Free Arborist Exam Questions That Helps Candidates Pass

OSHA/ANSI Z133 require a 10-foot minimum clearance for lines up to 50 kV. Violating this is the leading cause of fatal accidents. ISA exams highlight electrical safety heavily.

Transpiration is the loss of water vapor from leaves, driving water movement through xylem and cooling the plant. Photosynthesis makes sugars, respiration releases energy, and translocation moves sugars in phloem. Arborists must understand transpiration to diagnose drought stress and plan irrigation schedules.

A reduction cut shortens a branch to a lateral at least one-third its size, maintaining structure and reducing decay risk. Heading and topping are improper cuts, while stubs interfere with closure. ISA’s pruning domain emphasizes proper reduction techniques as alternatives to topping.

Tree protection fencing at or beyond the dripline prevents compaction and root injury, while trunk wrapping or fertilization does little for root protection. ISA includes fencing as a gold-standard BMP in tree preservation.

Best practice is to cut away burlap, wire, and ties from the top and sides of the root ball, while leaving the bottom portion to maintain stability during placement. Leaving them intact can girdle roots. ISA exam objectives stress proper transplant handling to ensure establishment.