1) Which one of the following is NOT the advantage of helical gears

2) To cut 38 teeth on a helical gear having an angle of 45 Degree which cutter number should be used ?

3) Which one of the following is the metric helical gear proportion for real module (M) ?

4) Which one of the following is metric helical gear proportion for indexing movement ?

5) It is the angle between the pitch cone generator and the root surface of the tooth space. For which bevel gear element is this the definition ?