Radiation Safety Practice Exam

What kind of metals is thorium often alloyed with to enhance durability?

1. Lead and zinc

2. Iron and aluminum

3. Nickel and magnesium

4. Copper and titanium

The correct answer is: Nickel and magnesium

Thorium is often alloyed with nickel and magnesium to enhance its durability due to the beneficial properties these metals provide in terms of strength and resistance to corrosion. Nickel contributes to improvements in mechanical properties, while magnesium enhances the alloy's lightweight characteristics and increases resistance to oxidation. This combination allows for the creation of materials that are not only strong and durable but also capable of withstanding harsh conditions often encountered in various applications. The other choices do not typically involve thorium in alloying processes aimed at increasing durability. For instance, while lead and zinc are used in various applications, they do not offer the same synergistic effects with thorium as nickel and magnesium do. Iron and aluminum are also common alloys but are less effective in providing the specific enhancements that thorium seeks. Copper and titanium are primarily used for different types of applications, such as lightweight and high-strength materials, but do not specifically align with traditional uses in conjunction with thorium for enhanced durability.