Question

which of the following is the most dangerous factor among crane accidents? select the best option. unstable soil faulty guardrails power lines improper maintenance

Explanation:

Crane accidents can be highly dangerous due to unstable soil as it affects the crane's stability, leading to potential tipping or collapse. Unstable soil undermines the crane's foundation, making it a critical and dangerous factor compared to the others (power lines, faulty guardrails, improper maintenance) which are more related to external or maintenance issues rather than the fundamental stability of the crane's base.

Answer:

Unstable soil