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WorksheetsETC 604 - TROUBLESHOOTING
Total questions: 40
Worksheet time: 21mins
Electrical troubleshooting should be carried out with a logical, step-by-step
approach which starts with…………………..
testing
preparation
asking
observation
The ___________who have written the work order you received, may have additional information that can help you in troubleshooting the fault.
supervisor
manager
operator
It is always a good practice to look over the situation visually before doing any physical testing.
TRUE
FALSE
From the circuit shown below, LOCAL CONTROL STATION is # ………..
1
2
3
4
From the circuit shown below, the OVERLOAD RELAY contact is # __________
1
2
3
4
The …………………… change position when the starter is closed, it is used to seal-in circuit around the momentary start switch.
thermal overload relay
auxiliary starter contacts
transformer
circuit breaker
In Saudi Arabia, the single-phase low voltage has a value of (a) Volts.
In Saudi Arabia, the three-phase low voltage has a value of (a) Volts.
Set your Millimeter to …………….. to check the continuity of the fuses and other parts of the circuit.
ohms
volts
amps
hertz
Thermal overload contacts are normally closed and open only in the event of an overload.
TRUE
FALSE
Identify the part indicated by number 3.
EARTH
NEUTRAL
LINE 1
LINE 2
Identify the part indicated by number 4.
EARTH
NEUTRAL
LINE 1
LINE 2
Identify the part indicated by number 10
EARTH
NEUTRAL
OUTLET
LINE 2
Identify the part indicated by number 7.
EARTH
NEUTRAL
OUTLET
SWITCH
Identify this testing instrument.
multimeter
ammeter
megger
Identify this device.
1-pole circuit breaker
3-pole circuit breaker
megger
Identify this device.
1-pole circuit breaker
3-pole circuit breaker
megger
In the continuity testing, the multimeter ___________.
WILL produce sound.
WILL NOT produce sound.
In the continuity testing, the multimeter ___________.
WILL produce sound.
WILL NOT produce sound.
What is the resistance reading of the material tested in the picture?
Zero
infinity or OL.
Which of the following is NOT part of troubleshooting an electric motor.
know the color
investigate symptoms
Which indicates the degree at which the motor can run in an overload condition
service factor
power factor
Which of the following indicates the maximum temperature at which the motor can run safely.
ambient temperature
code letter
Which of the following motor is colled only by radiation, convection, and an external fan?
totally enclosed
water cooled
To check insulation resistance, we need __________.
megger
ammeter
When the running motor shuts down and fails to start after, check the voltage at the __________ terminals.
circuit breaker
motor enclosure
It may be necessary to check the __________ for continuity.
start switch
capacitor
Troubleshooting insulation relies on accurate measurement of _______ traces.
heat
wave
An increase of ____F may reduce the motor life and stability of insulation up to 50%.
50
100
Which of the following can be used to check open circuit for motor windings?
ohmmeter
voltmeter
Which of the following cant be found in more nameplate?
voltage
service class
coil resistance
A motor that is rated continuous duty can run _____ hours a day.
24
12
8
4
The efficiency of the motor is the _______ over input watts.
output watts
output volts
The RED pushbutton has a contact that is normally ______.
close
open
The GREEN pushbutton has a contact that is normally ______.
close
open
The terminal number for normally close contact of OVERLOAD RELAY is _______.
95 and 96
97 and 98
The LOAD side number of magnetic contactor has numbers __________.
L1, L2 and L3.
T1, T2 and T3
The normally open auxilliary contact of magnetic contactor has terminal numbers _________.
13 and 14
21 and 22
The normally close auxilliary contact of magnetic contactor has terminal numbers _________.
13 and 14
21 and 22
The circuit breaker has both short circuit and overcurrent protection.
TRUE
FALSE
