ISA Certified Tree Worker Aerial Lift Specialist

Which consensus standard specifically addresses safety requirements for arboricultural operations, including work near electrical conductors?

• AANSI A300
• BANSI Z133
• CANSI A92.2
• DOSHA 1910.269

Under ANSI Z133, what is the minimum approach distance an arborist who is NOT a qualified line-clearance arborist must maintain from an energized conductor rated up to 50 kV?

• A3 feet
• B6 feet
• C10 feet
• D15 feet

What is the FIRST action an operator must perform before using an aerial lift each day?

• ADrive to the worksite and begin pruning
• BConduct a daily pre-operation inspection of the device and controls
• CFill the hydraulic reservoir with fresh oil
• DRemove the boom-rest restraints only

When operating from an aerial lift bucket, what fall-protection equipment does ANSI Z133 require the operator to use?

• AA body belt with a 12-foot lanyard
• BA full-body harness with a lanyard attached to the manufacturer's designated anchor point
• CNo fall protection is required inside an enclosed bucket
• DA rope grab attached to the climbing line

Before raising the boom, what ground condition must the operator verify to keep an aerial lift stable?

• AThat the surface is firm, level, and capable of supporting the device and outriggers
• BThat the ground is moist to improve traction
• CThat the truck is parked on a slope facing downhill
• DThat at least one outrigger remains retracted for mobility

What is the primary purpose of testing the lower (ground) controls and the upper (platform) controls before an operator enters the bucket?

• ATo warm up the hydraulic fluid for faster boom speed
• BTo confirm both control stations function and that a ground person can lower the operator…
• CTo satisfy the load chart requirement
• DTo recharge the device's battery

Which type of pruning cut removes a branch back to the branch collar without leaving a stub?

• AHeading cut
• BFlush cut
• CReduction cut
• DRemoval (thinning) cut

Why should an arborist avoid making a flush cut when removing a branch?

• AIt leaves a long stub that decays
• BIt removes the branch collar, enlarging the wound and impairing the tree's ability to com…
• CIt is faster but uses too much chain oil
• DIt promotes excessive water sprout growth at the cut

When removing a heavy limb, why is the three-cut method (undercut, top cut, then final cut) used?

• ATo make the cut faster with a smaller saw
• BTo prevent the bark from tearing down the trunk as the limb falls
• CTo leave a longer stub for later removal
• DTo sharpen the chain during the cut

Topping a tree is considered an unacceptable practice primarily because it:

• APermanently dwarfs the tree with no regrowth
• BCreates large wounds, stimulates weakly attached sprouts, and increases future hazard
• CImproves the tree's structural strength
• DIs the recommended method for hazard reduction

"Lion's tailing" is an improper pruning practice that involves:

• ARemoving too many interior and lower branches, leaving foliage only at branch ends
• BCutting all branches back to the trunk
• CRemoving the central leader
• DLeaving water sprouts along the entire stem

When felling a tree, what is the purpose of the notch (face cut)?

• ATo weaken the stump so it rots faster
• BTo guide the direction in which the tree falls
• CTo remove bark before the back cut
• DTo replace the need for a hinge

During tree felling, the strip of uncut wood left between the notch and the back cut is called the:

• AKerf
• BHinge (holding wood)
• CGullet
• DSapwood band

What is the recommended escape route angle relative to the planned direction of tree fall?

• ADirectly opposite (180 degrees) to the fall
• BAbout 45 degrees back and away from the direction of fall
• CStraight toward the direction of fall
• DExactly 90 degrees to the side

In rigging, the "working load limit" (WLL) of a rope or component is:

• AThe same as its minimum breaking strength
• BThe maximum load it should carry in service, well below its breaking strength
• CThe load at which it always fails
• DOnly relevant for steel cable, not arborist rope

Which knot is commonly used to attach a rigging line to a limb being lowered, forming a secure, adjustable loop?

• AClove hitch
• BRunning bowline
• CSquare knot
• DOverhand knot

What is the function of a lowering (friction) device, such as a port-a-wrap or friction brake, in tree rigging?

• ATo increase the falling speed of the limb
• BTo add controllable friction so a ground worker can manage and slow the descent of rigged…
• CTo replace the need for a rigging block
• DTo measure the weight of the limb in pounds

Which part of a tree is primarily responsible for transporting water and minerals upward from the roots?

• APhloem
• BXylem
• CCambium
• DBark

The presence of conks (fruiting bodies of fungi) on a tree's trunk most likely indicates:

• AHealthy, vigorous growth
• BInternal wood decay that may reduce structural strength
• CRecent fertilization
• DNormal seasonal leaf drop

Coniferous trees are best described as those that generally:

• ADrop all leaves each fall and produce flowers
• BBear cones and usually have needle-like or scale-like evergreen leaves
• CHave broad leaves and produce acorns
• DAre always shorter than deciduous trees

In scientific (binomial) nomenclature, a tree's name such as Quercus rubra consists of:

• AFamily and order
• BGenus and species
• CCultivar and variety
• DCommon name and region

Which PPE item is specifically required when operating a chain saw to protect the legs from chain contact?

• ASteel-toe sandals
• BCut-resistant chaps or chain saw protective leg wear
• CStandard cotton work pants
• DKnee pads only

Why must arborists working in or around an aerial lift wear head protection meeting the appropriate ANSI/ISEA Z89.1 class?

• ATo improve radio reception
• BTo protect against impact and, with the correct electrical class, reduce electric-shock h…
• COnly to keep the sun off the face
• DBecause it is optional but recommended

What does "indirect contact" with an energized conductor mean for an aerial lift operator?

