CPCS Pre-Use Checks 4 — Questions and Answers
Question 1: What is the correct action if a pre-use check reveals the plant's rated capacity plate is missing or illegible?
- Take the plant out of service until the plate is replaced or made legible (Correct answer)
- Estimate the capacity from memory and continue
- Ask the hire company by phone for the capacity
- Operate at half capacity as a precaution
Correct answer: Take the plant out of service until the plate is replaced or made legible
The rated capacity plate is essential safety information. Without it, operators cannot confirm safe working limits. The plant must be taken out of service until the plate is replaced and legible.
Question 2: Why should an operator walk around the plant before starting it for the first time each shift?
- To check for damage, obstructions, leaks, and persons or objects in the danger zone (Correct answer)
- Only to check that the plant is in the correct position
- To warm up their muscles before operation
- To check that the fuel has been delivered overnight
Correct answer: To check for damage, obstructions, leaks, and persons or objects in the danger zone
A walk-around check identifies overnight damage, fluid leaks, obstructions, missing safety items, and — critically — any persons or objects within the plant's operating zone before movement begins.
Question 3: During a pre-use check on an excavator, you notice one of the bucket teeth is missing. What should you do?
- Report it and assess whether it is safe to operate — missing teeth can cause structural imbalance and increased wear (Correct answer)
- Continue working — one missing tooth will not affect performance
- Replace the tooth yourself from the site tool store
- Ignore it as bucket teeth are consumable items and not safety-critical
Correct answer: Report it and assess whether it is safe to operate — missing teeth can cause structural imbalance and increased wear
Missing bucket teeth can affect machine balance, increase stress on the bucket structure, and create projectile hazards. This must be reported and assessed by a competent person before continued use.
Question 4: What should an operator check regarding the plant's emergency stop or shutdown system during a pre-use check?
- That it is accessible, functional, and clearly identified (Correct answer)
- Emergency stops are only relevant indoors
- That it is sealed to prevent accidental use
- Emergency stops do not apply to mobile plant
Correct answer: That it is accessible, functional, and clearly identified
Emergency stop systems must be accessible to the operator, clearly identified, and confirmed as functional during pre-use checks. An inaccessible or non-functional emergency stop is a serious safety defect.
Question 5: During a pre-use check, you find excessive play in the steering system. What action do you take?
- Take the plant out of service immediately — excessive steering play is a serious control defect (Correct answer)
- Drive slowly and use wide turns to compensate
- Report it at the end of the shift
- Adjust the steering yourself using the manufacturer's instructions
Correct answer: Take the plant out of service immediately — excessive steering play is a serious control defect
Excessive play in steering means the operator cannot accurately control direction, creating serious risk of collision or running over persons. The plant must be taken out of service immediately.
Question 6: What information should be recorded when completing a pre-use check sheet?
- Date, plant identification, operator name, findings, and any defects noted (Correct answer)
- Only the date and operator name
- Only defects found — clear checks do not need recording
- Only defects that prevent the plant from operating
Correct answer: Date, plant identification, operator name, findings, and any defects noted
A complete pre-use check record includes the date, plant identification number, operator's name, findings for each check item, any defects identified, and the action taken in response.
CPCS Pre-Use Checks 4
What is the correct action if a pre-use check reveals the plant's rated capacity plate is missing or illegible?