useless trivia: What Word Means: The Movable Part Of A Helmet That Covers The Eyes?

Questions

A normal raindrop falls at about ---------- miles per hour.?

A penny whistle has ---------- finger holes.?

A rainbow can only occur when the sun is ---------- degrees or less above the horizon.?

A ---------- chip a quarter-inch square has the capacity of the original 1949 ENIAC computer, which occupied a city block.?

A standard ---------- is 7'8 x 3'2 x 6.?