In a spur gear, if pitch diameter =168 mm; module = 3.25 mm, the number of teeth will be :

56) In a spur gear, if outside diameter = 300 mm; module = 5 mm, the number of teeth will be :

57) In a spur gear, if pitch diameter = 40 mm; outside diameter = 48 mm, module = 4 mm, the number of teeth will be :

58) In a spur gear, if module = 4 mm, the tooth height will be :

59) Which one of the following is an advantage of down cut milling when compared with up cut milling ?