Agricultural Engineering Gate 2014 Questions with Answer

Ques 53 GATE 2014

The discharge of a single suction centrifugal pump operating against a total head of 12 m is 50 L s-1. If the pump is directly connected to a motor operating at 1440 rpm, the specific speed of the pump will be_______.

Ques 54 GATE 2014

A 200 m long horizontal pipe carries a discharge of 50 L s-1. The centre line of the pipe is 5 m above the datum. The diameter of the pipe tapers from 200 mm to 100 mm. Using g = 9.81 m s–2 and neglecting losses in the pipe, if the pressure at the larger end of the pipe is 100 kPa, the pressure at the other end of the pipe in kPa is __________.

Ques 55 GATE 2014

A tile drainage system having 200 mm diameter lateral of 400 m length is used to drain an area with a drainage coefficient of 40 mm. Manning’s roughness coefficient for the drain pipe is 0.01. Drain pipes are laid at 0.3% slope. The spacing of the tile drain in m is __________.

Ques 56 GATE 2014

A crop has effective root zone depth of 1200 mm and monthly (30 days) crop evapotranspiration of 260 mm. The effective rainfall during 30 days period is 20 mm. The field capacity and permissible soil moisture depletion (volume basis) are 16% and 8%, respectively. The irrigation interval in days for the crop will be

Ques 57 GATE 2014

In a citrus orchard, planting is done at a spacing of 5 m × 5 m. The daily pan evaporation of the orchard is 6 mm. The pan coefficient, wetting factor (crop canopy factor) and crop coefficient are 0.8, 0.6 and 0.6, respectively. Four drippers each of 4 L h-1 discharge are used to irrigate each plant. The time of operation of drip irrigation system in hours will be

Ques 58 GATE 2014

A 150 mm diameter well is driven fully in a confined aquifer of thickness 12 m. When pumping is done at a constant rate of 150 L min-1 for 10 h, the steady-state draw-downs are found to be 2.20 m and 0.02 m at distances of 14 m and 50 m, respectively from the centre of the well. The hydraulic conductivity of the aquifer in m day-1 is ___________.

Ques 59 GATE 2014

Match the processes given in Group-I with the derived products given in Group-II.

Ques 60 GATE 2014

A triangular 5-hour unit hydrograph (UH1) of a catchment area of 400 km2 has a peak discharge of 60 m3 s-1. Another triangular 5-hour unit hydrograph (UH2) having the same base width as UH1 has a peak flow of 90 m3 s-1. The catchment area corresponding to UH2 in km2 is

Ques 61 GATE 2014

A watershed has 1.8 km2 of cultivated area, 2.2 km2 of forest land and 1.4 km2 of grassed area. The runoff coefficient of cultivated area, forest land and grassed area are 0.25, 0.15 and 0.30, respectively. The main drainage channel has a fall of 25 m in the total length of 2.5 km. The Intensity-Duration-Frequency relationship for the watershed is expressed as, I=70 T^{0.25}/(t_c + 15)^{0.4} where, I - intensity in cm h-1, T - recurrence interval in years and t_c - time of concentration in minutes. For a recurrence interval of 20 years, the peak rate of runoff for the watershed in m3 s-1 will be __________.

Ques 62 GATE 2014

Bench terraces are to be constructed on a 15% hill slope. The batter slope is 1:1 and vertical interval is 2.5 m. The earth work in cutting is equal to filling. The quantum of earthwork in m3 ha–1 will be

Ques 63 GATE 2014

A triangular shaped grassed waterway with a longitudinal slope of 2.5% is to carry a discharge of 1.5 m3 s-1 with a permissible velocity of 1.2 m s-1. The side slope of the channel is 1.5:1 (Horizontal:Vertical). Without considering free board, the top width of the channel in m is _________.

Ques 64 GATE 2014

The process of determining the elevation of different points in a vertical plane is known as

Ques 65 GATE 2014

A 20 m chain used for surveying is found to be actually 19.7 m. If the actual distance is 1200 m, the chain distance in m will be________.