General Knowledge Flashcards
Where does the compass point??
Magnetic north
Trees with the potential to affect the operation of utilities in the future ???
Utility forest
Topping is also known as ?
Roundover or hat rack
Trees produce more sprouts when??
Larger branches are pruned back to smaller branches
Subordination is used …
Selectively in specific branches to improve structure
Risk to utility facilities can be mitigated by?
Decreasing the load on decayed Branch unions
The majority of electric pruning takes place on?
Distribution lines which generally have voltages ranging from 3 to 35 kv
Unlike other trees palms ..
Have no means of closing such wounds and are monocots
The practice of pollarding requires??
Annual removal of all sprout growth
T/F
Aluminium poles are never used
True
Dielectric testing for pole pruners
50,000 volts for 1 minute per foot on wood poles
75000 volts for 1 minute per foot on fiberglass poles
What do you do if you knock down any utility wires??
Report immediately to the utility company and do not touch any wire
What kind of hard hats do you need for utility work??
Class E they resist up to 35 pounds impact
T/F
Climbing rope should be use for riigging??
False
Climbing rope its only to support the climber and to raise or lower tools less than 15 pounds
Its climbing line a safety rope ?
Yes it should never be crotched around the limb being removed
Wheres the best part of the tree to crotch the climbing line ??
Around the main leader rather than a lateral branch
How much does an average chainsaw weights with a 12” blade??
10 pounds or less
The upward hinge its always useful in line clearance when??
Pulling overhangs
The maximum wire sag and sway occurs where??
At the center of span . Span is pole to pole
Secondary or service wires can easily be maintained with ??
A pole pruner usually operated from the ground
What do you do if the trees are below the wires ??? Or in the middle
Call utility center
Aerial devices tools should be clean with ??
Non-film cleaning agent
You must maintain lifts by using ??
Non-conductive hydraulic oil
The DC. Pump on the aerial lift its intended to do what?
For emergency lowering use only, do not run it for over 3 years continuously
Whats the most conductive layer of the tree ??
Sapwood ( water / xylem. )
The PPE its listed where on a chemical container??
The precautionary statements
What to do if a tip of a branch its touching lines ??
Use insulated or non-conductive tools , they posses a high relatively resistanceto the flow ofelectricity
What tools to use if the branch its touching a conductor ??
Wooden or fiberglass pole pruner
Dropping a limb on two phase wires will cause?
A flash , a loud noise and in interruption to electric service
Trees that become pinned by another larger tree??
Springpoles
How to release springpoles?
Make a series of kerf cuts
Whats the distance of the safety zone when removing a tree??
At least equal in radius to the heigh of the tree
Tree growth regulators works best on what kind of trees?
Decurrent trees ,,, not so much on excurrent trees like pines
On excurrent trees work may start ?
From the bottom to the top
On decurrent trees work can start ?
From the top and work your way down
Climbing lines should be at least?
A minimum diameter of
1/2
Synthetic fiber
Minimum breaking strenght of 5400 pounds
Is OSHA a federal law ?
Yes
Disadvantages to use a rear tractor brush hog ?
Rocks flying everywhere
Reclosers are to protect what??
The distribution lines
The MAD minimum approach distance is bases on ?
Maximum potential operating voltage phase to phase
0.05 to 1.0 kv
Avoid contact direct or indirect
1.1 kv to 15kv
2.4 feet minimum approach distance for qualified clearance arborist
Fire extinguisher pass
Pull aim squeeze sweep
Copper and aluminum has ?
Low resistance and are good conductors
Cut outs or fuses protect?
Customer appliances and utilities hardware
GIS
Geographic Information System
Electric wires on a primary distribution circuit are
Sub-station to 3 phase wire 100amp First large number of customers
3 phase to 3 phase 100 amp second largest number of customers
Phases are called depending on the utility
A B OR C
X Y OR Z
ROAD - MIDDLE - FIELD
Whats the function of the wire thats wrapped around the triplex wire ?
Is acting as neutral or ground which acts as carrier or messenger
Whats does a loop (snowshoes) do??
To store spare fiber
The loop allow the wire to uncoil or stretch rather than break
We are not tree trimmers
We are utility arborist
We dont trim trees
We prune trees
The generator at the power plant rotates at?
3600 rpm equals 60 cycles times 60 seconds
Fire extiguisher PASS
Pull-Aim-Squeeze- Sweep
Switches
Help manage the electrical network
Manually operated
NOT designed for line protection
A disadvantage of substation circuiits
When one blows it takes down a whole section of transmission
Everytime a recloser opens its called
A permanent operation or lockout
T/F
Cutouts are fuses to operate above 600 V
True
How many bushings does a voltage regulator have normally?
Usually have 3 bushings and a gauge
What does a capacitator fo ?
Hold and slowly release voltage
