Multiple choice general knowledge science & technology

Which of the following gears have their axes cross at 90 degree;

  1. Spur Gear

  2. Worm Gear and Worm Wheel

  3. Helical Gear

  4. Double Helical gear
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Worm gear and worm wheel systems have their shaft axes positioned at 90 degrees to each other, making them ideal for applications requiring right-angle power transmission with high gear reduction. Spur and helical gears have parallel axes, while double helical gears also maintain parallel shaft alignment.

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