Mechanical Engineering Test Preparations On Machine Design Part 2

Test Preparation on Mechanical Engineering Test Preparations On Machine Design Part 2

1.

The rolling contact bearings as compared to sliding contact bearings have

1small overall dimensions
2accuracy of shaft alignment
3low starting and low running friction except at very high speeds
4all of the above

2.

The maximum normal stress theory is used for

1brittle materials
2ductile materials
3plastic materials
4non-ferrous materials

3.

The difference between the tooth space and the tooth thickness as measured on the pitch circle is called

1working depth
2clearance
3face width
4backlash

4.

A sliding bearing that operates without any lubricant present is called

1zero film bearing
2boundary lubricated bearing
3hydrodynamic lubricated bearing
4hydrostatic lubricated bearing

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