A driver is going down the road, applies his brakes and starts to skid, releases the brakes while still moving, then re-applies the brakes and skids again. What kind of skid is this?

The correct answer is that this situation describes a "skip skid." When a driver applies the brakes and begins to skid, releasing the brakes can briefly regain some traction. However, by reapplying the brakes while still in a skid, the tires can lock up again, which can create a condition where the vehicle alternates between gaining traction and losing it, thus creating a "skip skid."

In this scenario, the key factor is the driver’s action of reapplying the brakes while in a skid, which disrupts the vehicle's ability to maintain controlled traction and leads to a cyclical pattern of skidding. This behavior is characteristic of a skip skid rather than other types which focus on different braking or driving dynamics.

Other terms such as ABS skid typically refer to situations where the Anti-lock Braking System helps prevent wheel locking, which is not applicable here since the vehicle is skidding due to a locked wheel condition. Similarly, gap skid and power skid do not accurately describe the nature of this specific scenario. Understanding these distinctions can aid in correctly identifying the type of skid experienced in varying driving conditions.