WorksheetsRME Review - Repair and Maintenance
Total questions: 20
Worksheet time: 10mins
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
What is the most likely cause of excessive noise in an electrical transformer?
proper grounding
loose core laminations or winding issues
low current floq
perfect insulation resistance
Which component in an electric motor requires periodic lubrication?
windings
bearings
core
circuit breaker
What is a key safety measure when working on a high-voltage electrical system?
wearing conductive gloves
using insulated screwdriver and tools
standing in water for better ground
use metal ladders
What does a high resistance reading in a continuity test indicate?
broken connection
properly functioning circuit
fully charged capacitor
short circuit
Which type of maintenance is performed only after a failure has occurred?
preventive
predictive
corrective
condition-based
What is the function of a ground fault circuit interrupter (GFCI)?
regulate voltage supply
detect and interrupt ground faults to prevent electric shock
increase the current flow
amplify electrical voltage
A motor is running but producing less torque than normal. What is a possible cause?
low voltage supply
correctly functioning bearings
proper torque settings
fully insulated windings
What is the first step when troubleshooting a dead electrical circuit?
replacing the wiring withut testing
checking the voltage supply
resetting thermal overload relay
ignore all visible damage
What should an electrician do if a cable shows signs of overheating?
increase the load
check the cause of overheating and replace the wire
ignore until failure occurs
cover it with insulation tape
What is the purpose of a Voltage Proving Unit (VPU) in electrical maintenance?
to step up voltage
to safely verify that a voltage tester or multimeter is working before and after use
to measure insulation resistance
to replace the GFCI
