Agricultural Engineering Gate 2013 Questions with Answer

Ques 53 GATE 2013

Two parallel canals 50 m apart fully penetrate a homogeneous unconfined aquifer resting on a horizontal impermeable layer. The aquifer has a hydraulic conductivity of 3 m day^{-1} and an effective porosity of 0.25. One-dimensional steady groundwater flow occurs from the upper canal to the lower canal with the height of water levels in the canals 10 m and 8.5 m from the aquifer bottom, respectively. If a sediment layer of 4 cm thick with hydraulic conductivity of 1.2 × 10^{-2} m day^{-1} is ultimately deposited on the inflow face, the groundwater discharge per 1000 m width between the two canals in m^3 day^{-1} will be _______________

Ques 54 GATE 2013

A centrifugal pump having an overall efficiency of 75% requires 6 kW power at 1450 rpm to deliver water against a suction head of 5 m and a delivery head of 12 m. If the pump runs at 1650 rpm and frictional head losses are negligible, the total head developed by the pump in metres will be

Ques 55 GATE 2013

A 10 ha field has 1.2 m deep layer of sandy loam soil underlain by sandy soil up to a depth of 5 m. A pre-irrigation rainfall brings moisture content of the top 0.3 m layer to its field capacity. The moisture content of rest of the sandy loam layer remains at permanent wilting point. The volumetric moisture content at field capacity and permanent wilting point are 32 and 16%, respectively for the sandy loam soil. The field is irrigated with a stream size of 240 L s^{-1} for 24 hours. Considering the drainage from the sandy loam soil as deep percolation, application efficiency and deep percolation ratio in percent respectively are

Ques 56 GATE 2013

In an experimental setup, the discharge through a triangular notch is 0.0074 m³ s^-1 at an operating head of 0.1 m. The coefficient of discharge for the notch is 0.7. If the required discharge is 0.1 m³ s^-1, the corresponding head in m is

Ques 57 GATE 2013

In an experimental setup, the discharge through a triangular notch is 0.0074 m³ s^-1 at an operating head of 0.1 m. The coefficient of discharge for the notch is 0.7. If the required discharge is 0.1 m³ s^-1, the corresponding width of water surface in m is

Ques 58 GATE 2013

A piston pump is driven by a 5 m diameter horizontal axis wind turbine for supplying water from a borehole with a total pump head of 10 m. The mean velocity of air is 18 km h^{-1} and the density of air is 1.29 kg m^{-3}. The actual power coefficient of the wind turbine is 0.30 and the overall pump efficiency is 60%. Neglecting the transmission losses, the expected pump discharge in L s^{-1} will be

Ques 59 GATE 2013

The Rational method is used to estimate

Ques 60 GATE 2013

A 16 m high wind break is constructed to protect soil from wind erosion due to wind velocity of 18 m s^{-1} at 15 m height. The minimum wind velocity at 15 m height capable of moving the soil fraction is 8 m s^{-1}. The angle of deviation of prevailing wind direction from the perpendicular to the wind break is 30°. The distance of full protection from the wind break in m is

Ques 61 GATE 2013

A 100 ha watershed received rainfall at a rate of 5 cm h^{-1} for 2 hours. If the runoff generated by the storm was at the rate of 1 m^3 s^{-1} for 10 hours, the runoff coefficient for the watershed would be

Ques 62 GATE 2013

A watershed, with an area of 360 km^2, has a triangular shaped 4-h unit hydrograph with a base of 50 hours. The peak discharge of direct runoff hydrograph due to 3 cm of rainfall-excess in 4 hours from the watershed in m^3 s^{-1} is

Ques 63 GATE 2013

A soil has a void ratio of 0.75 and a specific gravity of 2.66. The value of critical hydraulic gradient at which quick sand condition will occur is

Ques 64 GATE 2013

The pressure that does not have any measurable influence on the void ratio or shearing resistance of the soil mass is

Ques 65 GATE 2013

During land leveling of agricultural land for irrigation and drainage purposes, the acceptable deviation in elevation from the design value in metre is