Top 150+ Solved Irrigation Engineering MCQ Questions Answer

From 121 to 135 of 198

Q. The aqueduct or superpassage type of works are generally used when

a. high flood drainage discharge is small

b. high flood drainage discharge is large and short lived

c. high flood drainage discharge is large and continues for a long time

d. none of the above

  • a. high flood drainage discharge is small

Q. An aggrading river is a

a. silting river

b. scouring river

c. both silting and scouring river

d. neither silting nor scouring river

  • a. silting river

Q. Tortuosity of a meandering river is the ratio of

a. meander belt to meander length

b. meander length to meander belt

c. curved length along the channel to the direct axial length of the river reach

d. direct axial length of the river reach to curved length along the channel

  • c. curved length along the channel to the direct axial length of the river reach

Q. The meander pattern of a river is developed by

a. average discharge

b. dominant discharge

c. maximum discharge

d. critical discharge

  • b. dominant discharge

Q. The main cause of meandering is

a. presence of an excessive bed slope in the river

b. degradation

c. the extra turbulence generated by the excess of river sediment during floods

d. none of the above

  • c. the extra turbulence generated by the excess of river sediment during floods

Q. Tortuosity of a meandering river is always

a. equal to 1

b. less than 1

c. greater than 1

d. less than or equal to 1

  • c. greater than 1

Q. Select the correct statement.

a. A meander increases the river length but a cut off reduces the river length.

b. A cutoff increases the river length but a meander reduces the river length.

c. Both meander and cutoff increase the river length.

d. Both meander and cutoff decrease the river length.

  • a. A meander increases the river length but a cut off reduces the river length.

Q. River training for depth is achieved by

a. groynes

b. construction of dykes or leavees

c. both (a) and (b)

d. groynes and bandalling

  • d. groynes and bandalling

Q. Main purpose of mean water training for rivers is

a. flood control

b. to provide sufficient depth of water in navigable channels, during low water periods

c. to preserve the channel in good shape by efficient disposal of suspended and bed load

d. all of the above

  • c. to preserve the channel in good shape by efficient disposal of suspended and bed load

Q. A repelling groyne is aligned

a. pointing upstream

b. pointing downstream

c. perpendicular to bank

d. parallel to bank

  • a. pointing upstream

Q. A river training work is generally required when the river is

a. aggrading type

b. degrading type

c. meandering type

d. both (a) and (b)

  • c. meandering type

Q. A river bend characterized by silting

a. scouring on concave side

b. silting on convex side

c. scouring on convex side and on concave side

d. scouring on concave side and silting on convex side

  • d. scouring on concave side and silting on convex side
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