A driver is transporting a shipment of UN1075, Liquefied Petroleum Gas (LPG), a Class 2.1 (Flammable Gas). The cargo tank is equipped with an emergency discharge control system. During an emergency, which of the following is NOT an acceptable method for the driver to activate the system?
- AActivating a system that requires a specialized tool or key not readily available to the driver.
- BActivating a remote control device from a safe distance.
- CActivating a device in the vehicle's cab.
- DActivating a manual control device located on the cargo tank.
Show answer & explanationAnswer & explanation
Correct answer: A. Activating a system that requires a specialized tool or key not readily available to the driver.
Emergency discharge control systems for flammable gases must be designed for rapid and easy activation by the driver in an emergency. This includes remote controls, manual controls on the tank, and in-cab controls. A system requiring a specialized tool or key not readily available to the driver would delay crucial emergency response, defeating the purpose of the system and is therefore not an acceptable method.
Why the other options are wrong
- B. Remote control devices are explicitly designed for safe and rapid activation from a distance during an emergency.
- C. In-cab controls provide immediate access for the driver to activate the system without leaving the vehicle.
- D. Manual controls on the cargo tank are a standard method for activating emergency discharge systems.
Emergency Discharge Control System Activation
Emergency discharge control systems on cargo tanks for certain hazardous materials (like flammable gases) must be readily activatable by the driver via remote, manual, or in-cab devices, without requiring specialized, non-readily available tools.
- Mandatory for cargo tanks carrying certain flammable gases and liquids.
- Designed for rapid activation in an emergency.
- Acceptable methods include remote, manual (on tank), and in-cab controls.
- Requires no specialized tools or keys not readily available to the driver.
Memory trick: Quick stop, easy access: emergency discharge must flow.