What should be checked during routine maintenance in a terminal box?

• A. Wire tension
• B. Presence of dust
• C. Insulation resistance
• D. Connection or tightness of wires

What is the purpose of a fuse in an electrical circuit?

• A. To regulate voltage
• B. To disconnect the circuit during overload
• C. To provide a backup power source
• D. To prevent short circuits

What type of motor is commonly used in elevators?

• A. Induction motor
• B. DC motor
• C. Slip ring motor
• D. FR motor

What should be done after removing a damaged bearing?

• A. Reinstall the same bearing
• B. Replace it with a new one
• C. Clean and reuse it
• D. Lubricate the old bearing

What connection is typically used for ballast pumps?

• A. Star connection
• B. Delta connection
• C. Series connection
• D. Parallel connection

During troubleshooting, what is the first step?

• A. Replace the faulty component
• B. Conduct a root cause analysis
• C. Perform visual inspection or gather information
• D. Check the torque settings

How is insulation measured in electrical systems?

• A. Ammeter
• B. Voltmeter
• C. Megger tester
• D. Ohmmeter

What is the purpose of a magnetic contactor?

• A. To trip during overcurrent
• B. To disconnect the circuit
• C. To measure insulation
• D. To prevent overvoltage

What causes inefficient carbon pressure in motors?

• A. Dust accumulation
• B. Sparking
• C. Loose wires
• D. High voltage

Which component provides the pulling force for motor rotation?

• A. Stator
• B. Rotor
• C. U-belt
• D. Spacer