WorksheetsCESOR
Total questions: 107
Worksheet time: 27hrs 45mins
What is fitted to the base of the hot stick to prevent moisture?
Wooden stopper
Porcelain stopper
Stainless steel stopper
Hard rubber stopper
Before using the Megger, What step should be taken fist on the megger?
Check the condition of the carrying strap
Check calibration date of the megger.
Check the power cable connections
Check Megger name plate
What indication does a conservator bladder pressure gauge give under normal condition?
negative pressure is indicated
positive pressure is indicated.
Close to zero is indicated
Neutral pressure is indicated
How should an insulation test be conducted on a U/G feeder when grounded buggy is installed in the breaker cubical…..?
Get permission connect test leads remove grounds and test
· Remove grounds remove un required personal conduct test
Cancel all clearances remove ground connect test lead.
Not require
What is the purpose of buchholz relay on power transformer?
Indicate temp changer position & displays info on relay panel for protection
Monitor oil temperature & controls cooling fans and pumps for protection
Senses winding & oil temp and warns of excessive differential for protection
Monitor gas and oil from within transformer main tank for protection.
How does the clamp on ammeter work?
· Induce current to secondary which drives a graduated meters.
Measure voltage of conductor and gives a secondary reading
When clamping on conductor it shows voltage, current and resistance
· Split core meter measures resistance, convert to mili amps
What condition exists when a breaker raked into test position?
· It operated remotely to put it back to into normal services
· Neither connected or disconnected but can still supply load
· It allows current flow with plug box disconnected
· Can be operated for testing purposes when plug box is connected.
Who certifies the employee that meet Potential Testing certification requirement?
Independent examiner appointed by Superintendent.
Independent examiner appointed by safety advisor
· Independent examiner appointed by Loss Prevention
Independent examiner appointed by Department Manager
What rules are applied when operate plug-in type elbows?
Operate energize using hot stick and place cover on bushing
· Operate de-energize using hot stick and place cover on bushing.
Operate de-energize using scope stick and place cover on bushing
Operate energize using fuse stick and place cover on bushing
What electrical condition is used to activate the circuit in audible test?
Stored voltage supplied by equipment
Potential difference measured between two test contacts
Battery bank available between a probe and floating contact
Induced voltage while it is close to alive source.
What is measured by synchro scope meter?
Reactive volt amps
Phase differential.
Inductive volt amps
Not mentioned
When working alone and conditions become hazardous, what action should be ………..?
Delay switching
for a while
Investigate change in conditions
Request assistance.
Complete switching
What is classified as line fault?
Short circuit.
Close circuit
Low frequency
Circuit breaker
Who can perform switching operations on electrical distribution………..?
Employee certified by planning Forman
Any authorized & certified employee.
Technicians using non potential testers
Any employee in control of the system
What are the components of a hold order code?
Area code, a year and sequence number.
Area number, a year and suffix
Hold order number, year and area number
Hold order number, and area number and suffix
What scale is selected to measure current, when using……?
Middle range
Amps scale
Voltage scale
Lowest range
What abbreviation is used a switching program to signify lack
T
<< true
. What is purpose of disconnect switch?
To quickly connect a circuit
To quickly disconnect a circuit
To do energize a supply
To provide visible isolation
What is the voltage range for medium voltage system automatic transfer switch?
o 69KV to 115 KV
o 34KV to 69KV
o 5 KV to 15 KV
o Zero to 600 KV
0 to 600 KV
5 KV to 15 KV
34KV to 69KV
5KV to 30KV
Why does the ACB’s operating switch position show green when the breaker is in the closed position?
Breaker was closed remotely with selector switch in remote
Assembled in correctly while closed.
Breaker was operated locally when selector switch was on remote.
Selector switch not switched to remote after local operation
What is placed on the dispatching mimic board whenever a work permit is counter signed?
Hold tag
WP marker
WP number
Hold marker
When can a switching program start?
When the work crew arrives at the job site.
When switchman is available to issue a work permit.
When receiving instruction from the controlling operations \ dispatcher.
When it signed by the power service unite.
