RME Review - Repair and Maintenance

What is the primary goal of preventive maintenance in electrical systems?

• To fix equipment only after it fails

• To increase breakdown frequency

• To perform regular inspections and servicing to prevent failures

• To avoid the use of protective equipment

Which of the following is a key step before performing any electrical maintenance work?

• Checking if the power supply is stable

• Using metal tools for better conductivity

• Following the Lockout/Tagout (LOTO) procedure

• Keeping the equipment running during inspection

Which of the following is an example of predictive maintenance?

• Replacing fuses after they blow

• Using infrared thermography to detect overheating components

• Cleaning electrical panels once a year

• Waiting for a circuit breaker to trip before checking the circuit

Why is it important to perform insulation resistance tests in electrical maintenance?

• To increase circuit resistance

• To detect insulation breakdown before it causes a failure

• To improve power factor

• To decrease voltage levels

What tool is commonly used to measure voltage, current, and resistance in troubleshooting electrical systems?

• oscilloscope

• multimeter

• megger

• torque wrench

A technician is troubleshooting a motor that does not start. What should be checked first?

• The motor’s cooling fan

• The voltage supply and circuit breakers

• The motor’s nameplate information

• The paint condition of the motor

What is a common sign of a failing electrical motor?

• Smooth and quiet operation

• Increased vibration and overheating

• Decreased power factor correction

• No electrical resistance in the windings

Which of the following is a common cause of overheating in electrical panels?

• proper ventilation

• loose or corroded connections

• low voltage

• ground fault

What should be done before replacing a fuse in an electrical panel?

• increase the circuit load

• check the cause of the blown fuse

• use higher-rated fuse to prevent failure next time

• replace the fuse without testing

What is the purpose of thermal imaging in electrical maintenance?

• to measure voltage

• to detect hot spots and overheating components

• replace faulty circuit

• check the thickness of the insulation