Bomb detection and disposal equipment includes specialized tools and vehicles designed to locate, identify, contain, or neutralize explosive devices. Non-Linear Junction Detectors (NLJD) are used to find electronic components in devices like IEDs. Threat Containment Vehicles (TCV) are used to ing time delay (activated after a set period), physical action (activated by pressure, pull, etc.), and environment (activated by changes in light, temperature, etc.). Statement 3 is correct: Chemical pencils are a type of improvised time-delay fuse where a chemical reaction eats through a restraining material over time, releasing a firing pin or activating mechanism.