Which of the following is a high velocity explosive?

• A. Dynamite
• B. TNT
• C. PETN
• D. Cast primers

Answer: (B)

High velocity explosives are those that release energy by a detonation wave moving through the material at thousands of meters per second. Among the options, TNT is a classic high explosive with a detonation velocity around 6,900 m/s, making it a clear example of a high velocity explosive. It detonates reliably rather than burning, and it sits squarely in the high-explosive category that’s commonly referenced in practice.

Dynamite also detonates and is fast, but TNT is the more characteristic benchmark for high velocity explosions. PETN actually has an even higher detonation velocity, often used in booster charges, which makes it even faster than TNT. Cast primers are initiating devices (primary explosives) used to start a detonation, not bulk high-energy charges, so they aren’t described by the same high-velocity charge characteristics.

So TNT is the best match for a high velocity explosive among these options.