AIT Tools & Equipment 2 — Questions and Answers
Question 1: What safety feature on many circular saws stops the blade rapidly when the trigger is released?
- Blade guard
- Electric brake (Correct answer)
- Riving knife
- Anti-kickback pawl
Correct answer: Electric brake
An electric brake briefly reverses current to the motor when the trigger is released, stopping blade rotation quickly to reduce the risk of contact injuries.
Question 2: Before operating a keyed chuck drill, which step is absolutely required?
- Remove the chuck key from the chuck (Correct answer)
- Set the speed selector to maximum
- Disable the clutch mechanism
- Remove the battery to verify charge
Correct answer: Remove the chuck key from the chuck
The chuck key must always be removed before starting the drill; a key left in the rotating chuck becomes a dangerous projectile that can cause serious injury.
Question 3: What is the function of the spiral flutes on a drill bit?
- To provide grip in the chuck jaws
- To channel chips and debris out of the hole (Correct answer)
- To indicate drilling depth
- To center the bit on the workpiece
Correct answer: To channel chips and debris out of the hole
The spiral flutes create a helical channel that carries chips and debris out of the hole as the bit advances, preventing clogging, overheating, and bit breakage.
Question 4: Under what circumstance is it acceptable to remove the guard from an angle grinder?
- When working in tight or confined spaces
- When switching to a cutting disc
- Never — the guard must always remain installed (Correct answer)
- When the guard obstructs the operator's view
Correct answer: Never — the guard must always remain installed
Angle grinder guards must never be removed because they protect operators from sparks, debris, and the hazard of disc fragmentation at high RPM.
Question 5: Which power saw is best suited for making curved or irregular cuts in wood or thin materials?
- Circular saw
- Compound miter saw
- Jigsaw (Correct answer)
- Table saw
Correct answer: Jigsaw
A jigsaw uses a short, narrow reciprocating blade that can pivot and navigate curves, making it the correct tool for curved or irregular cuts.
Question 6: What role does the pilot bearing on a router bit serve?
- It balances the bit to reduce vibration
- It rides along the workpiece edge to guide and control the cut depth (Correct answer)
- It connects the bit shank to the collet
- It acts as a heat sink to prevent overheating
Correct answer: It rides along the workpiece edge to guide and control the cut depth
The pilot bearing rolls along the edge of the workpiece, guiding the router bit and ensuring a consistent profile cut without requiring a separate fence or guide.
Question 7: When operating a belt sander on wood, in which direction should you move the tool to minimize surface scratches?
- Against the grain for faster material removal
- With the grain to reduce visible scratch marks (Correct answer)
- In a circular motion to average out scratches
- Perpendicular to the grain for even coverage
Correct answer: With the grain to reduce visible scratch marks
Sanding with the wood grain keeps any scratch marks parallel to the grain lines, making them far less visible in the finished surface.
AIT Tools & Equipment 2
What safety feature on many circular saws stops the blade rapidly when the trigger is released?