List of top Agricultural Engineering and Technology Questions on Tractor Hydraulic Three Point Linkage

Given below are two statements:
Statement (I): A closed-central valve has land width greater than the port width when the spool is in centre
Statement (II): An accumulator in hydraulic systems is used to supply energy when the demand of motors and cylinders is greater than the capacity of pump

In light of the above statements, choose the most appropriate answer from the options given below.

A pair of bullocks exerts 120 kg pull at 30$^\circ$ to the vertical. The speed of ploughing is 1.35 kmph and V-shape furrow having 25 cm width and 10 cm depth is formed. Calculate the horse power developed by the bullocks.

A seed drill has 12 furrow openers, each 20 cm apart, and the ground wheel is 1.5 m in diameter. If the seed rate is 50 kg/ha, calculate the number of seeds dropped per revolution of the ground wheel.