ASVAB (Armed Services Vocational Aptitude Battery)Auto and Shop Information (AS)Medium
A machinist is preparing to cut a piece of mild steel using a hacksaw. To maximize cutting efficiency and blade life, which statement accurately describes the proper technique for using a hacksaw?
- AApply heavy, constant pressure on both push and pull strokes.
- BApply light, even pressure on the push stroke, and lift slightly on the pull stroke.
- CUse long, slow strokes with no pressure on either stroke.
- DApply pressure only on the pull stroke to prevent teeth from dulling.
Show answer & explanationAnswer & explanation
Correct answer: B. Apply light, even pressure on the push stroke, and lift slightly on the pull stroke.
Hacksaw blades are designed to cut on the push stroke. Applying light, even pressure during the push stroke ensures efficient cutting, while lifting slightly or relieving pressure on the pull stroke prevents dulling the teeth and clears chips.
Why the other options are wrong
- A. Heavy, constant pressure will prematurely dull the blade, cause excessive friction, and potentially break the blade.
- C. Using no pressure will not cut the material effectively, and long, slow strokes are generally good but must be accompanied by proper pressure application.
- D. Hacksaw blades are designed to cut on the push stroke, not the pull stroke.
Hacksaw Technique
The method of using a hacksaw to efficiently cut metal, focusing on proper pressure application and stroke direction.
- Cuts on the push stroke.
- Relieve pressure on the pull stroke.
- Use long, steady strokes for efficiency.
Memory trick: Push to cut, pull to clear, make your metal fears disappear.