Transformation
What type of a core is most commonly used in a distribution transformer?
Shell Type
When determining conductor weight, the safety factor for spans 250 ft or greater is.
1.5
When making hand contact with underground primary conductor :
An equipotential zone must be created
How many cycles will an electronic recloser take to trip open when the Hot Line tag is in the on position:
4-6 cycles
What is the maximum voltage the class 0 gloves are rated for?
1000 V
What causes ferroresonance?
No secondary load on transformer bank during switching.
Three phase transformer installation with a primary connection other than grounded wye.
Energizing by means of single pole switches.
Two important pieces of information that must be attached to every live line tool test decal are:
Date, Test facility
When remotely grounding a cable for work:
Positive cable identification must take place after grounding the cable
What is the rating of a solid blade in a cutout:
300A
The test interval for rubber gloves is:
6 months
A transformer that is manufactured to alter customer voltage in 5% intervals has what installed?
Tap changer
The Design Factor for rigging components used to support personnel is:
10:1.
What must you do after a grounding elbow has been used, before it can be used again?
Inspect for damage, clean and lube.
Operating Order 2T-27 governs Distribution feeder switching using disconnect switches.
TRUE
Before opening a conductor, what percentage of the load must the bypass jumper be carrying?
30%
The secondary windings of a 120/240V transformer are put in series and the transformer is 96% efficient, what is the secondary voltage?
120 / 240 V
As per WorkSafe BC, OSH Regulation Part 34, the only rope construction that is approved for rescue purposes is:
Static Kernmantel
How do a cable fault indicator operate:
A magnetic field produced by a fault passes through the fault indicator enabling it to operate
What should be done to a voltage regulator before parallel switching (same source) outside the substation?
Set to NCO
When completing a rubber glove job, in general how is coverup removed?
First on, last off
One transformer on a delta-delta bank is burned out and the bank is hooked up open delta-open delta. What is the capacity of the 2 remaining transformers?
86.6% of remaining 2
The intent of the equipotential zone is to establish a low ________ path, parallel to the workers.
Impedance
A PLT is testing a cable using a Hastings Phase Tel with Hi Pot adapter. The meter indicates line to ground voltage and maintains that reading. What does this indicate?
The cable has a bolted fault
What two ratings are shown on an S&C Load Buster tool?
600A nominal/ 900A maximum
What is the grace period on rubber protective equipment?
No grace period