Grinders

Question 1

Hand grading machines are

Answer 1

Grinders where the work is geld and guided by the hand

Question 2

Exhaust tube

Answer 2

A collection tube that directs dust and particles

Question 3

Water pots

Answer 3

Small containers used to keep work piece cool by quenching

Question 4

Eye shield is

Answer 4

Transparent cover that protects the face and eyes

Question 5

Wheel guards

Answer 5

Cover most of grinding wheel

Question 6

Tool rest

Answer 6

Small platform mounted with ita surface at or slightly above centre of the wheel and provides resting spot for work piece

Question 7

Only grind on the _____ of the wheel

Answer 7

Surface, do not use sides

Question 8

Side wheel grinders are the same as pedestal and bench grinders, except

Answer 8

You grinders on the side of the wheel instead of the face

Question 9

2 advantages of side wheel grinders

Answer 9

Grinding face is flat

The angle of the work rest does not change as the grinding wheel gets smaller

Question 10

Belt grinders

Answer 10

Used for grinding and polishing operations

Question 11

Wire wheel

Answer 11

Used to clean a workpiece of scale and dirt and leaves a finish of uniform fine scratches

Question 12

Buffing wheels

Answer 12

Used to polish workpieces to a high Lustre

Question 13

Grinding discs

Answer 13

For cut off operations

Question 14

Sanding disc

Answer 14

Coated abrasives used for light finishing, deburring or chamfering

Question 15

Flap wheels

Answer 15

Consist of straps of coated abrasives, used for light finishing operations

Question 16

Aluminum oxide

Answer 16

Is made from bauxite ore

Grey to white

Question 17

Aluminum oxide wheels make up __% of all grinding wheel

Answer 17

75 %

Question 18

Aluminum oxide is suitable for general grinding on all steels and most high tensile ferrous metals except

Answer 18

Cast iron

Question 19

Silicon carbide is made in furnaces from what

Answer 19

Silica sand Coke and sawdust

Question 20

Silicon carbide ranges in color from green to black And is harder and tougher then

Answer 20

Aluminum oxide

Question 21

CBN stands for

Answer 21

Cubic boron nitrade

Question 22

Synthetic diamonds are produced for

Answer 22

Grinding and are Better than natural diamonds because specific requirements can be reached

Question 23

Abrasives have the following properties (4)

Answer 23

Hardness
Heat resistance
Toughness and
Friability

Question 24

Hardness is the

Answer 24

Ability of material to scratch or Pentwater another material

Question 25

Heat resistance is the

Answer 25

Ability of material to withstand the heat of grinding without becoming dull

Question 26

Toughness is the

Answer 26

Ability of material to resist impact and pressures created during grinding

Question 27

Friability is the

Answer 27

Ability of material to fracture under stress along certain Cleavage lines so that as the cutting edge’s become dull part of the grain breaks off and presents new cutting edges

Question 28

The smaller the number of grains

Answer 28

The larger the grit size

Question 29

The larger the number of grains

Answer 29

The smaller the grit size

Question 30

Bonds hold

Answer 30

The grains together

Question 31

The amount of bond and the type used determine

Answer 31

The hardness of the wheel

Question 32

3 most common types of bonds

Answer 32

Vetrified (V)
Resonoid (B)
and Rubber (R)