Massachusetts Hoisting License Practice Test

What precautions must be taken when working in trenches?

1. Always work alone

2. Proper shoring and gas testing as necessary

3. Wear heavy equipment

4. No precautions are needed

The correct answer is: Proper shoring and gas testing as necessary

When working in trenches, proper shoring and gas testing as necessary are critical precautions that ensure the safety of workers. Shoring refers to the support structures that stabilize the walls of the trench to prevent collapses, which can pose serious risks to workers inside. Trench walls can be unstable, especially when excavated to significant depths, making shoring essential for maintaining safety. Gas testing is also necessary as trenches can be susceptible to the accumulation of hazardous gases, especially in environments where there's confined space or the potential for organic material decay. Regular gas monitoring helps identify any dangerous atmospheric conditions, allowing for immediate corrective measures to be taken. In contrast, the other choices present unsafe or incorrect practices. Working alone in trenches increases the risk of danger without immediate assistance in case of an accident. Wearing heavy equipment is not practical or safe; the gear should be appropriate for the task without hindering movement or increasing the risk of accidents. Claiming that no precautions are needed is irresponsible, as it overlooks the clear dangers associated with trench work, such as cave-ins and exposure to toxic gases.