There are several steps that must be undertaken before beginning grinding operations:
Ensure the wheel is properly clamped to the machine.
“Dress” and “True” the wheel.
“Sound” the wheel (if appropriate).
Antwort
Which of the following are precautions that must be taken when using portable grinding equipment?
Wheel Flaking.
Slow Grinding Speed.
Fast Grinding Speed.
Wheel “Perspiring”.
Excessive Run-out or “Wobble”.
Rapid Disc Wear/Short Blade Life.
Antwort
Which of the following are precautions that must be taken when using portable grinding equipment?
Always ensure that an appropriate guard is in place before you start your work.
Always consider the electrical dangers that may be presented from equipment cables or plugs.
Always carry out a visual check of the equipment to look for signs of damage.
Always ensure there are two points of exit from the grinding location in case of emergency.
Always wear breathing apparatus.
Antwort
Select the statements which identify safe working practices for the use of abrasive wheels.
To minimise the risk of bursting, abrasive wheels should always be run within the specified maximum rotation speed.
If a wheel is large enough the maximum rotation speed will be marked on the wheel.
Guards must be provided (on all types of wheel) to contain fragments that may fly off if the wheel bursts.
Relevant information and training should be provided to all personnel involved in the use of grinding operations.
For smaller wheels there should be a notice highlighting the maximum speed for each size of wheel.
Guards must be provided (on pedestal grinders only) to contain fragments that may fly off if the wheel burst.
Wheel rotation speeds (for all size of wheel) must be displayed on a notice.
Antwort
Select the statements which identify safe working practices for the use of abrasive wheels.
To minimise the risk of bursting, abrasive wheels should always be run within the specified maximum rotation speed.
What are the main hazards associated with grinding operations?
Loss of eyesight from flying shards.
Trapped or crushed fingers.
Serious friction burns from coming into contact with the wheel.
Repetitive Strain Injury.
Chemical burns.
Antwort
Which of the following types of abrasive wheel has a long, wide surface with no centre mounting support or hollow?
Cylinder wheel.
Tapered wheel.
Saucer wheel.
Straight wheel.
Carrying out grinding operations: “Guarding”:
The wheel should be guarded so that only the area of the wheel needed for the work is exposed.
There should be no guarding; the whole wheel should be exposed.
Only the area of the wheel needed for the work should be guarded; the non-work area of the wheel should be exposed.
Abrasive wheels are bonded together using ____ or inorganic substances, such as ____ to form a solid circular shape.
… organic … resin … saw.
… inorganic … oil … saw.
Select the relevant pieces of PPE to identify the minimum PPE required for grinding operations.
Earmuffs.
Goggles.
Dust mask.
Face shield.
Antwort
Этот тест оценивает базовые знания по безопасному использованию и обслуживанию абразивных кругов, что важно для предотвращения травм при их эксплуатации.
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