Millwright Level 1 Practice Exam

What are the characteristics of a bimetal power hacksaw blade?

1. Thin and flexible

2. High speed tooth edge with a tough alloy steel back

3. Single material construction

4. Low speed with a hardened edge

The correct answer is: High speed tooth edge with a tough alloy steel back

A bimetal power hacksaw blade is specifically designed to combine the advantageous properties of two different metals, which provides enhanced performance for cutting various materials. The correct answer highlights that these blades feature a high-speed steel tooth edge that is extremely effective for cutting, combined with a tough alloy steel backing that provides strength and durability. This combination allows the blade to endure higher levels of stress and impact while maintaining its sharpness and cutting efficiency over time. The high-speed steel gives the teeth the ability to cut through tougher materials at higher speeds, while the tougher alloy steel back supports the rigidity needed to withstand the cutting forces without breaking or bending. This design is ideal for industrial applications where consistent performance and longer lifespan are critical. Other options depict characteristics that do not align with the design and function of bimetal blades. For example, a blade that is thin and flexible lacks the structural integrity required for effective cutting under load. Single material construction would not provide the benefits of two materials, which is the hallmark of bimetal blades. Lastly, low speed with a hardened edge does not represent the operational capabilities of bimetal blades, which are optimized for higher cutting speeds.