Exam Flashcards
Rule of thumb formula for WLL of wire rope?
Diameter squared x 8
Function of a snatch block?
Change direction of pull
How to choose a proper anchor point?
Approved structurally sound for all imposed forces
Minimum safe lifting angle in Ontario?
45 degrees
How is the limit of approach distance specified?
With or without a single person (1 boom length)
What is the critical sling angle that doubles the sling load?
30 degrees
If it was still legal, what are the rope specifications for a lanyard?
5/8ths diameter nylon rope
What knot is used to join ropes of equal diameter?
Reef knot
Which sling configuration is used to avoid load slipping?
Double wrapped choker or basket
What is the height from the ground that requires fall arrest restraint or barriers?
10ft
What is the becket clip on a rope block assembly?
On the travelling block (upside down in picture example)
Most important maintenance procedure for wire rope?
Lubrication
When using Crosby clips to make an eye, how does it affect the wire rope load capacity?
Decrease by 20%
How to calculate the minimum sheave diameter for wire rope?
20x wire rope diameter
How do you repair a damaged hook, sling or shackle?
Destroy it
Basic ladder safety rules are?
All of the above (secure top and bottom etc.)
How is WLL for a hoisting sling determined?
Read the tag
When fibre ropes are spliced with a knot how do you calculate the WLL?
Working load limit for the weaker line, minus 50% for the knot
Which is a hazardous application of lang lay rope?
A lifting sling when the load can rotate
Calculate the minimum sheave diameter for fibre rope?
Rope diameter x8
What is a disadvantage of a back splice on a fibre rope?
Takes too long to weave
Wire rope made of smaller individual wires but same diameter is..?
More flexible, resists fatigue
What is the required size for extra padding under the stabilizer legs?
Must be 3x the foot area
What is the principal of boom angle on crane stability?
Lower boom/lower stability
