Study the diagrams below and use them to answer questions (a) to (c). a) ldentify the equipment illustrated by diagrams D, E, F, and G. (b) State the farm o...

Answer Details

(a) Identification of the equipment:

• D - Gunter's chain
• E - Cross staff
• F - Prismatic compass
• G - Theodolite

(b) Farm operation for which they are used: They are all survey equipment, used for farm surveying (measuring and mapping farmland).

(c) Two specific uses of each of F and G:

F - Prismatic compass:

• Locating a baseline or particular places on the land.
• Taking the direction (bearing) of lines with reference to the magnetic meridian.

G - Theodolite:

• Measuring horizontal and vertical angles.
• Determining the elevation of, and sighting or locating, survey stations.

(d) Six general ways of maintaining equipment F and G:

1. Clean or wash and dry the equipment properly after every use.
2. Grease or oil the necessary metal parts to prevent rust.
3. Ensure the screws, bolts and nuts are properly tightened and secured after use.
4. Protect the equipment from getting wet, particularly the theodolite (G).
5. Use the equipment strictly according to the manufacturer's instructions.
6. Store the equipment in a cool, dry place after cleaning, and keep the prismatic compass (F) away from magnetic fields.