SHS Equipment Operation & Maintenance 2 — Questions and Answers
Question 1: A worker notices hydraulic fluid leaking from a lift truck during operation. What is the correct immediate action?
- Continue use until the shift ends, then report it
- Shut down the equipment and tag it out of service (Correct answer)
- Add more hydraulic fluid and monitor the leak
- Reduce the load and finish the current task
Correct answer: Shut down the equipment and tag it out of service
A hydraulic leak indicates a potential failure risk; the equipment must be shut down and tagged out of service immediately.
Question 2: Which OSHA standard governs the control of hazardous energy (lockout/tagout) during equipment maintenance?
- 29 CFR 1910.132
- 29 CFR 1910.147 (Correct answer)
- 29 CFR 1910.217
- 29 CFR 1910.305
Correct answer: 29 CFR 1910.147
29 CFR 1910.147 is OSHA's Control of Hazardous Energy standard, commonly known as the lockout/tagout standard.
Question 3: When must a pre-operational inspection of powered industrial trucks be performed?
- Once per week before Monday's first shift
- Only after a reported incident or near-miss
- Before each shift or before use if used by multiple shifts (Correct answer)
- At the beginning of each month
Correct answer: Before each shift or before use if used by multiple shifts
OSHA 29 CFR 1910.178(q)(7) requires powered industrial trucks to be inspected before each shift or before each use if used by multiple operators.
Question 4: A pressure relief valve on a boiler fails to open at the set pressure. What hazard does this create?
- Reduced fuel efficiency
- Risk of pressure vessel rupture or explosion (Correct answer)
- Excessive steam condensation
- Thermal expansion of supply lines only
Correct answer: Risk of pressure vessel rupture or explosion
A failed pressure relief valve allows pressure to exceed safe design limits, risking catastrophic rupture or explosion of the pressure vessel.
Question 5: Which type of maintenance strategy involves replacing parts based on a fixed time schedule, regardless of condition?
- Predictive maintenance
- Corrective maintenance
- Preventive maintenance (Correct answer)
- Condition-based maintenance
Correct answer: Preventive maintenance
Preventive maintenance uses scheduled intervals to replace or service parts before failure occurs, regardless of current condition.
Question 6: An operator is asked to use a grinding wheel rated at 4,000 RPM on a grinder set to run at 5,500 RPM. What should the operator do?
- Use it briefly to check performance
- Refuse and report the mismatched rating to the supervisor (Correct answer)
- Reduce the grinder speed using the speed control knob
- Wear extra PPE and proceed cautiously
Correct answer: Refuse and report the mismatched rating to the supervisor
Operating a grinding wheel beyond its rated RPM can cause the wheel to shatter violently; the operator must refuse and report the hazard.
Question 7: What does the term 'zero energy state' mean in the context of equipment maintenance?
- The machine is running at minimum power
- All energy sources are isolated and residual energy is released or restrained (Correct answer)
- The main power switch is turned to the off position only
- Emergency stop buttons have been pressed
Correct answer: All energy sources are isolated and residual energy is released or restrained
Zero energy state means all forms of hazardous energy (electrical, pneumatic, hydraulic, gravitational, thermal) are isolated and any stored energy is safely released or blocked.
SHS Equipment Operation & Maintenance 2
A worker notices hydraulic fluid leaking from a lift truck during operation.
What is the correct immediate action?