A _____ gear is similar to a spur gear except that its teeth are cut at an angle to the gears axis.

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Multiple Choice

A _____ gear is similar to a spur gear except that its teeth are cut at an angle to the gears axis.

Explanation:
Teeth cut at an angle to the gear’s axis define a helical gear. That angled tooth arrangement means the gear engages gradually as it turns, so multiple teeth share the load at any given time. This results in smoother, quieter operation and higher load capacity than a straight-toothed spur gear, which has teeth that run parallel to the axis and engage all at once. Bevel gears are cut on a conical surface to mesh at angles to the shafts; hypoid gears are like bevels but with offset axes. The described feature—teeth inclined to the axis—fits a helical gear.

Teeth cut at an angle to the gear’s axis define a helical gear. That angled tooth arrangement means the gear engages gradually as it turns, so multiple teeth share the load at any given time. This results in smoother, quieter operation and higher load capacity than a straight-toothed spur gear, which has teeth that run parallel to the axis and engage all at once. Bevel gears are cut on a conical surface to mesh at angles to the shafts; hypoid gears are like bevels but with offset axes. The described feature—teeth inclined to the axis—fits a helical gear.

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