ASIS Professional Certified Investigator Practice Exam 2025 – Complete Study Guide

The correct choice describes a trailer as a long continuous stream of accelerant. In the context of explosives, a trailer refers to a substance that facilitates the controlled transfer of an explosive wave between two points. It is typically used to connect an initiating charge to a primary explosive, ensuring that the detonation occurs in a progressive manner.

Understanding this definition is critical because trailers can significantly influence the timing and effectiveness of an explosive device. They provide a means for the shockwave from a detonating charge to be transmitted, allowing for coordinated detonations in complex explosive applications or scenarios. This characteristic makes it essential in operations where timing and precision are crucial.

In contrast, a short delay mechanism typically pertains to devices that regulate timing through brief intervals, which is a different concept from the continuous nature of a trailer. A type of explosive device is a broader classification and does not specifically convey the function of constantly connecting or transferring explosive energy. Lastly, a device that captures flame involves a different function unrelated to the continuous transfer of an explosive reaction or energy, thus further distinguishing it from the characteristics of a trailer.