Abrasive Wheels Training Certificate Cheat Sheet 2026

The 30 highest-yield Abrasive Wheels Training Certificate facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. At what height should the work rest be set relative to the centre of the abrasive wheel? → At or slightly above centre
2. What is the maximum permissible gap between the wheel and the work rest (toolrest) on a bench grinder? → 2 mm
3. What replaced the Abrasive Wheels Regulations 1970 as the primary legislation covering abrasive wheel safety in the UK? → PUWER 1998 combined with other relevant regulations
4. Which surface of a straight abrasive wheel should be used for general purpose grinding on a bench grinder? → The peripheral (outer) face of the wheel
5. A bench grinder has a spindle speed of 2,850 RPM. What is the maximum diameter wheel that can be used if the wheel's maximum peripheral speed is 33 m/s? → 221 mm
6. What immediate action should an operator take if an abrasive wheel begins to vibrate excessively during use? → Stop the machine immediately and report the fault to a competent person
7. What is the main difference between an organic bond and a vitrified bond in abrasive wheels? → Organic bonds (resinoid/rubber) are more flexible and shock-resistant than vitrified bonds
8. On a double-ended bench grinder, what is the purpose of the tongue guard (spark guard)? → To prevent sparks from reaching the operator and to limit the exposed portion of the wheel
9. Which regulation specifically requires that a person must be competent and trained before mounting an abrasive wheel? → PUWER 1998, Regulation 9
10. What is the maximum peripheral speed (surface speed) typically specified for vitrified bench grinding wheels? → 33 m/s (approximately 6,600 RPM for a 150mm wheel) unless otherwise specified on the wheel
11. Which HSE publication provides guidance on the safe use of abrasive wheels under PUWER? → HSE guidance document HSG17 'Safety in the use of abrasive wheels'
12. Before fitting an abrasive wheel to a machine, what speed-related check must the operator perform? → Verify that the machine's spindle speed does not exceed the wheel's maximum rated RPM
13. What is the minimum standard of eye protection required when using an abrasive wheel? → Safety spectacles conforming to BS EN 166 with appropriate impact rating
14. Which of the following describes the correct way to present a workpiece to a bench grinder wheel? → Into the downward rotation at the front of the wheel, supported on the work rest
15. If an abrasive wheel has a diameter of 300 mm and a maximum peripheral speed of 50 m/s, what is its maximum RPM? → 3,183 RPM
16. Under the Hand Arm Vibration Regulations 2005, what is the daily exposure action value for hand-arm vibration? → 2.5 m/s²
17. Which type of abrasive wheel is most commonly used for cutting ferrous metals such as mild steel? → Aluminium oxide wheel
18. Which abrasive wheel type would be most appropriate for cutting concrete and masonry? → Diamond-impregnated cutting wheel
19. After re-adjusting the work rest following wheel wear, what must be verified before resuming work? → The gap between the work rest and wheel is within the safe maximum
20. Under the Provision and Use of Work Equipment Regulations 1998 (PUWER), who is legally responsible for ensuring abrasive wheels are properly maintained? → The employer
21. What is the recommended standing position when first starting an abrasive wheel after mounting? → To one side of the wheel, out of the plane of rotation
22. What is the maximum speed for a standard cutting disc (Type 41/42) for an angle grinder under BS EN 12413? → 80 m/s for organic bond reinforced cutting discs — indicated by a red speed stripe
23. When applying a workpiece to a rotating abrasive wheel, what is the correct pressure to use? → Light, even, and controlled pressure
24. The HSE publication 'Safety in the Use of Abrasive Wheels' (HSG17) is which type of document? → HSE guidance providing practical advice on compliance
25. What is the maximum recommended gap between the work rest and an abrasive wheel on a bench or pedestal grinder? → 3 mm
26. What colour is the standard speed marking band on an abrasive wheel rated for a maximum speed of 50 m/s? → Blue
27. What happens to the centrifugal force acting on an abrasive wheel if the RPM is doubled? → It quadruples (increases by a factor of 4)
28. During inspection, what does excessive vibration of an abrasive wheel typically indicate? → The wheel may be out of balance, cracked, unevenly worn, or incorrectly mounted
29. Which type of abrasive wheel is specifically designed for use in cutting-off operations and is typically very thin? → Type 1 (flat/straight) cutting disc
30. Why must abrasive wheels be protected from frost during storage? → Water absorbed into the wheel can freeze and expand, causing internal cracks