Exam (elaborations)
NWSA TT1
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Exam of 4 pages for the course NWSA TT1 at NWSA TT1 (NWSA TT1)
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NWSA TT1 QUESTIONS AND ANSWERSGRADED A+
v What is the minimum force that a positioning system anchorage must be able to withstand? - 2 times
the MAF(Maximum anticipated force) or 3,000 lbs
If a synthetic rope has a breaking strength of 6,600 lbs and a bowline knot is tied to make a lifting eye
what is the maximum gross load that can be lifted? - 660 lbs. Synthetic rope has a safety factor of 10:1.
That includes the weakening factor of the knot
Exposure to ionizing radiation dopes what to the human body? - IR can change cells and molecules in
biological organisms
When is a trained signal person necessary - When a crane can physically enter a powerline restricted
area.
What three ways can a capstan hoist be powered - Electric Gas and Hydraulic
When using tape and butyl to weatherproof a ground kit what is a critical step in the process? - Always
cut the tape with sciccors
According to regulations, what is the maximum arresting force allowed to the human body? - Maximum
arresting force allowed on the body is 1800 lbs. But our y-landyards reduce the force to half that
What is the minimum number of ground kits installed in a single run - 3. (1 at the top above the hoisting
grip. 1 at the base of the tower on the vertical run, 1 at the cabinet)
how often must a fire extinguisher be inspected by a qualified person? - Annually
What is a crown block? - Upper sheave assembly attached to the tower. Sheave assembly = pulley or
block
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