Question

class d (operator) test question #20 / 30
highway pavement is particularly treacherous and will be slickest:
select a letter to choose your answer.
a if it has been raining from one to two hours
b if it has just begun to rain
c if it has been raining several hours

Explanation:

When it first starts to rain, oil and dirt on the pavement that have built - up mix with the rainwater, creating a slippery layer. As the rain continues for longer periods, these contaminants are washed away.

Answer:

B. If it has just begun to rain