Where should the safety locks be installed during'' switching to isolate''?
At every open switch and remote fuse.
At every close switch and local fuse
At every isolation point under the Hold order.
How should pole top cutout fuses be stored when used as an isolation point?
Stored in the tool box locked with Hold tag on them
Stored them in the vehicle to avoid being used
Stored in safe place until job is completed
Stored securely to the pole with pull rings upward.
Who is responsible to ensure that new equipment drawings are correct and available?
Project management
POD engineering
Project engineering
Operation s.
When performing a megger test on a high voltage power cable, what should be done first?
Test cable for single core and three cores
Test cable for type and size
Test cable for continuity and infinity
Test cable by potential tester.
What type of the hot line tools is used to hold a noisy tester (A.B chance) while testing for Potential ?
Hook stick.
Clamp stick
. Who match notice (time) is required for routine switching when Isolation an SEC supplied?
48 hours.
36 hours
32. What abbreviation is used in switching program to signify a check?
Ck.
CEK
What scheme is used to switch load to an alternate source, where loss of power?
By-pass transfer
Automatic load transfer.
UPS
What is Isolation resistance measured in?
Ohms and Meg Ohms.
Amps and volts
Electronics and protons
Feet
How are energized 13.8 KV circuit tested on distribution switch, when it does not have the ***** ?
Remove T cap or cable termination and test at test point.
.
.
.
36. What is the minimum size of extra flexible copper conductor to ground?
3\0 AWG
4\0 AWG
2\0 AWG.
1\0 AWG
What is the turn’s ratio of a transformer, when a primary winding has 2100&secondary 700?
3:3
3:2
3:4
3:1.
Who is responsible for tagging and labeling new equipment?
Planning
Loss prevention
Operations
Engineering
. What does the term ''spike'' cable mean?
Test energized using audible tester
To short screen and conductor with a sharp tool.
To prove energized using capacitance tester
To provide energized by cable locator
. How often should a hot stick be tested and certified?
Every twelve months
Every nine
Every day
Tomorrow
What is indicated by the sample below?
Oil circuit breaker
Oil fuse cutout....
Vacuum circuit breaker
Automatic transfer switcher
. What is the function of an enunciator panel found in a substation ?
It identifies equipment on a diagram
It displays alarms and identifies source of the signed.
It is backup protection scheme to assist relays
It is like an alarm clock that operates at regular intervals
When there is not a solid ground connection to the metal enclosure electrical equipment?
Step \touch potential shocks to any one touching enclosure.
Enclosed equipment can operate at a higher potential
Describe the apparatus labeled D706 in receiving substation?
115 KV circuit switcher#6
230 KV disconnect switch#6.
380 KV bus #06 cc potential device
13.8 KV switch van#6 emergency exit
. What is insulating medium of the bus chamber of sf6 distribution switch?
Oil insulated
Air insulated
sf6 gas.
vacuum chamber
Where there is an (o/h )-( over head lines ) 13.8 v CP line conductor down in a remote area ,what action should do?
Restrict access ,call dispatcher, have line crew to de energize.
Request technician to check that line has tripped at source
Call dispatcher, patrol area to see area is safe
Cut conductor clear of the ground using cable cutter
. What the minimum time allowed to submit a scheduled outage request to SOU foreman?
Submitted 24 hours before switching .
Submitted 36 hours before switching
Submitted 12 hours before switching
Submitted 36 hours before switching
Where are lightning arresters fitted in a substation?
On station main transformer secondary
On station service transformer primary
On station main transformer primary...
On station test bench as spare
What changes, when the NLTC position is adjusted ?
Primary voltage is raised or lowered.
Primary voltage is raised changed
Turns ratio of trans former will change
.
Secondary voltage will be lowered
When discovering an error in a switching program, what action should be taken?
Stop switching take appropriate action with dispatcher..
Stop switching take appropriate action with POD unit
Stop switching take appropriate action with proponent
What is the proper way to store grounding and test devices when storing them in a substation ?
Ground cables left connected to bus side
Cover with dust cover and ground cable disconnected...
