Free C10 Electrical Exam

Welcome to your free C-10 Electrical Quiz

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1. 
A three-phase transformer provides 208/120- volt power to a building with metal siding. What should be done?

2. 
What should you do to safeguard a temporary power supply on a jobsite?

3. 
You are replacing a 20-amp receptacle in a bakery and notice a 14 gauge wire running from the same circuit to a light. What should you do to correct the problem?

4. 
On a 480V, three-phase blower motor with auxiliary contacts and indicators, the push-button start is off due to a thermal overload. What is the most likely cause?

5. 
How do you test a GFCI?

6. 
When testing a GFCI trip, probe conductor, and fixture ground, use__________.

7. 
A fuse is blown on a 480V, three-phase blower motor with auxiliary contacts and indicators. What is the most likely cause?

8. 
A homeowner installed a light in the garage, but when turned on it glowed very bright and then burned out. What is the most likely cause?

9. 
When a house heater comes on, some lights get bright, others get dim. What could cause this?

10. 
On a walk-through of a new home, the owner wants you to install an outlet beside the stove. The countertop is 48 inches long and the wall is 6 feet away. The contractor__________.