204. The contact ratio or engagement factor in case of gears should be
A.Less than 1
B.1
C.1.3 to 1.5
D.1.8 to 2.0

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205. Which of the following is not the gear for non-parallel, non-intersecting shafts
A.Cross
B.Helical
C.Bevel
D.Worm

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206. The product of circular pitch and diameteral pitch is equal to
A.Module
B.Unity
C.(d)
D.(b) complex profile and less flexible

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207. Bevel gears have their teeth
A.Straight-over the wheel rim
B.Inclined to wheel rim
C.Curved over the wheel rim
D.Cut on the surfaces of the frusta of cones

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208. Helical gears have their teeth
A.Straight over the wheel rim
B.Inclined to wheel rim
C.Curved over the wheel rim
D.Cut on the surfaces of the frusta of cones

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209. Which is false statement about involute gears
A.Pressure angle varies from zero at pitch to maximum at commencement and end of engagement
B.Slight variation in centre distance can be tolerated
C.Simple tools required for manufacture
D.Smooth running

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210. The centre distance between involute gears is a function of the base circle radii of the meshing gears and
A.The pressure angle
B.No. of teeth
C.Pitch circle diameter
D.Speed

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