Safe Operating Procedures Flashcards

What is the maximum wind speed at which outdoor MEWP operations should generally cease according to IPAF guidance?

Answer: 28 mph (45 km/h)

IPAF guidance states that MEWP operations should cease when wind speed reaches 28 mph (12.5 m/s or 45 km/h). At this speed, the wind force on the platform and operator can affect stability and control of the machine.

An operator needs to extend the reach of the MEWP platform. Is it acceptable to use ladders or step-ups inside the basket?

Answer: No, this is strictly prohibited as it raises the operator's centre of gravity

Using ladders, step-ups, boxes, or any objects to gain additional height inside the basket is strictly prohibited. This raises the operator's centre of gravity above the guardrails, creating a serious fall risk and potentially overloading the platform.

What type of Personal Protective Equipment (PPE) should an operator wear when using a boom-type MEWP (Category 3b)?

Answer: A full body harness with a short lanyard attached to the designated anchor point

On boom-type MEWPs (3b), operators must wear a full body harness with a short restraint lanyard attached to the manufacturer's designated anchor point. This prevents the operator from being catapulted out of the basket during sudden movements.

Before driving a MEWP to a new location, what must the operator ensure?

Answer: The platform is fully lowered and stowed, and the travel route is clear of overhead obstructions and ground hazards

Before travelling, the platform must be fully lowered and stowed to maintain the machine's stability and keep the centre of gravity low. The travel route must be checked for overhead obstructions, slopes, holes, and soft ground.

What is the primary purpose of the tilt sensor (or inclination alarm) fitted to most MEWPs?

Answer: To warn the operator if the machine exceeds its safe operating angle on a slope

The tilt sensor or inclination alarm monitors the angle of the chassis. If the machine exceeds its maximum safe operating gradient (typically 3-5 degrees for most MEWPs), it triggers an audible and visual alarm to warn the operator of a potential overturn risk.

An operator is working in a boom lift near overhead power lines. What is the minimum safe exclusion zone for voltages up to 33kV according to UK HSE guidance?

Answer: 9 metres

The UK HSE guidance (GS6) recommends a minimum exclusion zone of 9 metres from overhead power lines carrying voltages up to 33kV. Electricity can arc across gaps, so maintaining this distance is critical to preventing electrocution.