Abrasive Wheels Training Certificate Angle Grinder Safety & PPE

Question 1

What PPE is mandatory when using an angle grinder?

Accepted Answer

Safety goggles or face shield, hearing protection, dust/fume RPE (minimum FFP2), leather or cut-resistant gloves, and safety footwear; high-visibility clothing if near traffic

Answer

Angle grinder PPE must address all identified hazards: face shield or safety goggles (eye/face injury from sparks and fragments), hearing protection (95–110 dB(A)), RPE appropriate to the material being ground (minimum FFP2, P3 for toxic dusts), cut-resistant gloves, safety footwear. The guard does not eliminate the need for eye protection.

Question 2

Why should leather gloves be worn rather than standard work gloves when using an angle grinder?

Accepted Answer

Leather provides protection against hot sparks, abrasion from the disc if accidental contact occurs, and vibration transmission reduction; synthetic gloves can be grabbed by the disc and drawn in

Answer

Leather gloves resist hot sparks without melting onto the skin, provide some abrasion resistance if the disc contacts the hand (though cannot prevent serious injury), and slightly attenuate vibration. Synthetic or fabric gloves can melt from sparks or be caught by the disc, potentially drawing the hand into the grinding surface.

Question 3

What is 'kickback' on an angle grinder and how does it occur?

Accepted Answer

Sudden violent rotation of the grinder opposite to the disc rotation direction when the disc binds, catches, or pinches in the workpiece — caused by cutting through thin sections or using worn discs

Answer

Kickback occurs when the grinding disc suddenly stops rotating due to pinching, binding, or catching in the workpiece. The disc's stored kinetic energy is violently transferred to the machine body, rotating it rapidly in the opposite direction (counter-rotation). The resulting sudden movement can cause severe hand, arm, or head injury.

Question 4

What is the safe technique for cutting with a thin cut-off disc to avoid disc breakage?

Accepted Answer

Apply light, steady pressure; never twist or lever the disc sideways; allow the disc to cut freely in a straight line; use two hands on the machine

Answer

Cut-off discs must only experience forces in the plane of rotation (forward cutting pressure). Any twisting, rocking, or lateral force causes flexural stress for which thin discs have almost no tolerance. The disc will crack and burst. Two-handed control, light steady pressure, and a straight cut line are the key technique points.

Question 5

What respiratory protective equipment (RPE) face piece is required when dry grinding stainless steel?

Accepted Answer

A minimum of FFP3 disposable respirator or half-face P3 respirator, as stainless steel grinding produces hexavalent chromium — a confirmed carcinogen

Answer

Grinding stainless steel generates hexavalent chromium (Cr(VI)) fume — a Group 1 carcinogen with a very low WEL of 0.01 mg/m³. FFP3 or P3 filter class provides the highest particle filtration efficiency (>99%). LEV alone may not be sufficient in some positions, making high-efficiency RPE essential as an additional control.

Abrasive Wheels Practice Test

Abrasive Wheels Practice Test

Abrasive Wheels Training Certificate Angle Grinder Safety & PPE