A、checking the area for items that may catch fire
B、that a fire watch be posted
C、checking for the explosive gases
D、all of the above
更多“Safe welding practice requires （）”相关的问题
A、safe for becoming rounded B、safe for hot work C、not safe for personnel D、not safe for hot work
A、A vessel shall proceed near the other vessel on her starboard side on the narrow channel since it is safe and practicable B、A vessel shall avoid proceeding near the starboard outer limit of a narrow channel as long as it is safe and practicable C、A vessel shall avoid proceeding along the channel because it is not safe and practicable D、A vessel shall proceed near the starboard outer limit of a narrow channel to the degree in which it is safe and practicable
A、to provide for safe practices in ship operation and a safe working environment B、to establish safeguards against all identified risks C、to continuously improve safety management skills of personnel, including preparing for emergencies D、all the above
A、An oxygen indicator B、A combustible gas indicator C、A combination combustible gas and oxygen indicator D、A flame safety lamp
A、squaring the corners B、rounding the corners C、plug welding the corners D、slot welding the corners
A、to provide for safe practices in ship operation and a safe working environment B、to establish safeguards against all identified risks C、to continuously improve safety management skills of personnel ashore and aboard ships，including preparing for emergencies related both to safety and environmental protection D、to avoid damage to the environment，in particular，to the marine environment，and to property
A、Securing equipment against slipping or drifting B、Operating machinery at its recommended speed C、Repairing loose handles on tools before using D、Using tools for purpose for which they are not designed
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