Assistant Engineer (Agri)

Q1. A rear wheel drive tractor with a total weight of 45 kN has wheel base 2165 mm and centre of gravity is 730 mm ahead of rear axle. The tractor is towed on a level ground having cone index 1500 kPa. The tractor is pulling a level drawbar pull of 25 kN on a concrete surface at a forward speed of 3.5 km/h and the drawbar height is 425 mm, the axle power is 35 kW.
(10) Determine Weight transfer on rear axle

(a) Q
1. A rear wheel drive tractor with a total weight of 45 kN has wheel base 2165 mm and centre of gravity is 730 mm ahead of rear axle. The tractor is towed on a level ground having cone index 1500 kPa. The tractor is pulling a level drawbar pull of 25 kN on a concrete surface at a forward speed of 3.5 km/h and the drawbar height is 425 mm, the axle power is 35 kW.
(10) Determine Weight transfer on rear axle

(b) Coefficient of traction

(c) Drawbar power

(d) Tractive efficiency

• (b) Coefficient of traction
• (c) Drawbar power
• (d) Tractive efficiency

Q2. Q 2. A 4 m bulldozer is costing Rs.30 lacs is purchased by a contractor for land development works. If the owner wants to operate the dozer on custom hiring basis and wants to earn Rs. 200 per hour of working. Calculate the charge of the dozer- hiring (Rs./hour) with following data: Salvage value: 10 % of initial cost, working life: 10 years, working hours/year: 1000, interest rate: 14 % per annum, taxes, insurance and housing: 3% of initial cost/year, Diesel consumption: 12 lit/hour(@Rs. 90/lit), Oil consumption: 0.3 lit/hour(@ Rs. 300/lit), Annual Repair and maintenance charge: 20% of initial cost, Driver and helper charge Rs.1500/- per day. Assume required data if necessary.

Q3. Q 3. How sprayers are classified on different basis? Explain components, working and uses of drone sprayers used in Indian agricultural.

Q4. Q 4. What are different types of hand tools and hoes used to carry out inter culturing operation? Explain each with appropriate figure, its construction details and its utility with specific condition and crop.

Q5. Q 5. Draw a neat figure and explain its working. What are the components of CI engine fuel supply system?

Q6. Q 6. What are the functions of differential system used in a tractor? Explain working of differential. In what circumstances differential lock becomes helpful to tractor operator? Enlist different types of rain gauges. Explain any ONE with neat sketch.

Q7. Q 7. Enlist different types of rain gauges. Explain any ONE with neat sketch.

Q8. Q 8. A drop-inlet spillway is designed for a gully having a catchment area of 50 ha. The rainfall intensity of duration equal to the time of concentration for a 25-year return period storm is 120 mm h-1. The upstream water surface elevation is 28.6 m, and the elevation of the centre of the conduit at its outlet is 25.1 m. The conduit is 26 m long, with K = 0.5 and K = 0.015. Determine the conduit diameter to discharge 50% of peak flow. Take runoff coefficient, c = 0.30.

Q9. Q 9. The following runoff data were collected from a 550 km² area of the watershed at 3 h interval for 18 h. Calculate the depth of direct runoff and ordinates of unit hydrograph, assuming that the base flow is limited up to 30 m³/s. Time, 0 9 3 12 15 6. 18 h Runoff, 30 180 370 150 85 450 30 m³/s

Q10. Q 10. The following data were obtained in determining the soil moisture content at successive depths in the root zone prior to applying irrigation water. Depth of sampling, Wt. moist soil sample, Oven dry wt. of soil sample, cm gm gm 0 - 25 135.60 127.82 25 - 50 128.95 137.28 50 - 75 123.95 116.32 75 - 100 103.64 111.92 The bulk density of the soil in the root zone was 1.65 gm/cc. the available moisture holding capacity of the soil was 18.0 cm/m depth. Determine: i) The moisture content at different depths in the root zone. ii) Moisture content in the root zone at the time of irrigation. iii) Net depth of water to be applied to bring the moisture content to field capacity. iv) Gross irrigation requirement at an estimated field irrigation efficiency of 70 %.