Agricultural/Bioengineering Irrigation and Drainage Engineering

Question 1

Which irrigation method delivers water directly to the root zone of individual plants through emitters?

Accepted Answer

Drip or trickle irrigation

Answer

Flood irrigation

Answer

Sprinkler irrigation

Answer

Furrow irrigation

Question 2

Irrigation efficiency is defined as the ratio of:

Accepted Answer

Water beneficially used by crops to water delivered to the field

Answer

Water applied to water evaporated

Answer

Total rainfall to irrigation water

Answer

Soil moisture to field capacity

Question 3

The concept of 'consumptive use' or evapotranspiration (ET) refers to:

Accepted Answer

Total water used by plants through transpiration plus soil evaporation

Answer

Water lost to deep drainage below the root zone

Answer

Runoff leaving the irrigated field

Answer

Water stored in the soil profile

Question 4

Which drainage system uses perforated pipes buried below the soil surface to remove excess water?

Accepted Answer

Subsurface tile drainage

Answer

Surface drainage

Answer

Mole drainage only

Answer

Open ditch drainage

Question 5

In furrow irrigation, water is applied by:

Accepted Answer

Flowing through small channels between crop rows

Answer

Flooding the entire field surface uniformly

Answer

Spraying water from overhead nozzles

Answer

Dripping water at plant bases

Question 6

Field capacity is defined as the soil water content after:

Accepted Answer

Rapid drainage following saturation has essentially ceased

Answer

Prolonged drought stress

Answer

Maximum plant water uptake

Answer

Complete evaporation from the surface