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

Standing to the side of the wheel's plane of rotation means that if the wheel bursts, the fragments are less likely to strike the operator directly.

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

Light, even pressure ensures controlled grinding, prevents overheating of the workpiece, and reduces the risk of the wheel shattering due to sudden impact loading.

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

General purpose grinding must only be performed on the peripheral face; using the flat side creates lateral stresses that straight wheels are not designed to withstand, risking breakage.

Question 4

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

Accepted Answer

Firmly supported on the work rest

Answer

The workpiece must be firmly supported on the work rest at all times to maintain control and prevent it from being snatched violently by the rotating wheel.

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

A newly mounted wheel must be run for at least one minute at full operating speed with guards fitted to reveal any faults such as vibration, cracks, or imbalance before it contacts a workpiece.

Abrasive Wheels Practice Test

Abrasive Wheels Practice Test

Abrasive Wheels Training Certificate Work Rest Adjustment and Operating Techniques 2