NABCEP OMAT Exam Prep: Free Operations & Maintenance Practice Questions

Practice Questions

Safety

• Hierarchy of Controls: Is a Harness PPE or an Engineering Control? Safety Application
• Lockout/Tagout on the DC Side: What a Locked Disconnect Does Not Do Safety Application
• Arc Flash: The Label Is Six Years Old and the Equipment Is Not Safety Technical
• Battery Cabinet: Swollen Cases, Fan Not Running — Which Hazard First? Safety Application
• Restraint or Arrest? Fall Protection on an Array-Covered Roof Safety Application
• PPE Layers: What You Wear Under Arc-Rated Clothing Safety Application

Core Knowledge

• Millivolt Drop on a Hot Connection: What the Numbers Mean Core Knowledge Technical
• Watts or Watt-Hours? One Figure in This Report Is Wrong Core Knowledge Recall
• One String Reads 80 V Low, Current Normal: What Changed? Core Knowledge Application
• A Cut Bonding Jumper, No Production Loss: Can It Wait? Core Knowledge Application
• The Grid Is Out. Is the AC Side Dead? Core Knowledge Application
• 400 W Nameplate, 318 W Measured: Are the Modules Failing? Core Knowledge Technical
• Same Fault Code, Two Sites, One Truck: Which First? Core Knowledge Application
• The Fire Marshal Says Move It. Whose Rule Is That? Core Knowledge Application
• Two Connectors That Click Together, Two Different Makes Core Knowledge Application

Existing System Infrastructure Considerations

• Two Dead Strings at Opposite Ends of the Roof Infrastructure Application
• A 415 W Module Replaced a 400 W One and Output Fell Infrastructure Application
• The Same Cable Is Fine Inside the Conduit and Wrong Outside Infrastructure Technical
• Ballast Blocks Put Back After a Roof Repair Infrastructure Application
• The Lug Says 275 in-lb and the Van Has a ft-lb Wrench Infrastructure Technical
• Ground Faults Only on Windy Days and After Rain Infrastructure Application
• The Clearance Is Gone and the Customer Wants It Fixed Today Infrastructure Application
• The Customer Asks for Two Settings Changes Infrastructure Application

Operations and Maintenance

• Isc Normal, Voc Normal, and the Knee Has Gone Soft O&M Technical
• Down 11% in Two Years With No Alarms O&M Application
• Before You Connect the Megohmmeter O&M Technical
• Isolate, Wait, Test, Zero. What Is Missing? O&M Technical
• Three Rows You Could Not Reach, and What the Report Says O&M Application
• One Warm Cell, a Day of Travel, Six Weeks to the Next Visit O&M Application
• The EPC Needs Your Signature Today O&M Application