Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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Which of the following is NOT a type of gear?

  1. Straight Gear

  2. Spur Gear

  3. Needle Gear

  4. Bevel Gear

The correct answer is: Needle Gear

Needle gear is not recognized as a standard type of gear in mechanical engineering. Gears are typically classified into various recognized types based on their design and function. Straight gears, spur gears, and bevel gears are all widely used in mechanical applications, each serving specific purposes; for example, spur gears are designed with teeth that are parallel to the axis of rotation, and bevel gears are used to transmit power between shafts that are at an angle to each other. The term "needle gear" does not align with established gear nomenclature, confirming that it is not a conventional type of gear.