Work Rest Adjustment and Operating Techniques Flashcards
7 cards from real Abrasive Wheels Training Certificate practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Work Rest Adjustment and Operating Techniques flashcards as text
What is the correct stance for an operator using a bench or pedestal grinder?
Answer: Stand to one side, clear of the wheel's plane of rotation
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.
When applying a workpiece to a rotating abrasive wheel, what is the correct pressure to use?
Answer: Light, even, and controlled pressure
Light, even pressure ensures controlled grinding, prevents overheating of the workpiece, and reduces the risk of the wheel shattering due to sudden impact loading.
Which surface of a straight abrasive wheel should be used for general purpose grinding on a bench grinder?
Answer: The peripheral (outer) face of the wheel
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.
How should a workpiece be supported when grinding on a bench grinder?
Answer: Firmly supported on the work rest
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.
For how long should a newly mounted abrasive wheel be run before commencing grinding work?
Answer: At least one minute at full operating speed with the guard in place
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.
If a workpiece becomes excessively hot during grinding, what should the operator do?
Answer: Allow the workpiece to cool naturally or apply suitable coolant
The workpiece should be allowed to cool or appropriate coolant should be applied; continuing to grind an overheated workpiece risks burning the operator and can adversely alter the material's properties.
What does 'loading' of an abrasive wheel refer to?
Answer: The wheel's pores becoming blocked with ground material, reducing cutting efficiency
Loading occurs when swarf or metal particles clog the pores between the abrasive grains, preventing the wheel from cutting effectively and causing excessive heat through friction.