Agricultural/Bioengineering Farm Machinery 5

Question 1

Which safety device is required on all tractor PTOs in the US to prevent entanglement injuries?

Accepted Answer

Shield guard over the PTO shaft

Answer

OSHA and ASABE standards require a non-rotating plastic or metal shield covering the PTO stub shaft and the implement driveline when in use.

Question 2

Precision agriculture variable-rate technology (VRT) adjusts which of the following based on field zones?

Accepted Answer

Input application rates such as seed, fertilizer, or pesticide

Answer

VRT systems use prescription maps to automatically change application rates across different management zones within a field.

Question 3

What causes 'plugging' in a forage harvester chopper head?

Accepted Answer

Wet or tough crop material overwhelming the feed rolls

Answer

Wet, stemmy, or lodged crops can exceed the feed rate capacity of the rolls, causing material to pack and stall the cutting mechanism.

Question 4

On a self-propelled sprayer, what is the benefit of an 'auto-boom height' system?

Accepted Answer

It maintains optimal boom distance from the crop canopy regardless of terrain

Answer

Auto-boom height sensors continuously adjust boom position to keep consistent canopy clearance, improving coverage uniformity and reducing drift.

Question 5

What is the function of a 'slip clutch' on a PTO-driven implement?

Accepted Answer

It protects the driveline by slipping when torque exceeds a set limit

Answer

A slip clutch allows the driveline to slip momentarily when encountering a sudden overload (e.g., hitting a rock), preventing shear bolt failure or gearbox damage.

Agricultural/Bioengineering Practice Test

Agricultural/Bioengineering Practice Test

Agricultural/Bioengineering Farm Machinery 5