Irrigation Engineering MCQ online Mock Test Papers for GATE, IES - Set 05 - ObjectiveBooks

# Practice Test: Question Set - 05

1. The length of a meander is the distance along the river between the tangent point of one curve to the tangent point of
(A) Reverse curve
(B) Next curve of the same order
(C) Reverse curve plus the width of the river
(D) None of these

2. The top of the capillary zone
(A) Lies below the water table at every point
(B) Lies above the water table at every point
(C) Coincides the water table at every point
(D) None of these

3. The depth of rice root zone, is
(A) 50 cm
(B) 60 cm
(C) 80 cm
(D) 90 cm

4. If the irrigation efficiency is 80%, conveyance losses are 20% and the actual depth of watering is 16 cm, the depth of water required at the canal outlet, is
(A) 10 cm
(B) 15 cm
(C) 20 cm
(D) 25 cm

5. In a barrage, the crest level is kept
(A) Low with large gates
(B) High with large gates
(C) High with no gates
(D) Low with no gates

6. An outlet which maintains a constant discharge irrespective of fluctuation in the water levels of the supplying channel or water course, is known as
(A) Non-modular outlet
(B) Semi-modular outlet
(C) Flexible modular outlet
(D) Right modular outlet

7. In case of a trapezoidal notch fall
(A) Top length of the piers should not be less than their thickness
(B) Splay upstream from the notch section is 45°
(C) Splay downstream from the notch section is 22½°
(D) All the above

8. Finally formed berms in canals are provided for
(A) Protection of banks erosion by the waves
(B) Control of seepage losses
(C) Strengthening of banks
(D) All the above

9. Process of meandering is due to
(B) Discharge and hydraulic properties of streams
(C) Relative erodibility of the bed and banks
(D) All the above

10. The ratio of the rate of change of discharge of an outlet to the rate of change in level of water surface in a distributary at its normal depth, is known as
(A) Efficiency
(B) Sensitivity
(C) Flexibility
(D) Modular limit

11. The ratio of the head recovered to the head put in, is known as
(A) Efficiency
(B) Sensitivity
(C) Flexibility
(D) Modular limit

12. If H and d are the water depth and drop in the bed level at a Sarda fall, the width B of the trapezoidal crest, is given by
(A) B = 0.22 √(H + d)
(B) B = 0.33 √(H + d)
(C) B = 0.44 √(H + d)
(D) B = 0.55 √(H + d)

13. The scour depth D of a river during flood, may be calculated from the Lacey's equation
(A) D = 0.47 (Q/f)
(B) D = 0.47 (Q/f)1/2
(C) D = 0.47 (Q/f)1/3
(D) D = 0.47 (Q/f)2/3

14. When a canal and a drainage approach each other at the same level, the structure so provided, is
(A) An aqueduct
(B) A syphon
(C) A level crossing
(D) Inlet and outlet

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