EWP Environmental and Weather Conditions 2 — Questions and Answers
Question 1: What instrument is used on or near an EWP worksite to accurately measure wind speed?
- Anemometer (Correct answer)
- Barometer
- Hygrometer
- Thermometer
Correct answer: Anemometer
An anemometer measures wind speed and is the appropriate instrument to determine whether conditions meet the manufacturer's safe operating wind speed limit.
Question 2: Under Australian WHS guidelines, who shares responsibility for monitoring weather conditions during EWP operations?
- Both the operator and the PCBU/supervisor share responsibility (Correct answer)
- Only the designated site safety officer is responsible for weather monitoring
- The equipment hire company must monitor weather conditions remotely
- Weather monitoring is the sole responsibility of the WorkSafe regulator
Correct answer: Both the operator and the PCBU/supervisor share responsibility
Under the WHS Act, both the PCBU (through supervision and planning) and the operator (through ongoing vigilance) share a duty of care to monitor and respond to changing weather conditions.
Question 3: When should an EWP operator consult the manufacturer's manual regarding weather operating limitations?
- Before every operation, as weather limits vary between different EWP models (Correct answer)
- Only when adverse weather is already actively affecting site conditions
- Once a year during the scheduled annual safety refresher training program
- Only when a replacement operator takes over the same machine mid-shift
Correct answer: Before every operation, as weather limits vary between different EWP models
Weather operating limits differ between EWP models, so operators must check the specific manufacturer's manual before each shift to know the applicable thresholds.
Question 4: What should an EWP operator do when dark storm clouds are observed approaching the worksite?
- Lower the EWP to ground level and move it to a sheltered location before the storm arrives (Correct answer)
- Complete the current task as quickly as possible before the storm reaches the site
- Raise the EWP platform higher to maintain visibility above the incoming cloud
- Continue working and wait only for an official site shutdown instruction to be given
Correct answer: Lower the EWP to ground level and move it to a sheltered location before the storm arrives
Proactively lowering and sheltering the EWP before storm arrival prevents exposure to high winds, lightning, and sudden weather changes that could make safe descent more difficult.
Question 5: What is the primary reason wind speed is a critical factor when operating an EWP with a long elevated boom?
- Wind creates a horizontal force on the boom and platform, increasing the tip-over risk (Correct answer)
- Wind only affects the operator's comfort and concentration, not the machine's stability
- Wind exclusively increases fuel consumption of the EWP drive engine during operation
- Wind speed concerns only apply to boom-type EWPs operating directly over water
Correct answer: Wind creates a horizontal force on the boom and platform, increasing the tip-over risk
Horizontal wind forces acting at the end of an extended boom create a significant overturning moment at the machine's base, which can exceed the rated stability of the EWP.
Question 6: Why must EWP operators working near a coast or in open paddock areas be especially vigilant about wind conditions?
- Wind speeds are typically higher and more variable in open and coastal environments (Correct answer)
- Salt air causes immediate corrosion of EWP structural components during operation
- Coastal areas have no overhead hazard restrictions allowing higher EWP working heights
- Open areas allow higher wind speed tolerances because there are fewer physical obstacles
Correct answer: Wind speeds are typically higher and more variable in open and coastal environments
Open and coastal environments lack natural windbreaks such as buildings and trees, exposing EWPs to stronger and more unpredictable gusts than sheltered urban worksites.
Question 7: What weather-related information should an operator record in the EWP logbook or daily pre-start checklist?
- Current weather conditions and any weather-related hazards identified prior to commencing work (Correct answer)
- Nothing — weather recording is not a standard part of EWP pre-start documentation
- Only wind speed readings that exceed 50 km/h need to be formally recorded
- Weather data is only required for inclusion in monthly site safety compliance reports
Correct answer: Current weather conditions and any weather-related hazards identified prior to commencing work
Recording weather conditions in the pre-start checklist creates documented evidence for operational decisions and supports incident investigation if conditions change during the shift.
EWP Environmental and Weather Conditions 2
What instrument is used on or near an EWP worksite to accurately measure wind speed?