811. A series of vertical steps in a stream made to avoid soil scouring is called ___________________?

A. Levees
B. Embankment
C. Cascades
D. Banks

812. Water logging and soil salinization is a twin menace which has effected the agriculture sector severely, about _______________ hectares of land are wasted yearly?

A. 30,000
B. 35,000
C. 40,000
D. 45,000

813. The process to dilute the available salts from root Zone by providing simply canal water is known as __________________?

A. Reclamation
B. Leaching
C. Recultivation
D. de-salting

814. The run-off from catchment areas, Roads, buildings and other fallow lands is called ____________________?

A. Rain water
B. Surface run-off
C. Storm water
D. Dry weather flow

815. Water logging caused by ____________ water, which during excessive irrigation percolates down and join under ground water table?

A. Capillary
B. Hygroscopic
C. Gravity
D. Free

816. For an economical design of gravity dam, the shear friction factor causec compression strength should lie between____________________?

A. 1.5 to 4.0
B. 2.0 to 4.0
C. 2.5 to 4.5
D. 3 to 5

817. The field capacity is the amount of water retained by a saturated soil mass after being acted by gravity. The amount of water required to bring the soil moisture content of that soil up to field capacity is called__________________?

A. Soil-moisture deficiency
B. Field-moisture deficiency
C. Equivalent-moisture deficiency
D. a and b are correct

818. The maximum rate at which the soil in given condition can absorb water is called ___________________?

A. Field Capacity
B. Capillarity
C. Infiltration capacity
D. All are correct

819. The science of water which deals with the depletion and replenishment of water resources is called_________________?

A. Hydrology
B. Biology
C. Hydrography
D. Histology

820. The ratio between the force causing a body to slide along a plane and the force normal to the plane is called __________________?

A. Coefficient of friction
B. Coefficient of internal friction
C. Coefficient of resistance
D. All are correct