SafetyQuestion 105 of 110
Before servicing a sewage ejector pump, the plumber must control hazardous energy. What procedure prevents the pump from starting during service?
a.Lockout/tagout of the electrical disconnect, then verify zero energy
b.Post a verbal warning
c.Unplug only if convenient
d.Work quickly between cycles
Explanation
Lockout/tagout requires de-energizing the pump at its disconnect, applying a personal lock and tag, and verifying zero energy by attempting to start it before hands go near moving parts. An automatic float could start the pump unexpectedly and cause severe injury. Each worker applies their own lock.
Law Reference: 29 CFR 1910.147Practice all 110 questions free — no signup required.
Related questions on this topic
- A 2,000 lb cast-iron section is lifted by a two-leg sling with each leg at 60 degrees from horizontal. Each leg carries (load / 2) / sin(60 degrees), with sin(60) about 0.866. What is the tension in each sling leg?
- During sewer confined-space work, the attendant outside must maintain what capability?
- A trench 10 ft deep in Type B soil is sloped at 1 to 1 (horizontal to vertical) on both sides. If the trench bottom is 3 ft wide, how wide is the excavation at the top?
- A trench 90 ft long and 6 ft deep requires egress so no worker travels more than 25 ft laterally to a ladder. A ladder placed mid-run protects 25 ft in each direction, or 50 ft total. What is the minimum number of ladders required?
- On a California jobsite, a trench 5 ft or deeper in which workers will enter also requires a specific state permit beyond federal rules. What is that requirement?
- Cutting and grinding cast iron or concrete for a plumbing penetration generates respirable crystalline silica. What is the primary control the plumber should use?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against Master Plumber Licensing Exam (UPC/IPC-based) · How we review