What material lines the inside of a Nonel shock tube?

• A. Metal fragments
• B. Sand
• C. Finely powdered explosives
• D. Water

Answer: (C)

The correct choice is based on the function and construction of the Nonel shock tube. Inside a Nonel device, finely powdered explosives serve as the primary material that enables the shock tube to function effectively. This powdered material is critical because it reacts to the initiation signal, allowing for the controlled detonation of explosives at a distance.

The use of finely powdered explosives provides a reliable means of transmitting the signal necessary for detonation. This characteristic highlights the importance of the internal material in enhancing safety and accuracy in explosive applications.

In contrast, other materials such as metal fragments, sand, and water do not contribute to the intended purpose of the shock tube. Metal fragments could pose significant risks, as they would not facilitate a reliable initiation of explosives, while sand would not provide any explosive characteristics necessary for the shock tube's operation. Water can hinder the functionality of explosives, rendering it unsuitable as a lining material within the shock tube.