In ladder placement considerations, what hazard may be visible during the day but not at night?

In ladder placement considerations, what hazard may be visible during the day but not at night?

• A. Overhead power lines
• B. Exterior hazards
• C. Water supply lines
• D. Building setback

Answer: (A)

Ladder placement hinges on spotting hazards in the work area, and lighting can change what you see. Overhead power lines are a hazard that many people notice in daylight because they’re clearly visible, but after dark they can become hard to pick up without good lighting. If a ladder is placed too close to live lines, it can contact or arc to the conductor, leading to severe electrical injury. That’s why you must maintain a safe clearance from any lines, use nonconductive ladder material when near them, and ensure lines are de-energized or properly guarded if possible, with a spotter to verify distances and provide lighting. Exterior hazards, water supply lines, and building setbacks are concerns, but they don’t depend on whether it’s day or night in the same way. They’re either present regardless of lighting or are fixed site conditions, not hazards that reliably disappear after dark.

Ladder placement hinges on spotting hazards in the work area, and lighting can change what you see. Overhead power lines are a hazard that many people notice in daylight because they’re clearly visible, but after dark they can become hard to pick up without good lighting. If a ladder is placed too close to live lines, it can contact or arc to the conductor, leading to severe electrical injury. That’s why you must maintain a safe clearance from any lines, use nonconductive ladder material when near them, and ensure lines are de-energized or properly guarded if possible, with a spotter to verify distances and provide lighting.

Exterior hazards, water supply lines, and building setbacks are concerns, but they don’t depend on whether it’s day or night in the same way. They’re either present regardless of lighting or are fixed site conditions, not hazards that reliably disappear after dark.