What material is the shroud surrounding the blades made of?

What material is the shroud surrounding the blades made of?

• A. Aluminum
• B. Magnesium
• C. Carbon Fiber
• D. Titanium

Answer: (B)

The key idea here is weight management for a shroud that surrounds spinning blades. In rotating equipment, lighter components reduce centrifugal loads and the energy needed to accelerate and decelerate the rotor, which can improve efficiency and dynamic response. Magnesium is selected because it is the lightest metal among the options, providing the greatest potential weight reduction for the shroud. That weight saving directly lowers the inertia of the moving parts, helping the system respond more quickly and use less power to drive the rotor. Other materials bring trade-offs. Aluminum is heavier than magnesium, though still lightweight. Titanium offers high strength and heat resistance but at higher cost and with greater density than magnesium. Carbon fiber can be very light and strong, but its performance depends on orientation and it can be more expensive and complex to integrate in certain shroud environments. Because the design prioritizes minimal weight while still meeting structural requirements, magnesium best fits that balance.

The key idea here is weight management for a shroud that surrounds spinning blades. In rotating equipment, lighter components reduce centrifugal loads and the energy needed to accelerate and decelerate the rotor, which can improve efficiency and dynamic response. Magnesium is selected because it is the lightest metal among the options, providing the greatest potential weight reduction for the shroud. That weight saving directly lowers the inertia of the moving parts, helping the system respond more quickly and use less power to drive the rotor.

Other materials bring trade-offs. Aluminum is heavier than magnesium, though still lightweight. Titanium offers high strength and heat resistance but at higher cost and with greater density than magnesium. Carbon fiber can be very light and strong, but its performance depends on orientation and it can be more expensive and complex to integrate in certain shroud environments. Because the design prioritizes minimal weight while still meeting structural requirements, magnesium best fits that balance.