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Analysis and Design of Machine Elements
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Problems

Review Questions

1 Why are rolling contact bearings used more widely than sliding bearings in mechan-
ical equipment?

2 What factors are usually considered while selecting a bearing type?

3 What factors are usually considered while designing assembly details of a bearing?

4 Why is lubrication important for the proper operation of rolling contact bearings?

5 When should two bearings be used to support a shaft with each bearing retained in
one direction?
Objective Questions

1 The sealing of contact bearings does not prevent ____________.
(a) outside dust and waste getting in
(b) outside water vapour getting in
(c) oil inside flowing out
(d) operational noise

2 ____________ must be used in pairs.
(a) Deep-groove ball bearings
(b) Cylindrical roller bearings