When is a driver of a motor vehicle required to dip the vehicle’s lights?
- Correct answer: When driving behind another vehicle and his high beam hits the rear part of the vehicle in front.
- When the vehicle’s “fog light” is also turned-on.
- Only while driving inside a tunnel.
- When driving behind another vehicle and his “fog light” and “high beam” are turned-on at the same time.
Why this is the answer
The correct answer in the official bank: When driving behind another vehicle and his high beam hits the rear part of the vehicle in front.
You must switch from high beam to low beam when your high beam reaches the rear of the vehicle ahead. The light reflects in that driver's mirrors and dazzles them, which is dangerous. Having a fog light on does not by itself require dipping, and the duty is not limited to tunnels. The same principle applies to oncoming traffic: never dazzle other drivers.