Skilled Trades Practice test Please wait... 1. What is the minimum working clearance generally required in front of most 480V electrical panels?6 inches1 foot3 feet10 feet 2. What is sludge?Chemical additive Solid waste from treatment Clean water Gas byproduct 3. What is a lift station?Removes solids Pumps wastewater uphill Adds oxygen Filters water 4. Which device is designed to protect equipment from voltage spikes?Fuse HolderRelaySurge ProtectorDisconnect 5. Which process removes sand and grit?Aeration Sludge digestion Grit chamber Clarification 6. What device converts a 4–20 mA signal into a 3–15 PSI signal?Capacitor Transformer I/P transducer Relay 7. Why should energized troubleshooting be minimized whenever possible?Increased grounding effectivenessReduced conductor resistanceIncreased shock and arc flash riskLower meter accuracy 8. Why are torque specifications important on lugs and terminals?Increase voltage stabilityPrevent loose or damaged connectionsReduce conduit fillImprove power factor 9. Why are motor circuits often allowed larger breaker sizes?Neutral balancingGrounding compensationStartup inrush currentVoltage stabilization 10. What is a facultative organism?Can live with or without oxygen Requires oxygen Only anaerobic Dies without oxygen Loading...