Ready for use with ground cable connected
Stored in the test position of a spare cubicle
52. When two or more conductors come in contact with each other, what will happen?
Open circuit
Short ground
Open ground
Short circuit.
What is indicated by the symbol below?
Neutral ground resistor
Motor start
Lightning arrester...
Arcing horns
Which specific personal protective equipment is required when working near poles in switch construction sites?
Gloves
Coverall
Face shield
Safety hat.
What additional protective clothing is required before switching equipment with live exposed parts?
Rubber gloves, safety shoes and visor or arc flash hood
Rubber gloves, with mechanical protectors and visoror arc flash hood
H.V gloves with mechanical protectors and face shield or arc flash hood.*******
56. After a splice has been completed, what should be done to the cable?
Test with a 5 KV meager..
Cable crew should restore the power
Work permit extend until power is restored
Cable should not be energized for long time
When cable testing in the primary compartment what should be done to secondary compartment?
Remove transformer door while testing
Keep secondary compartment close..
Ground any secondary circuits
Allow secondary voltage for testing
What is another name for an automatic transfer switch?
Isolation switch
Throw over switch...
Cross over switch
Disconnect switch
What type of potential test instrument detects voltage through insulation?
Phasing test set
Capacitance tester
Audible tester....
Voltage indicator
When switching to energize a circuit tripped by relay operation what should be done?
Perform complete inspection...
Double test for power factor
Do un planned maintenance
Re-energized without inspection
When two or more conductors come in contact with each other, what will happen?
Short circuit.
Open ground
What are the components of a “hold order code”?
Area number, a year and suffix
Hold number order number,year and area number
Hold order number, an area number and suffix
Area code , a year and sequence number....
. What does varmeter read?
Vars.
Farads
Ohms
Hertz
What hazard is present when opening a fuse cutout that required the use of fire resistant?
Electrical arcs...
Mechanical damage
X- rays
Electrical shock
What “clear work space “is required when working in a switch yard where 69 bus bar?
183 CM or 72 inches
183 CM or 72 inches
183 CM or 72 inches
183 CM or 72 inches
What is the duration of phase to ground test when testing the insulation of air circuit breaker?
1minutes..
500000000000000000000000000000000000000000000000000000000000000000000000000000000minutes
3000minutes
700 minutes
When trouble shooting faulty cable, what action should be taken first?
dis connect live side and attach ground
Perform potential test after dis connect at both ends...
Dis connect at one end and attach ground
Megger and attach personal ground
When there is a power supply failure to any part of the high voltage system, who should be notified first?
PDD manager
Area superintendent
Relevant dispatcher....
Area ESO foreman
Why is ‘potential test’ performed on high voltage equipment?
To determine test instrument working properly
To determine circuit by potential and frequency as its source
To determine conductor or equipment is energize/de- energize....
To determine circuit current capacity of conductor before adding load
When there is call ‘911’ that a transformer is on fire at receiving substation, what action should be taken?
Isolate burning transformer locally then get help
Stay outside ,put safety locks on gates until fire goes out
Facility should be de- energized before using any firefighting equipment(s)
...
Describe the system apparatus labeled A601on one line diagram?
69 KV gas circuit breaker number01
34.5 KV vacuum circuit breaker number01
115 KV oil/gas circuit breaker number01.....
230 KV oil/gas circuit breaker number01
Describe thesystem apparatus in substationlabeled B204?
480 V bus PT number04
Breaker 2.4 KV number04
Reactor 13.8 KV number04
ACB 4.16 KV number04...
. How can the rang of a 16 KV phasing tester for a 48 KV or 80 KV application be extended?
By decreasing the current range scale
By increasing the cable length
By increasing the voltage range scale
By attaching the extension resisters.... **
Who prepares the switching programs before energizing new equipment?
Operations ...
POD service unit
Project engineering
Project management
What the correct test voltage for a phase to ground insulation test on a 13.8 KV air circuit breaker?
500 voltages
1000voltages
5000voltages.
2500voltages
Where is the hold order code used to identify the isolation points of scheduled outage?
On hold tag at some visible isolation points...
in office
What is the purpose of multiple-clip or hasp?
