Farm Machinery Flashcards
7 cards from real Agricultural/Bioengineering practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Farm Machinery flashcards as text
Which safety device is required on all tractor PTOs in the US to prevent entanglement injuries?
Answer: Shield guard over the PTO shaft
OSHA and ASABE standards require a non-rotating plastic or metal shield covering the PTO stub shaft and the implement driveline when in use.
Precision agriculture variable-rate technology (VRT) adjusts which of the following based on field zones?
Answer: Input application rates such as seed, fertilizer, or pesticide
VRT systems use prescription maps to automatically change application rates across different management zones within a field.
What causes 'plugging' in a forage harvester chopper head?
Answer: Wet or tough crop material overwhelming the feed rolls
Wet, stemmy, or lodged crops can exceed the feed rate capacity of the rolls, causing material to pack and stall the cutting mechanism.
On a self-propelled sprayer, what is the benefit of an 'auto-boom height' system?
Answer: It maintains optimal boom distance from the crop canopy regardless of terrain
Auto-boom height sensors continuously adjust boom position to keep consistent canopy clearance, improving coverage uniformity and reducing drift.
What is the function of a 'slip clutch' on a PTO-driven implement?
Answer: It protects the driveline by slipping when torque exceeds a set limit
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.
Which soil sampling grid size is most commonly used in precision agriculture to develop variable-rate fertilizer maps?
Answer: 2.5-acre grid
A 2.5-acre grid is the most widely used sampling density, balancing the cost of sampling with adequate resolution for variable-rate fertility management.
What does the term 'field efficiency' account for when calculating machinery capacity?
Answer: Time lost to turning, filling, unloading, and minor adjustments relative to theoretical capacity
Field efficiency is the ratio of effective field time to total time, capturing losses from end-of-row turns, refilling, breakdowns, and adjustments.