Oil, Sparks and a Partly Locked Hoist
At a two-wheeler and car service garage in Hubballi, the floor of bay 2 is coated with engine oil from a drained sump. A 19-year-old trainee is asked to grind a seized exhaust stud using a 100 mm angle grinder while a mechanic MIG-welds a sill 3 m away. The shutter is half-closed because it is raining, and a petrol-powered generator runs outside the rear door. The car on the adjacent two-post hoist is a 1,240 kg hatchback; its rated capacity is 3,000 kg, but the front-right arm's rubber pad is missing and the arm lock is not fully engaged. The supervisor is away for 20 minutes. The trainee has safety shoes but no goggles, and his cotton gloves are oil-soaked. A fire extinguisher is mounted 15 m away behind a stack of tyres.
1. Rank the hazards in this bay from most urgent to least urgent, and state the first three actions you would take before any work continues.
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Most urgent is the hoist: a 1,240 kg car is held with one arm lock not fully engaged and a missing pad, so the load can shift or an arm can slip. Next is ignition risk: grinding sparks, a floor wet with oil, oil-soaked gloves, and MIG welding only 3 m away. Third is exposure to generator exhaust in a half-closed bay. Eye injury and the blocked extinguisher follow.
First actions: stop the grinding and welding; lower the hoist only from the control with nobody underneath, then engage both arm locks or move the car to a safe bay; move the generator outdoors away from openings. Then clean the oil with absorbent and replace the trainee's gloves and add goggles before restarting. The reasoning is to remove the consequence - falling car, fire, carbon monoxide - before relying on training or supervision.
2. The supervisor returns. Write a short corrective plan covering housekeeping, hot-work control, PPE and emergency access, giving a reason for each item.
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- Housekeeping: spread absorbent on the oil, sweep up, and put oily waste in a lidded metal bin. Oil on the floor plus sparks is a fire path and a slip hazard.
- Hot-work control: clear combustibles within about 10 m, use screens, appoint a fire watch, and keep an extinguisher within reach. Grinding and welding sparks travel and can ignite oil-soaked material.
- PPE: goggles or face shield for grinding; oil-free, close-fitting gloves or no gloves near the rotating grinder; hearing protection. Oil-soaked cotton burns, and a loose glove can be caught by the wheel.
- Emergency access: move the tyre stack, mark the extinguisher, and check its gauge. A blocked extinguisher adds delay when seconds matter.
- Ventilation: keep the generator outside and open the shutter. This reduces carbon monoxide and fume build-up.
- Record the instruction and check the trainee understands it; supervision is not a substitute for engineering controls.
3. The trainee argues that oil-soaked gloves protect his hands and that the hoist is safe because it is rated for 3,000 kg and the car weighs only 1,240 kg. Explain why both statements are wrong.
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Oil-soaked gloves do not protect: oil weakens cotton, reduces grip, and makes the glove flammable. Near a grinder, a loose or oily glove can also be caught and pull the hand into the wheel. The right control is clean, close-fitting protection or bare hands kept clear of the wheel, not oil-soaked fabric.
The hoist rating is a maximum, not a guarantee that any load is stable. The car is well below 3,000 kg, but a missing pad creates point loading and reduced friction, and an unengaged arm lock can let the arm drop. Safe lifting depends on correct arm placement, all locks engaged, sound pads, and the centre of gravity between the arms. The trainee is confusing capacity with load security.