Allow use of multiple locks &hold tags.
Allow safety locks to be easily removed by next shift
When any accident happen on the distribution or transmission systems, who should be notified first?
POD manager
Relevant operations/dispatcher
Area superintendent
What condition should be met before testing is permitted within clearance limits?
Tester is clearance holder and warns clearance holders
Dispatcher suspend clearances issued after test completed....
Tester is clearances holder to discuss with other holders
Clearances are suspend before permission is granted
What gas is commonly used in gas insulated circuit breakers?
(SF6)
Who is required to take the examination for potential test certification?
>>
Employees who perform potential test on job and be nominate by division..
<<
What instrument is used to measure and test electrical insulation resistance?
Phase tester
Megger..
Ohms meter
Ammeter
What the voltage range for a low voltage system automatic transfer switch?
34.5 KV to 69 KV
zero to 600 KV.
35Kv to 34.5 KV
5 KV to 15 KV
when called to investigate a U/G residential feeder trip, what action should be taken?
agree to isolate feeder with dispatcher to locate the fault...
rack out ACB and back the circuit from alternate source
when switching to recognize a circuit tripped by a relay operation what should be done?
Perform complete for inspection.
do unplanned maintenance
re-energize without inspection
After a splice has been completed what should be done to the cable?
Test with a 5 KV megger.,.,.,.
Test with a 50 KV megger
Test with a 999 KV megger
Test with a -500 KV megger
when there is not a solid ground connection to the metal enclosure of electric equipment what….
step/touch potential shocks to anybody touching enclosure....
<<
what is the function of an annunciator panel found in substation?.
>>
It displays alarms and identify source of the signal.
<<
what is the minimum time allow to submit a scheduled outage request to the SOU foreman?
Submitted 24 hours before switching..
Submitted 36 hours before switching
Submitted 12 hours before switching
what is the proper way to store grounding and test devices when storing them in substation?
.
Cover with dust cover and ground cable disconnected..
.
.
When two or more conductors comes in contact with each other what will happen
.
SHORT CIRCUIT
.
.
when discovering an error in a switching program what action should be taken?
.
Stop switching take appropriate action with dispatcher.
.
.
what is the minimum size of extra flexible copper conductor required to ground a s…..?
2/0 AWG.
,
,
,
How are energized 13.8KV circuit tested on a distribution switch when it does not have …..?
>
Use a TIC-TAC or noisy tester to test at u/g cables.
<
-
101- what is insulation resistance measured in ?
Amps and voltage
heat
cold
what does the term “unscreened” conductor mean?
.
Stranded conductor with on insulation.
.
.
104-what should be done to the phases that are not faulted while testing?
.
Bond healthy phases to the ground.
.
.
What is the voltage range for low voltage system automatic transfer switch?
.
Zero to 600 KV
.
.
What is the voltage range for medium voltage system automatic transfer switch?
0
5 KV to 15 KV
0
0
What Happens when an OLTC on power transformer changes tap?
0
Turns ratio is changed.
0
0
How are employees trained on the job to perform “hazardous duties”?
0
Under direct supervision of a job certified employee.*
0
0
When a relay trips what is reported to the dispatcher?
0
Target and serial number.
0
0
Describe the system apparatus in a substation labeled B204?
0
ACB 4.16 KV number 04
0
0
How is an ACB’s closing mechanism charged when the normal control power is not available?
0
There is a manual charging handle in tool kit for this purpose.
0
0
what determines the direction of the tap changer adjustment when the voltage is low?
0
0
Tap change information found on the transformer name plate.
0
What is the preferred grounding point to ground an isolated bus and tested bus with portable grounds?
0
S/S ground grid.
0
0
What indication does a conservator bladder pressure gauge give under normal conditions?
21
Positive pressure is indicated. *
5
1
What important step should be taken after every megger test by the E.S.O?
0
Discharge megger.
0
0
What is the purpose of a multiple-clip or hasp?
0
Allows use of multiple locks & hold tags
0
Where are hazardous conditions recorded by the operations/dispatcher?
0
Operations log book.
0
0
