BUILDING CONSTRUCTION QUIZ

The ball bearings are, usually, made from

High speed steel

Low carbon steel

Medium carbon steel

High carbon steel

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Which of the following has threads at both ends?

Stud

None of these

Tap bolt

Bolt

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The pitch diameter is the __________ diameter of an external or internal screw thread.

Smallest

None of these

Largest

Effective

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If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited

Buttress

Square

Acme

BSW

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In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Would depend upon other factors

Increasing the cross-section area of bar

Remain unaffected with cross-section area

Decreasing the cross-section area of bar

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The railway carriage couplings have

Square threads

Acme threads

Buttress threads

Knuckle threads

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Ball bearing type screws are found in following application

Steering mechanism

Aeroplane engines

Crane

Screw jack

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Failure of a material is called fatigue when it fails

At the elastic limit

Below the elastic limit

Below the yield point

At the yield point

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For applications involving high stresses in one direction only the following type of thread would be best suited

Buttress thread

Square thread

Acme thread

ISO metric thread

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The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)

d/8

d/2

d/6

d/4

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