1. Match the symbols with the description:

1 . v 4. Type of abrasive

2. 46 5. Grade of bond

3. BE 6. Structure

4. 38A 1. Type of bond

5. K 3. Bond variation

6. 5 2. Size of abrasive grain


2. What answer best completes the statement best in three of the following:

A ringing sound produced when a suspended abrasive wheel is struck lightly with a wooden handle indicates that the wheel:

a. Is faulty

b. Is not cracked

c. Has an open structure

d. Is aluminium oxide

e. Has a fine grit size


3. The first thing to do when changing the abrasive wheel on a grinding machine is to:

a. Remove the guard

b. Move the work rest clear

c. Check the wheel specifications

d. Check the spindle direction

e. Isolate the power supply


4. To sharpen a hard cutting tool to a fine smooth edge which abrasive wheel is used.

a. ( ) Coarse grit and soft bond?

b. ( ) Fine grit and hard bond?

c. ( ) Open structure and coarse grit?

d. ( ) Soft bond and fine grit?

e. ( ) Hard bond and close structure?


5. Complete the following statement:

When an abrasive wheel is correctly mounted on the spindle of a grinding machine, the wheel should be separated from the flanges by:

Compressible washers