Question

Registration and alignment are the cutting knife adjustments related to

• A. Reaper
• B. Mower
• C. Combine harvester
• D. Reaper binder

Hint:

Think of the classic sickle bar mower and its knife to guard positioning checks.

Answer 1

The Correct Option is B

Step 1: A reciprocating (sickle bar) cutting mechanism has knife sections that must line up correctly with the guards for a clean cut. Two of the standard adjustments taught for this mechanism are registration and alignment.

Step 2: Registration means setting the knife so that at the end of each stroke, the center of a knife section sits exactly at the center of a guard, giving the cleanest possible cut on both sides. Alignment means making sure the guards themselves sit in a straight line along the cutter bar, so the knife slides smoothly without binding.

Step 3: These two adjustments, registration and alignment, are specifically taught as the standard cutter bar checks for a mower, since a mower's sickle bar depends heavily on precise knife to guard positioning for a clean, low cut of forage or hay crop.

Step 4: While reapers, combine harvesters, and reaper binders also use cutting knives, registration and alignment are the textbook adjustment terms specifically associated with the mower's cutter bar. So option 2 is correct.