• ATouching the wire directly with a bare hand
• BContact made through a conductive object such as a tree limb, tool, or the boom touching…
• CStanding within 100 feet of any power line
• DWorking only during daylight hours

If the aerial lift boom or bucket accidentally contacts an energized power line, the operator should:

• AImmediately climb down the boom to the ground
• BStay in the bucket, avoid touching other surfaces, and try to break contact with the cont…
• CReach out and push the line away by hand
• DStep out of the bucket onto the truck frame

Before working from an aerial lift near electrical conductors, who is authorized to verify whether a line is de-energized and grounded?

• AAny crew member with a voltage tester
• BThe utility (or a qualified person designated by the utility) responsible for the line
• CThe customer who owns the property
• DNo verification is needed if gloves are worn

Which weather condition would most clearly require an arborist to stop aerial lift operations?

• ALight overcast with calm air
• BAn approaching lightning storm or high winds
• CMild temperatures around 70 degrees F
• DSlightly damp grass from morning dew

What is the maximum number of workers normally permitted in a single-person aerial lift bucket while operating?

• AAs many as can fit
• BOne, unless the device is rated and designed for additional occupants
• CAlways two for safety
• DThree if all wear harnesses

Why should an aerial lift operator avoid "belting off" (climbing out of the bucket and tying into the tree) unless trained and permitted to do so?

• AIt is always faster to stay in the bucket
• BLeaving the rated platform introduces fall and positioning hazards that require separate…
• CThe bucket controls stop working when empty
• DIt voids the truck's registration

An aerial lift load chart or rated capacity tells the operator:

• AThe maximum weight (operator plus tools and material) the platform can safely carry
• BThe fuel capacity of the truck
• CThe recommended tire pressure
• DThe number of hydraulic hoses installed

What is a key advantage of using an aerial lift instead of climbing to perform tree work?

• AIt eliminates the need for any fall protection
• BIt can reduce climber fatigue and provide a stable platform for the operator to position…
• CIt removes all electrical hazards
• DIt allows working in any wind speed

What is the correct response if an aerial lift's hydraulic system shows a leak or the boom drifts during the pre-operation inspection?

• AUse the lift for the day and report it tomorrow
• BRemove the device from service (tag out) until it is repaired and re-inspected
• CAdd more hydraulic fluid and ignore the drift
• DOperate it only at low height

When should the wheel chocks be placed during aerial lift setup?

• AAfter the boom is fully extended
• BWhen the truck is parked and before raising the boom, especially on any grade
• COnly when parked overnight
• DChocks are never used with outriggers

What is the main reason a work-zone traffic control plan (cones, signs, flaggers) is set up around an aerial lift operation on or near a roadway?

• ATo reserve parking for the crew
• BTo protect workers and the public by directing traffic away from the operation and drop z…
• CTo mark the property line
• DTo indicate the lunch area

ANSI Z133 requires that arborists maintain communication with ground workers. Why is a clear drop zone and signaling especially important during aerial lift work?

• ATo allow the operator to nap between cuts
• BTo ensure no one is beneath falling limbs and to coordinate lowering and movement safely
• CTo save fuel
• DBecause radios are prohibited

Which document must be available to the operator and provides the specific operating limits, controls, and emergency procedures for a particular aerial device?

• AThe vehicle's parking permit
• BThe manufacturer's operating manual for that device
• CThe customer's invoice
• DA generic OSHA poster

The branch bark ridge and branch collar are important pruning landmarks because they:

• AShow where to make a flush cut
• BMark the boundary where a proper removal cut should be made just outside the collar
• CIndicate the tree is diseased
• DAre only found on conifers

Crown thinning is best defined as:

• ACutting the top off the tree
• BSelectively removing branches to reduce density while retaining the natural form
• CRemoving all lower branches to raise the crown
• DCutting branches back to stubs

Why should pruning tools be disinfected when working on trees affected by certain diseases (e.g., fireblight)?

• ATo make the blades shinier
• BTo prevent transmitting pathogens from infected to healthy tissue or trees
• CTo lubricate the pivot
• DIt is never necessary

Modern arboriculture generally recommends that, for most pruning wounds, an arborist should:

• AApply a thick coat of tar-based wound dressing
• BMake a proper cut and leave the wound to close naturally without dressing in most cases
• CCover every cut with paint
• DWrap each cut in plastic

When felling, the back cut is generally made:

• ABelow the notch on the same side
• BOn the opposite side from the notch and slightly above the notch's horizontal cut
• CExactly at the bottom of the notch
• DAll the way through to the notch, removing the hinge

What is the function of a felling wedge during tree removal?

• ATo sharpen the chain
• BTo lift the tree in the desired direction and keep the saw kerf from pinching the bar
• CTo measure trunk diameter
• DTo replace the notch

What is "bucking" in tree removal operations?

• ARemoving the bark from a log
• BCutting a felled trunk or limbs into shorter lengths
• CClimbing the tree without a rope
• DSharpening the saw chain

When bucking a log that is supported at both ends, where do compression and tension forces typically occur?

• ACompression on top, tension on the bottom
• BCompression on the bottom, tension on top
• CTension only, no compression
• DForces are equal everywhere

A carabiner used in tree rigging or fall protection should be:

• AAny hardware-store snap hook
• BA rated locking connector appropriate for the load, used along its major axis
• CLoaded across the gate (minor axis) for strength
• DLeft unlocked for quick access

What is the main risk of "shock loading" a rigging system?

• AIt has no effect on the rope
• BThe sudden dynamic force can far exceed the static weight and overload or break the riggi…
• CIt only matters for steel cable
• DIt reduces friction at the lowering device

Why must arborist rigging rope be inspected before each use?

• ATo check its color matches the harness
• BTo detect cuts, glazing, abrasion, or other damage that reduces strength before it fails…
• COnly manufacturers can inspect rope
• DInspection is required only once a year