What is the purpose of an interlock?

• A. To increase speed
• B. To prevent dangerous or unintended operations
• C. To reduce noise
• D. To improve insulation

What is the purpose of a capacitor in a single-phase motor?

• A. To reduce voltage
• B. To provide and improve torque
• C. To increase resistance
• D. To stabilize current

Which fault occurs in a single-phase system?

• A. Ground fault
• B. Open-line fault
• C. Short circuit
• D. Overcurrent

What tool is best for measuring insulation?

• A. Multimeter
• B. Megger tester
• C. Ammeter
• D. Oscilloscope

Low voltage usually corresponds to:

• A. Ground fault
• B. Short circuit
• C. Open-line fault
• D. Overheating

What is the main cause of an open-line fault?

• A. Overheating
• B. Loose connection
• C. Excessive load
• D. Poor grounding

What happens in a grounded circuit?

• A. Increased voltage and current
• B. Reduced current and voltage
• C. Stabilized torque
• D. Overheating of components

What is the first step in electrical troubleshooting?

• A. Root-cause analysis
• B. Gathering information/visual inspection
• C. Testing the insulation
• D. Checking connections

What is essential in troubleshooting?

• A. Voltage stabilizer
• B. Temperature
• C. Resistance meter
• D. Speed control

After repairing a fault, what should be done next?

• A. Perform a root-cause analysis
• B. Replace the entire circuit
• C. Reset the system
• D. Test the capacitor