MACHINE DESIGN QUIZ

The value of stress concentration factor depends upon

None of these

Material and geometry of the part

Geometry of the part

Material of the part

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When the fulcrum is in between the load and effort, the lever is said to be of

First type

Second type

Any one of these

Third type

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Guest's theory of failure is applicable for following type of materials

Brittle

Ductile

Elastic

Plastic

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The maximum normal stress theory is used for

Brittle materials

Ductile materials

Non-ferrous materials

Plastic materials

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An Involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the

Tip of both gear and pinion

Tip of the gear and flank of pinion

Flanks of both gear and pinion

Tip of the pinion and flank of gear

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A bolt of M 24 × 2 means that

The nominal diameter of bolt is 24 mm and pitch is 2 mm

The pitch of the thread is 24 mm and depth is 2 mm

Cross-sectional area of the threads is 24 mm²

The effective diameter of bolt is 24 mm and there are 2 threads per cm

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The bearings of heavy series have capacity __________ over the medium series.

20 to 30%

40 to 50%

30 to 40%

10 to 20%

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A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where σ = Stress for a plate with no hole i.e. nominal stress)

σ [1 + (b/2a)]

σ [1 + (b/3a)]

σ [1 + (3a/b)]

σ [1 + (2a/b)]

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A key made from a cylindrical disc having segmental cross-section, is known as

Feather key

Gib head key

Woodruff key

Flat saddle key

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The contact ratio is the ratio of

Length of arc of contact to the circular pitch

Length of path of contact to the circular pitch

Length of arc of approach to the circular pitch

Length of arc of recess to the circular pitch

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