Agricultural Engineering Gate 2019 Questions with Answer

Ques 14 GATE 2019

The total width between the two extreme furrow openers in a tractor drawn 9-row wheat seed drill is 1.6 m. The average mass of wheat seeds dropped per meter of row length in each furrow opener is 2.15 g. Seed rate obtained with the seed drill in kg ha⁻¹ (rounded off to one decimal place) is.

Ques 15 GATE 2019

A level field of 1.2 ha (120 m × 100 m) is ploughed using a reversible mould board plough with a total effective cutting width of 0.64 m. The average field overlap is 80 mm between two consecutive laps. The average time taken for each turn is 30 seconds and the mean operating speed is 5.0 km h⁻¹. The maximum effective field capacity in ha h⁻¹ is

Ques 16 GATE 2019

The thresher 'A' has output capacity of 170 kg h⁻¹ while threshing paddy crop at 14% moisture content (m.c.) with a grain to straw ratio 45:55. The thresher 'B' has output capacity of 160 kg h⁻¹ while threshing paddy crop at 13% m.c. with a grain to straw ratio 40:60. Both the threshers have threshing efficiency of 97%. If a farmer has to carry out threshing of paddy crop at 12% m.c. with a grain to straw ratio 40:60 in the least time, the selected thresher and its output in kg when operated for 5 hours will be

Ques 17 GATE 2019

The application rate of an 18-nozzle hydraulic sprayer is 1120 L ha⁻¹. The nozzle spacing and forward speed are 400 mm and 3.4 km h⁻¹, respectively. The operating pressure is 2.1 MPa and the pump efficiency is 60%. If 10% of the pump output power is used for agitating the liquid, the power needed to operate the sprayer in kW (rounded off to three decimal places) is.

Ques 18 GATE 2019

The purchase price of a tractor is Rs. 5,50,000. Useful life of the tractor is 10 years and its salvage value is 10% of the purchase price. Following the sum of the years digit method, the depreciation in 3rd year in Rs. is.

Ques 19 GATE 2019

A pair of straight teeth spur gears is transmitting power at 500 rpm. The pinion has 16 standard full depth involute teeth of module 8 mm. The pitch line velocity of the pinion in m s⁻¹ (rounded off to two decimal places) is.

Ques 20 GATE 2019

A 3-cylinder 4-stroke CI engine coupled with a turbocharger has a bore and stroke length of 120 mm and 130 mm, respectively. The engine is running at 1600 rpm with a volumetric efficiency of 150%. The air to fuel ratio for complete combustion on weight basis is 14.9:1 and the density of air entering the cylinder is 1.2 kg m⁻³. The fuel consumption in kg h⁻¹ is

Ques 21 GATE 2019

A two-wheel drive tractor while operating a plough at a forward speed of 5 km h⁻¹ experiences a wheel slip of 15%. If the angular speed of the rear axle is 2.4 rad s⁻¹, the rolling radius of the traction wheel in meter will be

Ques 22 GATE 2019

The combined mass of a tractor seat and operator is 75 kg and the undamped natural frequency of the operator seat is 10 rad s⁻¹. If the seat suspension damping rate is 600 N m⁻¹ s⁻¹, the damping ratio is

Ques 23 GATE 2019

A two-wheel drive tractor is taking a turn with a radius of curvature 5.0 m. The minimum horizontal distance between the tipping axis and line of action of the CG is 800 mm. The angle between the line of action of centrifugal force and perpendicular direction to the tipping plane is 15°. If the vertical distance of the CG from the ground level is 900 mm, the limiting speed (in km h⁻¹) of the tractor to prevent overturning (rounded off to two decimal places) is.

Ques 24 GATE 2019

During operation, a two-wheel drive tractor with a total weight of 2000 kg has a weight distribution of 35% and 65% in front and rear axles, respectively. The width and diameter of the tyres fitted to the front axle are 0.18 m and 0.56 m, and those of the rear axle are 0.34 m and 1.10 m, respectively. If tyre deflection is 20%, then rolling resistance (in kN) of the tractor in a soil with average cone index 1000 kPa at a wheel slip of 15% (rounded off to two decimal places) will be.

Ques 25 GATE 2019

The clean paddy production per annum is 160 million tonnes. Average milling quality analysis indicates the husk content, total yield and degree of polish as 22%, 73.32% and 6%, respectively. For an average bran oil yield of 20%, the annual rice bran oil potential in million tonnes is

Ques 26 GATE 2019

A batch of 10000 L milk is to be sterilized and thereafter packed in 20000 packets of 500 ml each. The mean Standard Plate Count (SPC) of Bacillus subtilis in 100 samples of fresh milk was found to be 50 ml⁻¹. The milk is to be sterilized such that each 500 ml packet is completely devoid of the same organism. Minimum number of log cycle reduction for sterilization of this batch is