n For training purposes: The world’s largest train station in terms of number of platforms, New York City’s Grand Central Terminal, is often incorrectly called “Grand Central Station.” The latter term is the correct name of the nearby branch of the U.S. Postal Service.

Most people even casually acquainted with automobiles have heard of a car’s PCV valve, located within a gasoline engine’s crankcase. What does the “V” in PCV stand for?

A) Vehicle

B) Velocity

C) Ventilation

D) Valve

Monday’s answer: The interior pages of American passports feature background illustrations of U.S. state seals.