Target GATE 2022 (Irrigation Engineering)

 Q.1 For an irrigated field having field capacity = 30%, P.W.P = 10%, permissible depletion of available water = 40%, dry unit weight of soil = 14.7 kN/m^3 and effective rainfall = 30 mm, what is the net irrigation requirement per meter depth of soil?

(a)  300 mm              (b) 150 mm        (c) 120 mm       (d) 90 mm

Q.2 Consider the following statements:

Irrigation water has to be supplied to the crops when the moisture level falls

1. below field capacity

2. to wilting point

3. below wilting point

Which of the above statements is/are correct?

(a) 1                       (b) 2 only                (c) 3 only                   (d) 2 and 3

Q.3 The total number of independent equations that from the Lacey's regime theory is

(a) 2               (b) 3                (c) 4             (d) 5

Q.4 A channel designed by Lacey's theory has a velocity of 0.88 m/sec. The value of hydraulic radius for canal carries silt of medium size 0.025 cm is

(a) 1.95 m             (b) 2.2 m            (c) 1.63 m                 (d)1.50 m

Q.5 The Electrical conductivity of medium saline water (C2) at 25 degree centigrade is of the order (in micro mhos/cm)

(a) 50 to 100         (b) 100 to 250          (c) 250 to 750        (d) 750 to 2250