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Line Clearance Arboriculture > General Knowledge > Flashcards

General Knowledge Flashcards

1
Q

When rigging the safety zone should be at least ???

A

Equal in radius to the height of the tree

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2
Q

Barberchair

A

Potentially dangerous condition whereby a limb or treee under pressure splits while being cut

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3
Q

What does the downward hinge allows you to do ?

A

Allows the branch to fall slowly , brush end first

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4
Q

Whats the general rule to reach for a victim??

A

Use the safest , fastest method available to get to a victim.

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5
Q

How its included bark created ???

A

Where 2 branches compete for the same space . Forming a “ V “ crotch

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6
Q

Electricity tends to run through the body via ?

A

Blood vessels , bones and nerves rather than over the surface of the skin

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7
Q

The faster a tree grows …

A

The more porous and less dense its the wood. Density of wood is a leading factor in how easily a tree will break

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8
Q

T/F One and one -third kilowatts is equal to about one horsepower

A

True

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9
Q

T/f A delta circuit does not have a voltage difference between phase wires

A

True

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10
Q

T/F the climbing rope shall not be used for rigging

A

True

Use other work ropes to lower limbs and handle chainsaws over 15 pounds

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11
Q

What type of rope should be use to rescue a victim??

A

Clean and dry extra 1/2 rope

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12
Q

The carbon created on a limb makes the tree?

A

More conductive than it was before

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13
Q

100 milliamperes can cause

A

The heart to go into fibrillilation

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14
Q

1 way to avoid barberchair is ?

A

To secure the trunk with a log chain and wedges or a pole binder similar to a ratchet strap on a heavy duty dolly.

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15
Q

The MAD are based on ?

A

The maximum potential operating voltage phase to phase in the energized conductors

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16
Q

When the trees are excurrent like pines rigging should start ?

A

From bottom and work up

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17
Q

Whats inside a tree?

A

Bark- phloem- cambium - xylem and heartwood

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18
Q

Rigging on decurrent trees may start?

A

From the top and work down

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19
Q

When its the upward hinge useful?

A

When pulling overhangs in line clearance

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20
Q

Dropping a limb on two phase wires will??

A

Cause a flash , a loud noise and an interruption to electric service

21
Q

All line clearance tree pruning can de divided into the following five general types

A 
Row
Top
Side
Under
Overhang
22
Q

T/F grass its a non-woody plant

A

True

The meristem is located just below the soil level

23
Q

When the stem bark ridge turns upward …

A

The stems have a strong union

24
Q

First task on any removal job ??

A

Inspection of the job site and job briefing for the entire crew

25
Q

After how many minutes the brain damages starts to occur??

A

When the brain its without oxygen after 4 minutes .. rescuers should try to rescue the victims in 4 mins if possible

26
Q

Reclosers in descending order from substation to single phase line

A

100 amps from substation to 3 phase line largest number of customers .

100 amps 3 phase line - second largest number of customers.

50 amps single phase line - third highest number of customers

25 amps single phase cutouts or reclosers are the smaller number of electric customers

27
Q

A switch that functions like a circuit breaker protecting circuits from fault conditions

A

Recloser

28
Q

To break the contact between a victim and energized conductor what should you do ??

A

Use a non-conductive or insulated tool

29
Q

One ampere is equal to

A

1000 milliamperes

30
Q

When deciduous tree branches have sprouts growing into utility lines what should you do ??

A

Remove the entire branch and not just the tips

31
Q

What are the dielectric testing requierements for pole pruners??

A

50,000 volts for 1 minute per foot on wood poles

75,000 volts for 1 minute per foot on fiberglass poles

32
Q

Dr alex shigo in 1983 develop a revolutionary theory for ??

A

Identifying a process by which trees respond to wounding CODIT

33
Q

When the stem bark ridge turns inward (arrows going down) …

A

Th stems have a weak union , climbers should be careful tree eventually fail

34
Q

T/F its OSHA a federal law ??

A

True

35
Q

Copper and aluminum have ??

A

Low resistance and are good conductors

36
Q

A qualified line clearance arborist can work up to ?

A

2’ 4” with a maximum potential operating voltage of 1.1 to 15.0 kv phase to phase

37
Q

Arborist climbing line should be what size when new ??

A

Shall have a minimum diameter of 1/2” and be constructed of synthetic fiber with a minimum nominal breaking strength of 5,400 pounds when new

38
Q

What does a hinge cut does ?

A

The branch in hinged up and away from the electric conductor using a fall crotch and a pulley in the tree , a hinge cut is made on the opposite direction where the arborist wants the limb to swing

39
Q

T/F The fatality of a worker in 1968 was the impetus behind the development of the original standard

A

True

40
Q

Whats the first rule in pruning?

A

No cutting without a reason

41
Q

0.05 to 1.0 at an elevation of 5000 feet sea elevation

A

Avoid direct or indirect contact

42
Q

T/F crotch the climbing rope around the main leader rather than on a lateral branch

A

True

43
Q

Most common kind of non-lethal harm suffered by electric shock ???

A

Neurological problems

44
Q

T/F trees grow by stem elongation?

A

True

Tree branches always add new growth beginning where the old growth stopped.

45
Q

Whats the most conductive part of a live tree ??

A

Sapwood (xylem)

46
Q

Type 2 climbing saddles

A

Must have drop forged support D rings

47
Q

Appropiate rope size for block size

A

Sheave diameter ———rope diameter

4”                          ——— 1/2”
5”                          ——— 5/8
6”                          ———3/4
7”                          ———-7/8
8”                          ———- 1”
48
Q

T/F silver maples grow faster than sugar maples

A

True

49
Q

Should a a tree thats its leaning heavily due to ice or snow should be removed with normal notch and backcut??

A

No . There is unusual pressure on the trunk of the trees and barberchair could occur

Line Clearance Arboriculture (1 decks)

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