This set of Farm Machinery Multiple Choice Questions on “Tillage System”.
1. Which classification of tillage involves initial major soil working operation?
a) Secondary tillage
b) Primary tillage
c) Tertiary tillage
d) Primary & Secondary tillage
Answer: b
Explanation: Primary tillage is normally designed to reduce soil strength, cover plant materials, and rearrange aggregates. The operations performed to open up any cultivable land with a view to prepare a seed bed for growing crops is known as Primary tillage.
2. Which primary tillage operation is performed to cut, break and invert the soil partially or completely?
a) Ploughing
b) Winnowing
c) Threshing
d) Harrowing
Answer: a
Explanation: The main implement for primary tillage is plough used for ploughing operations. Ploughing is the primary tillage operation, which is performed to cut, brake and invert the soil partially or completely. Ploughing essentially means operating the upper crust of the soil, breaking the clos and making the soil suitable for sowing seeds.
3. What type of mouldboard is short but broader with a relatively abrupt curvature?
a) Sod or breaker
b) Slat
c) Stubble
d) General purpose
Answer: c
Explanation: Stubble type’s relatively abrupt curvature lifts, breaks and turns the furrow slice. Its curvature is not gradual but it is abrupt along the top edge. This causes the furrow slice to be thrown off quickly, pulverising it much better than the other types of mouldboard.
4. A flat plate which bears against and transmits lateral thrust of the plough bottom to the furrow wall is known as __________
a) Landside
b) Tail piece
c) Jointer
d) Coulter
Answer: a
Explanation: Landside helps to resist the side pressure exerted by the furrow slice on the mouldboard. It also helps in stabilizing the plough while it is in operation. Landside is fastened to the frog with the help of plough bolts. The rear bottom end of the landside is known as heel which rubs against the furrow sole.
5. Which plough accessory is used to turn over a small ribbon like furrow slice directly in front of the main plough bottom?
a) Coulter
b) Gauge wheel
c) Jointer
d) Land wheel
Answer: c
Explanation: Jointer is a small irregular piece of metal having of a shape similar to an ordinary plough bottom. It looks like a miniature plough. The small furrow slice that is cut from left and upper side of the main furrow slice and is inverted so that all trashes on the top of the soil are completely turned down and buried under the right-hand corner of the furrow.
6. Reversible ploughs which have single bottom with such an arrangement that the plough bottom is changed from right hand to left hand by rotating it approximately 180°?
a) Turn Wrest plough
b) Disc plough
c) Chisel plough
d) Rotavator
Answer: a
Explanation: Turn Wrest plough, while moving in one direction the plough throws the soil in one direction and at the return trip the direction of the plough is changed, thus the plough starts throwing the soil in the same direction as before.
7. What is the disc angle of a good plough?
a) 35°-39°
b) 42°-45°
c) 23°-27°
d) 59°-63°