i) Lewis equation for design of involute gear tooth predicts the static load capacity of a cantilever beam of uniform strength. ii) For a pair of gears in mesh, pressure angle and module must be same to satisfy the condition of interchangeability and correct gearing.

Both Statement I) and Statement II) are individually true but Statement II) is not the correct explanation of Statement I)

Pressure angle of involute gears does not exceed 25°, since

this will lead to unwanted radial force

UPSC IES · General Awareness

UPSC IES Gear Design Questions with Answers and Solutions

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UPSC IES Gear Design practice

Topic-wise practice4 questions 5 min

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Consider the following statements regarding gear tooth designing for gear drive: 1. Tooth profiles not designed as per ‘law of gearing’ will cause vibration and impact problems even at low speed. 2. As the gears go through their mesh, the pitch point must remain stationary on the line of centres. 3. In a correctly designed tooth profile, the line of action of successive instantaneous points of contact will pass through the stationary pitch point. Which of the above statements are correct?

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UPSC IES Gear Design practice FAQ

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UPSC IES Gear Design practice

What visitors can use on this page

UPSC IES Gear Design practice FAQ

Prepare together, not alone

UPSC IES Gear Design practice

What visitors can use on this page

UPSC IES Gear Design practice FAQ