ISA EXAMINATION SCRIPT 2026
COMPLETE QUESTIONS WITH FULL
SOLUTIONS
◉ To prune trees that flower on previous years growth and max
flowering, you should prune:.
Answer: Shortly after flowering.
◉ When pruning a branch from a tree, the final cut should be:.
Answer: Just outside the branch collar.
◉ When it comes to pruning, as a rule, mature trees:.
Answer: Not tolerant of severe pruning
◉ If the height of the tree needs to be reduced..
Answer: Branches should be removed at their point of origin or to a
lateral large enough to assume.
◉ Advantage of Amon-eye system over eye bolt:.
Answer: Length of rod can be adjusted
, ◉ Purpose of a lightning protection system:.
Answer: Conduct the electrical charge into the soil away from the
tree.
◉ If two bracing rods are installed to support a weak Union, they
should be placed:.
Answer: Staggered, and no closer together than the diameter of the
trunk.
◉ If a lag hook is installed into decayed wood,.
Answer: Holding power will be reduced, decay may be detected
when drilling, decay will spread along the lag
◉ When cabling a multi stemmed tree, extra support can be added
by:.
Answer: Cabling the limbs together in triangular combinations.
◉ A condition with a cluster of dwarfed shoots on affected twigs:.
Answer: Witch's broom
◉ Twig dieback from periodical cicadas is primarily a result of:.
Answer: Ovipositing, egg-laying
COMPLETE QUESTIONS WITH FULL
SOLUTIONS
◉ To prune trees that flower on previous years growth and max
flowering, you should prune:.
Answer: Shortly after flowering.
◉ When pruning a branch from a tree, the final cut should be:.
Answer: Just outside the branch collar.
◉ When it comes to pruning, as a rule, mature trees:.
Answer: Not tolerant of severe pruning
◉ If the height of the tree needs to be reduced..
Answer: Branches should be removed at their point of origin or to a
lateral large enough to assume.
◉ Advantage of Amon-eye system over eye bolt:.
Answer: Length of rod can be adjusted
, ◉ Purpose of a lightning protection system:.
Answer: Conduct the electrical charge into the soil away from the
tree.
◉ If two bracing rods are installed to support a weak Union, they
should be placed:.
Answer: Staggered, and no closer together than the diameter of the
trunk.
◉ If a lag hook is installed into decayed wood,.
Answer: Holding power will be reduced, decay may be detected
when drilling, decay will spread along the lag
◉ When cabling a multi stemmed tree, extra support can be added
by:.
Answer: Cabling the limbs together in triangular combinations.
◉ A condition with a cluster of dwarfed shoots on affected twigs:.
Answer: Witch's broom
◉ Twig dieback from periodical cicadas is primarily a result of:.
Answer: Ovipositing, egg-laying
