 # Theory of Machine | Theory of Machine Objective Type Questions and answers

26. Which of the following does not change with the conditions of the mating gears.......

A.pitch circle diameter

B.base circle

C.pressure angle

D.all of the above

E.none of the above

B.base circle

27. The circle passing through the bottom of the teeth of gear is known as.......

A.inner circle

B.prime circle

C.base circle

E.dedendum circle

E.dedendum circle

28. Law of gearing is satisfied if.......

A.two surfaces slide smoothly

B.common normal at the point of contact passes through pitch point on the line joining the centres of rotation

C.number of teeth=PCD/module

E.none of the above

B.common normal at the point of contact passes through pitch point on the line joining the centres of rotation

29. The path of contact in involute gears is.......

A.a straight line

B.involute path

C.curved line

D.circle

E.cycloidal

A.a straight line

30. According to the law of gearing.......

A.teeth should be of involute type

B.clearence between mating teeth should be provided

C.dedendum should be equal to 1.157 m

D.teeth should be of cycloidal type

E.none of the above

E.none of the above