Stihl Risk Management & Mitigation 4

Question 1

What does a Job Hazard Analysis (JHA) accomplish before chainsaw work begins?

Accepted Answer

It breaks the task into steps, identifies hazards at each step, and assigns controls

Answer

A JHA systematically maps hazards to each task step so controls are assigned before work starts.

Question 2

A tree hangs up in another tree during felling. Which action correctly mitigates the risk?

Accepted Answer

Treat it as a critical hazard, secure the area, and bring it down with mechanical assistance such as a winch

Answer

A hung tree can release without warning, so it must be brought down mechanically while workers stay clear; climbing it or felling the support tree is prohibited.

Question 3

Which factor is MOST important when sizing the felling notch to control risk during directional felling?

Accepted Answer

The notch should be about one-fifth to one-quarter of the trunk diameter with a proper opening angle to guide the fall

Answer

A notch of roughly 1/5 to 1/4 trunk diameter with an adequate opening angle lets the hinge steer the tree safely to the ground.

Question 4

What is the risk-management purpose of the hinge (holding wood) left between the notch and the back cut?

Accepted Answer

It controls the direction and speed of the fall like a door hinge

Answer

The uncut hinge wood guides the tree along its intended lay and prevents it from twisting or falling prematurely.

Question 5

An operator develops white, numb fingers after long shifts of chainsaw use. Which mitigation strategy addresses this vibration-related risk?

Accepted Answer

Limiting daily exposure time, using saws with anti-vibration systems, and keeping hands warm

Answer

Hand-arm vibration syndrome is mitigated by anti-vibration equipment, exposure limits, breaks, and warm dry hands.

(Stihl) Stihl Certification Practice Test

(Stihl) Stihl Certification Practice Test

Stihl Risk Management & Mitigation 4