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Introduction to Abrasive Wheels

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About this collection

MINTRA CET includes short topic-based sets such as incident investigation, accommodation safety, anchoring operations and firefighting. Study an individual module, then review your mistakes in your account.

“MINTRA CET — Introduction to Abrasive Wheels” contains 10 questions across 1 collection.

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Sample questions and answers

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Which of the following types of abrasive wheel has a long, wide surface with no centre mounting support or hollow?

One correct answer

  • Cylinder wheel.✓ Correct answer
  • Tapered wheel.
  • Saucer wheel.
  • Straight wheel.
There are several steps that must be undertaken before beginning grinding operations:

One correct answer

  • Step 1: “Sound” the wheel (if appropriate); Step 2: Ensure the wheel is properly clamped to the machine; Step 3: “Dress” and “True” the wheel.✓ Correct answer
  • Step 1: “Dress” and “True” the wheel; Step 2: Ensure the wheel is properly clamped to the machine; Step 3: “Sound” the wheel (if appropriate).
  • Step 1: Ensure the wheel is properly clamped to the machine; Step 2: “Dress” and “True” the wheel; Step 3: “Sound” the wheel (if appropriate).
Abrasive wheels are bonded together using ____ or inorganic substances, such as ____ to form a solid circular shape. However, unlike a saw, which has teeth only on its edge, the grinding wheel has abrasive grains distributed ____ the wheel. Thousands of these hard, tough ____ move against the work-piece to cut away tiny chips of material.

One correct answer

  • … organic … resin … saw … throughout … grains.✓ Correct answer
  • … inorganic … oil … saw … grains … throughout.
Which of the following are precautions that must be taken when using portable grinding equipment?

Multiple correct answers

  • Wheel Flaking.✓ Correct answer
  • Slow Grinding Speed.✓ Correct answer
  • Fast Grinding Speed.
  • Wheel “Perspiring”.
  • Excessive Run-out or “Wobble”.✓ Correct answer
  • Rapid Disc Wear/Short Blade Life.✓ Correct answer
Select the statements which identify safe working practices for the use of abrasive wheels.

Multiple correct answers

  • To minimise the risk of bursting, abrasive wheels should always be run within the specified maximum rotation speed.✓ Correct answer
  • If a wheel is large enough the maximum rotation speed will be marked on the wheel.✓ Correct answer
  • Guards must be provided (on all types of wheel) to contain fragments that may fly off if the wheel bursts.✓ Correct answer
  • Relevant information and training should be provided to all personnel involved in the use of grinding operations.✓ Correct answer
  • For smaller wheels there should be a notice highlighting the maximum speed for each size of wheel.✓ Correct answer
  • 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.

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