List of top Farm Machinery Questions

Fixed cost per year and variable cost per hour of a tractor were estimated based on its annual usage of 800 h. The total cost of operation was found to be Rs. 540 per hour. It was later re-estimated and found that the total cost of operation would be Rs. 510 per hour, if the annual hours of use were increased to 1000 h. Considering all the components of annual usage cost to be the same, the variable cost in Rs. per hour would be \(\underline{\hspace{1cm}}\) (answer in integer).
The speed ratio of ground wheel to metering wheel will be
Gear pump displacement = 120 cm\(^3\)/rev, speed = 1500 rpm, pressure = 18 MPa, torque efficiency = 90%. Find actual torque (Nm) (round to 2 decimals).
Cutting power = 300 W, propelling = 350 W. Conveying power = 50% of cutting power. Find total header unit power (answer in integer).
Useful soil reaction forces on a tractor–drawn mould board plough are 2.0 kN (longitudinal), 0.9 kN (transverse), and 0.6 kN (vertical). Soil–metal friction angle is \(25^\circ\). Neglecting implement weight and vertical soil reaction, estimate the draft (round off to one decimal place).