ?
A. vertical drop fall
B. flumed glacis fall
C. unflumed glacis fall
D. all of the above - The total capacity of a reservoir is 25 million cubic metres and dead storage is 5 million cubic metres. If the average volume of sediment deposition is 0.10 million cubic metre per year, then the usefulness of the reservoir will start reducing after_________________?
A. 50 years
B. 150 years
C. 200 years
D. 250 years - Hydrograph is the graphical representation of________________?
A. runoff and time
B. surface runoff and time
C. ground waterflow and time
D. rainfall and time
