4. The life of a bearing is estimated during bearing testing in number of a. ser

Question

4. The life of a bearing is estimated during bearing testing in number of a. service hours b. cycles c, d. e. fatigue cracks greater than 0.006% of ball diameter specimens that passed with 90% reliability all of these 5. High torque requirements generally require a. Small module b. Small base pitch c. Small gear tooth size d. Spur gears e. None of these 6. The point of contact of two pitch circles of mating gears is called a. Pressure point b. Pitch point c. Line of action d. Load line e. None of these

Explanation / Answer

As these questions are not that much conceptual and are just based upon the definition, therefore I am not explanaing that much here. If you have any doubts, do comment below.

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4. the life of an individual bearing is specified by the no. of service hours until the failure criterion is observed. Hence option a is correct.

5. Small base pitch

6. it is the definition for pitch point. Hence b is the correct ooption.

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