MACHINE DESIGN QUIZ

Pitch diameter

Pitch

Major diameter

Minor diameter

Greater than

None of these

Less than

Equal to

Is less flexible

Has a much smaller load carrying capacity

Provides much greater time for remedial action before failure

Does not provide much warning before failure

0.5

0.6

0.25

0.2

A pair of tongs

Lever of a loaded safety valve

Handle of a hand pump

Hand wheel of a punching press

Slush casting

Permanent mould casting

Sand mould casting

Centrifugal casting

Equating shearing resistance to the crushing resistance of the rivets

Equating tearing resistance of the plate to the crushing resistance of the rivets

None of these

Equating tearing resistance of the plate to the shearing resistance of the rivets

2 d

2.5 d

1 d

1.5 d

Surface of the top of the tooth

Surface of the tooth above the pitch surface

Width of the tooth measured along the pitch circle

Surface of the tooth below the pitch surface

Has no influence on fatigue strength

Decreases the fatigue strength

Increases the fatigue strength

Alone has no influence on fatigue strength