500 Best Irrigation Engineering MCQ
Q9). The amount of water required to fill up the pore spaces in soil particles by replacing all air held in pore spaces, is known as
a).field capacity
b).saturation capacity
c).available moisture
d).all of these
Correct Answer:
saturation capacity
Explanation:
Q10). The moisture content of the soil, after free drainage has removed most of the gravity water, is known as
a).field capacity
b).saturation capacity
c).wilting coefficient
d).available moisture
Correct Answer:
field capacity
Explanation:
Q11). The water content at which plants can no longer extract sufficient water from the soil for its growth is called
a).field capacity
b).saturation capacity
c).permanent wilting coefficient
d).available moisture
Correct Answer:
permanent wilting coefficient
Explanation:
Q12). Available moisture may be defined as the
a).moisture content at permanent wilting point
b).difference in water content of the soil between field capacity and permanent wilting
c).maximum moisture holding capacity
d).all of these
Correct Answer:
difference in water content of the soil between field capacity and permanent wilting
Explanation:
Q13). The field capacity of a soil depends upon
a).capillary tension in soil
b).porosity of soil
c).either A or B
d).both A and B
Correct Answer:
both A and B
Explanation:
Q14). The consumptive use of water of a crop
a).is measured as the volume of water per unit area
b).is measured as depth of water on irrigated area
c).may be supplied partly by precipitation and partly by irrigation
d).none of the above
Correct Answer:
may be supplied partly by precipitation and partly by irrigation
Explanation:
Q15). The ratio between the area of a crop irrigated and the quantity of water required during its entire period of growth is known as
a).delta
b).duty
c).base period
d).crop period
Correct Answer:
duty
Explanation:
Q16). The total depth of water required by a crop during the entire period the crop is in the field, is known as
a).delta
b).duty
c).base period
d).crop period
Correct Answer:
delta
Explanation: