Hazard Identification and Control Flashcards
7 cards from real CTSP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Hazard Identification and Control flashcards as text
When assessing a tree for work, which condition most strongly indicates the presence of internal decay?
Answer: Fungal conks or brackets growing on the bark
Fungal conks or brackets (fruiting bodies) on the bark are reliable external indicators of significant internal wood decay.
A crew member notices a large dead branch overhead before beginning chainsaw work. The FIRST action should be to:
Answer: Remove or avoid the hazard before starting work
Identified overhead hazards must be controlled or avoided before any work begins to prevent struck-by injuries.
Which type of cut is most likely to create a reaction wood hazard that causes unexpected stem movement?
Answer: A top cut on a leaning stem under compression
Cutting a leaning stem under compression can release stored energy suddenly, causing the wood to kick back or spring unpredictably.
According to ANSI Z133, the minimum safe approach distance from an energized conductor rated 50–200 kV for an unqualified worker is:
Answer: 15 feet
ANSI Z133 requires unqualified workers to maintain a minimum 15-foot distance from conductors rated 50–200 kV.
A tree's root plate is partially lifted on one side. This condition most directly indicates a hazard of:
Answer: Whole-tree failure by uprooting
A lifted root plate signals that anchoring roots have already failed on one side, significantly increasing the risk of whole-tree uprooting.
When conducting a pre-work site assessment, which utility hazard requires notifying the utility owner before beginning work?
Answer: Any overhead or underground electric utility near the work
ANSI Z133 and most jurisdictions require notifying the electric utility before performing tree work near electrical conductors.
A co-dominant stem union with included bark is hazardous primarily because:
Answer: The embedded bark prevents wood fibers from interlocking, weakening the union
Included bark between co-dominant stems prevents the formation of interlocking wood fibers, creating a weak union prone to splitting.