Abrasive Wheels Training Certificate Work Rest Adjustment and Operating Techniques 2

Question 1

What is the correct stance for an operator using a bench or pedestal grinder?

Accepted Answer

Stand to one side, clear of the wheel's plane of rotation

Answer

Stand directly in front of the wheel's plane of rotation

Answer

Crouch below the height of the wheel centre

Answer

Stand as far back from the machine as possible

Question 2

When applying a workpiece to a rotating abrasive wheel, what is the correct pressure to use?

Accepted Answer

Light, even, and controlled pressure

Answer

Heavy and constant pressure for fastest material removal

Answer

Intermittent heavy bursts of pressure

Answer

No pressure — allow the wheel's rotation to do all the work

Question 3

Which surface of a straight abrasive wheel should be used for general purpose grinding on a bench grinder?

Accepted Answer

The peripheral (outer) face of the wheel

Answer

The flat side face of the wheel

Answer

Either the side or peripheral face depending on preference

Answer

The inner bore surface with a suitable fixture

Question 4

How should a workpiece be supported when grinding on a bench grinder?

Accepted Answer

Firmly supported on the work rest

Answer

Held completely freehand without additional support

Answer

Gripped with both hands held well away from the wheel face

Answer

Secured in a floor-mounted vice beside the machine

Question 5

For how long should a newly mounted abrasive wheel be run before commencing grinding work?

Accepted Answer

At least one minute at full operating speed with the guard in place

Answer

No running-in period is required if the ring test was passed

Answer

30 seconds at half the rated speed

Answer

5 minutes at reduced speed followed by 5 minutes at full speed

Question 6

If a workpiece becomes excessively hot during grinding, what should the operator do?

Accepted Answer

Allow the workpiece to cool naturally or apply suitable coolant

Answer

Continue grinding to complete the task as quickly as possible

Answer

Increase grinding pressure to reduce the total grinding time

Answer

Quench it immediately in any available liquid to hand

Question 7

What does 'loading' of an abrasive wheel refer to?

Accepted Answer

The wheel's pores becoming blocked with ground material, reducing cutting efficiency

Answer

Placing a heavy workpiece on the work rest before grinding

Answer

Setting the machine to its maximum permitted operating speed

Answer

Adding counterweights to balance an out-of-balance wheel