Examkin

Soru

Zorluk: OrtaWinter Driving

Before operating a commercial motor vehicle in winter conditions with potential snow and ice accumulation, a driver must ensure the vehicle is properly equipped and configured for safe operation. Which of the following practices is correct according to commercial vehicle safety standards?

  1. A
    Accept a minimum steer tire tread depth of 2/32 inch provided that drive axle tires are equipped with full winter tread.
  2. B
    Set the auxiliary engine retarder to maximum resistance on slick pavement to minimize service brake wear.
  3. Confirm that front steer tires have a minimum tread depth of 4/32 inch and disable auxiliary engine retarders on slippery roads.Cevap
  4. D
    Rely on the standard dry-pavement following interval without extension, compensating solely through earlier steering inputs.

Cevap

Confirming that front steer tires have a minimum tread depth of 4/32 inch and disabling auxiliary engine retarders on slippery roads.
According to commercial motor vehicle safety regulations, front steer tires must have a minimum tread depth of 4/32 inch in every major groove to provide steering traction. Additionally, engine retarders must be disabled whenever roads are wet, icy, or snow-covered, because their braking action on the drive wheels can cause a loss of traction and lead to a dangerous skid or jackknife.

Adım Adım Çözüm

1
Identify the minimum tread depth requirement for front steering axle tires during winter pre-trip inspections.
Steer tires require at least 4/32 inch of tread depth in every major groove to provide adequate traction and steering control.
Insufficient tread depth on steer tires drastically increases the risk of loss of directional control on wet, snowy, or icy roadways.
2
Evaluate the proper operational setting for engine retarders on slippery or snow-covered surfaces.
The auxiliary engine retarder must be switched off.
Retarders apply braking resistance exclusively to the drive wheels; on slippery surfaces, this sudden drag can cause drive wheels to skid and result in a jackknife.

Anahtar Kavram

Winter pre-trip tire tread specifications and slippery road retarder management
Tahmini Süre:1m 0s
Bu soruyu puanla

Konular

Winter Driving

Bu konudan daha fazla soru