GATE Agriculture engineering online test paper 4
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Question 1 of 15
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 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 isCorrect
Question 2 of 15
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 m*m*m/ha will beCorrect
Question 3 of 15
Energy required to grind a given mass of particles from a mean diameter of 12 mm to 4 mm is 12 kJ/kg. If energy consumed to grind the same mass of particles of 2 mm mean diameter to x mm mean diameter is 252 kJ/kg, the value of x using Rittinger’s Law will beCorrect
Question 4 of 15
A tray type paddy separator is used to separate paddy from a binary mixture of paddy and brown rice fed at the rate of 1600 kg/h. Mass fractions of paddy in feed, separated paddy and separated rice are 0.2, 0.7 and 0.02, respectively. The mass of 1000 paddy grains is 24.5 g. Separation effectiveness and number of paddy grains recycled per second, respectively areCorrect
Question 5 of 15
M kg of wheat at 9.8% moisture content (wet basis) is conditioned for 6 hours in 75 kg of water. A sample of 25 g conditioned wheat is crushed and dried in hot air oven at 130°C for 1 hour that yields 20.5 g of bone dried material. The value of M isCorrect
Question 6 of 15
In a food processing plant hot water at 90 Celsius is needed at the rate of 140% of the commodity capacity. Steam at atmospheric pressure is used for heating the water available at 25 Celsius. Latent heat of condensation at atmospheric pressure is 2257 kJ/kg, net calorific value of hull is 12552 kJ/kg
and specific heat capacity of water is 4.184 kJ /kg K. Steam is generated by utilizing the hulls received as by-product from the same plant at the rate of 22% of the commodity capacity.Assuming 20% heat loss, percentage of hull used with respect to the total available amount of hull
Question 7 of 15
The function f(x) represents a normal distribution whose standard deviation and mean are 1 and 5, respectively. The value of f(x) at x = 5 isCorrect
Question 8 of 15
A watershed area of 1851 hectare has maximum distance of 7.12 km from the outlet to the farthest point on the divide line. The form factor of the watershed isCorrect
Question 9 of 15
The normal annual rainfall for 5 rain guage stations A, B, C, D and E in a watershed were 112.7, 120.4, 118.3, 125.2 and 110.6 cm, respectively. In a particular year, the rain gauge installed at station C failed to record rainfall. In the same year the rain gauges at stations A, B, D and E
recorded annual rainfall of 114.9, 118.3, 122.6 and 114.5 cm, respectively. The estimated rainfall at station C in that particular year in cm wasCorrect
Question 10 of 15
Annual average soil loss from a watershed has been measured as 20 Mg per ha per year. Watershed has 8% land slope and 84 m maximum slope length. Assume all other factors same and dimensionless exponent for slope factor is 0.5. To reduce soil loss from the watershed to 10 Mg per ha per year, the
maximum slope length in m should beCorrect
Question 11 of 15
In a cropped field, the following data are observed.
Moisture content at field capacity (weight basis) = 36%
Current moisture content (weight basis) = 24%
Bulk density of soil = 1.5 Mg per meter cube
Effective root zone depth = 0.8 m
Conveyance efficiency = 80%
Application efficiency = 90%
To bring soil moisture content to field capacity, the depth of irrigation in mm will beCorrect
Question 12 of 15
The correct conditions for which the hydraulically efficient rectangular channel will deliver maximum discharge are
P – depth of water is equal to half the breadth of channel
Q – depth of water is equal to breadth of channel
R – depth of water is equal to twice the breadth of channel
S – hydraulic radius is equal to half the depth of waterCorrect
Question 13 of 15
The most suitable hydraulic structure for conveying water from higher elevation to lower elevation across the earthen bund isCorrect
Question 14 of 15
Match the following
(P) Waste valve (1) Jet pump
(Q) Plunger (2) Centrifugal pump
(R) Foot valve (3) Reciprocating pump
(S) Nozzle and venturi (4) Hydraulic ramCorrect
Question 15 of 15
The ASAE-SAE standard for tractor 3-point hitches has been categorized as Category I to IV on the basis ofCorrect