2.1 Two or more spur gears meshed together are called a ... A. Pinion B. Gear train C. Gear ratio D. Idler gears

Here is the corrected answer for question 1.2.1:

1.2. Underline the correct answer.

• 1.2.1: Two or more spur gears meshed together are called a...
  • When two or more gears are meshed together to transmit motion and power, the entire assembly is known as a gear train. A pinion is a single gear, typically the smaller one in a pair.
  • Answer: B. Gear train