GATE 2017-2018 :: GATE Agricultural
- A single acting reciprocating pump discharges 3.5 litres of water per second at 40 rpm. The pump has a piston diameter of 150 mm and a stroke of 300 mm. The percentage slip is
- A pair of parallel glass panes, each of 3 mm thickness traps 2 mm layer of stagnant air. Thermal conductivities of glass and air are 0.5 and 0.02 W m-1 K-1, respectively. If the film heat transfer coefficient of air is 10 W m-2 K-2, then Biot Number is
- Two small parallel plane square surfaces, each measuring 4 mm × 4 mm are placed 0.5 m apart (centre to centre) with 30° angle between the radial distance and both the surface normals. The view factor between the two surfaces is
- Tomato catsup with 10 Pa sn Paconsistency coefficient and 0.8 flow behaviour index is flowing in a pipe. Generalized coefficient of viscosity of catsup, in Pa sn is
- A packed bed of 480 kg solid particles having particle size of 0.15 mm and density of 800 kg m-3 is fluidized using air at 250C and 1 atmospheric pressure. If the cross section of the empty bed is 0.45 m2 and voidage at minimum fluidizing condition is 0.5, then the minimum height of the fluidized bed, in m is
- A tractor power take-off (PTO) driven stationary peg tooth type wheat thresher operating at a cylinder speed of 540 rpm requires a torque of 250 Nm at PTO. The minimum net engine power required, in kW is
- A border strip of 8 × 250 m is being irrigated by a border stream of 50 lps. The infiltration capacity of the soil is 25 mm h-1 (assumed to be constant throughout the period of irrigation). The average depth of the advancing sheet of water over the land is 70 mm. The time required to irrigate the border strip, in minutes, will be
- Decimal reduction times for Bacillus subtilis are 37 s and 12 s at temperatures of 1200C and 1250C, respectively. The temperature rise, in 0C, necessary to reduce the first value of decimal reduction time at 1200C by a factor of 10 is
- A tall silo having height to diameter ratio of 2 is holding 480 tons wheat of bulk density 960 kg m-3. The angle of internal friction for wheat is 250 and for wheat and wall surface is 240. Applying Airy formula, the maximum lateral pressure in kPa at the bottom of the bin section is
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using trapezoidal rule with two equal intervals is