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WorksheetsMotor Maintenance
Total questions: 30
Worksheet time: 44mins
Motor life can be extended by performing motor maintenance at ____________.
apart and different dates
Regular intervals
no need for maintenance
None of the above
The frequency of service required varies depending on _____ ,
_____, _____ and of each motor.
the environment
importance
availability
All of the above
One of the most common causes of motor Failure is
Moisture
air
normal temperature
The FIRST step in motor maintenance is
Feel for heat and vibration
feel for air passage
listen to abnormal noises
none of the above
Loose mounting bolts will cause
harmonics
irregular voltage
Heat
Vibration
what is accumulated on the motor in this picture
Dirt
Moisture
Loose bolts
Some motors employ protective relay to display
Current
Voltage
Trmperature
All of the above
Point of air entry is called
intake
exhaust
air passage
cooling system
A larger motors could be opened up for examining the _______.
External parts
Internal parts
All parts
What is this called?
Circuit diagram
Motor Nameplate
Datasheet
Excessive heat can be sign of:
adequate cooling
Winding failure
adequate lubrication
All of the above
Devices for temperature measurements
Resistance temperature detector
Thermometer
Infrared thermal imaging camera
ALL of the above
Bearing are used to support
radial loads
axial load
both radial and axial load
None of the loads
Which types of rolling element bearing is this?
Roller bearing
Ball bearing
Sleeve bearing
One-piece of sleeve bearing normally used in
small motors
Large motors
Bearing lubrication
harmonics
Which type of bearing is this?
Sleeve bearing
ball bearing
Roller bearing
Do not allow any more
than ____% unbalance in the three-phase voltage provided to the motor.
2%
5%
10%
15%
Which type of wave is this?
Sinusoidal wave
square wave
Harmonic distortion
The excessive heat causes ______ to fail prematurely.
insulation
coupling
bearing
What does this wave represents?
Sinusoidal wave
Harmonic distortion
Square wave
What does this device represent?
Oil level
Sleeve bearing
Thermometer
THD represent
Total Harmonic Distortion
Tempature Heat Detector
Bearing should be lubricated
daily
monthly
annualy
every two years
Draw Stator and rotor with identifing air gap
Draw Harmonic distorted wave
Draw your favorite car
What is your favorite Football club
Al Hilal
Al Ittihad
Al Nasr
Al Ahli
Favorite League
Premier League
La Liga
Seria A
Other
Favorite Show
Game of thrones
Breaking Bad
الزير سالم
Prison Break
Favorite Game
FIFA
Call of Duty
Fortnite
PUBG
