Retarders can be turned on or off by the driver. When should they be turned off?

When the road is wet, icy, or snow-covered.. Section 2.13: Retarders can cause the drive wheels to skid when traction is poor. Turn them

Retarders can be turned on or off by the driver. When should they be turned off?

ANSWER BREAKDOWN
  • A. Incorrect. "On dry roads." is not correct. Retarders can cause the drive wheels to skid when traction is poor. Turn them off in wet/icy conditions.
  • B. Correct. Retarders can cause the drive wheels to skid when traction is poor. Turn them off in wet/icy conditions.
  • C. Incorrect. "When going downhill." is not correct. Retarders can cause the drive wheels to skid when traction is poor. Turn them off in wet/icy conditions.
  • D. Incorrect. "When carrying heavy loads." is not correct. Retarders can cause the drive wheels to skid when traction is poor. Turn them off in wet/icy conditions.