Deck 21: Bearings

Question 1

Bearings are classified as plain bearings and _________________________ bearings.

Answer 1

antifriction

Question 2

Ball, roller, and needle bearings are classified as ____ bearings.

A) combined load
B) antifriction
C) contact
D) thrust

Answer 2

D

Question 3

When using a journal or sleeve bearing, the shaft should be softer than the bearing material in order to minimize bearing wear.

Answer 3

False

Question 4

Journal bearings are usually made of cast or porous ____________________.

Question 5

UNC stands for ____.

A) Unified National Coarse
B) Unified National Code
C) Union National Coarse
D) Unified National Close

Question 6

The abbreviation for REQUIRED is ____.

A) REQ'D
B) REQ'D.
C) REQD.
D) REQD

Question 7

HEX. Is the abbreviation for hexagon.

Question 8

If there is no depth indicated, the symbol calls for a spotface.

Question 9

All rotating machinery parts are supported by bushings.

Question 10

A metric thread with a diameter of ten millimeters would be designated on a drawing as ____________________.

Question 11

In the thread note .562-12 UNC-2B, the B indicates an internal thread.

Question 12

The most common types of plain bearings are journal (sleeve) bearings and ____________________ bearings.