Agricultural Tools

The rotary plough is a modern primary tillage implement used to break and loosen the soil before sowing. It provides efficient soil preparation by turning and pulverizing the soil.
- The Desi plough is a traditional implement but less efficient than rotary plough.
- Hoe and cultivator are mainly used for secondary tillage to break clods and weed control.

The maximum suction lift of a centrifugal pump is about 6.5 meters. This is the maximum vertical height the pump can draw water from below its impeller level, limited by atmospheric pressure and vapor pressure of the liquid.

Hydraulic systems in tractors are primarily used to lift and lower agricultural implements such as plows, harrows, and seeders. This makes it easier to control and operate the implements during farming activities. Hydraulics provide efficient force multiplication and smooth control.
- Option (A) stopping the engine is unrelated to hydraulics.
- Option (B) gear changing is mechanical.
- Option (C) hitching involves a physical linkage, not hydraulics.

A centrifugal pump is capable of discharging a large volume of water efficiently. According to typical specifications and the question context, it can discharge up to 100,000 liters of water in one hour. This high discharge capacity makes centrifugal pumps suitable for irrigation, water supply, and industrial uses.

Hydraulics in machines, especially agricultural machinery like tractors, are used to lift and lower implements such as ploughs, harrows, and seeders. This hydraulic system uses fluid pressure to perform lifting actions, making it easier and more efficient to handle heavy equipment.
- Stopping the engine, changing gears, and hitching to a trailer are functions managed by other mechanical or control systems.