Agricultural/Bioengineering Farm Machinery 3

Question 1

What is the purpose of a no-till drill compared to a conventional grain drill?

Accepted Answer

It cuts through crop residue to place seed without prior tillage

Answer

No-till drills use coulters and opener blades to cut through surface residue and place seed directly into undisturbed soil.

Question 2

Which factor most directly determines the 'effective field capacity' of a harvesting machine?

Accepted Answer

Field efficiency and operating width

Answer

Effective field capacity (ac/hr) equals theoretical capacity multiplied by field efficiency, accounting for turns, delays, and overlaps.

Question 3

A moldboard plow is best suited for which soil condition?

Accepted Answer

Heavy crop residue fields requiring soil inversion

Answer

The moldboard plow inverts the soil profile, burying surface residue and weeds, making it ideal for fields with heavy crop debris.

Question 4

What is the role of a crop divider on a corn header?

Accepted Answer

It guides standing stalks into the row units

Answer

Crop dividers are pointed shields between row units that separate and guide corn stalks into the stalk rolls and gathering chains.

Question 5

Which hydraulic system type on modern tractors provides flow only when an implement demands it, saving fuel?

Accepted Answer

Closed-center load-sensing system

Answer

Closed-center load-sensing (LS) hydraulics vary pump output to match actual demand, reducing energy waste at low or zero flow conditions.

Agricultural/Bioengineering Practice Test