Quiz Flashcards
How do most forklifts consider center of gravity?
24” out on forks x 24” high.
What could happen if load center is outside of center of gravity?
Capacity of machine decreases
Machine could tip over
When is the machine most likely going to tip over?
When the CG moves over or beyond the front axle
When the boom moves up and forward what does the CG do?
Moves with it, once CG is beyond front axle tip over is likely
Out riggers (stabilizers)
Extend length of machine in turn extend CG
If load is heavier than Load Capacity Chart what should you do?
- Move machine closer to load
- Break down load into smaller loads
- Use a larder machine that can handle the load
A forklifts balance is affected by what two conditions?
And describe the 2 conditions
Static (sitting)
Dynamic (moving)
Static (balance) conditions include?
Load size
Load shape
Position of load on forks
Lift height
Amount of tilt
Tire pressure
Dynamic conditions include?
Acceleration
Speed
Braking
Ramps and slopes
Raising load
Lowering load
When is tipover likely in this picture?
When CG over lower wheel
Describe picture
As load is raised the CG of the load exceeds the line from the CG of the machine to the lower stability point
What to do/not do while lifting suspended loads
- NEVER suspend loads from forks using chains, ropes, straps etc
- always use a JIB
- need to be done per manufacturers recommendation or qualified person
What are factors in stability?
Slope of operation points
Strength of soil
Before leaving operators position:
- put forklift in neutral
- apply parking brake
- fully lower forks
Types of Required inspections
Visual inspections
Daily log sheet for duration of machines life
Written and signed record of all inspections
Operator ____ have this on his persons
“Shall”
Hoisting license
Drivers license
Who can give emergency signal
Anyone
Number of signalers
One
On loads 5% & more, load should be _____.
Upgrade
Empty forks should be ________.
Downgrade
Back up hill so weight (engine) is in front
Complete engage load with forks at least ____ under the load.
2/3
Number one cause of death involving cranes
Electrocution
Required clearance for 50 kV
10 feet
Required clearance for 51-200 kV
15 feet
Required clearance for 201-350kV
20 feet
If contact made with power lines
- should remain in machine until utility company comes
- no one should approach machine for rescue
- if operator needs to leave, stand up without touching anything, jump while landing on both feet and shuffle away from machine
A forklift is ______ when the operator is less than 25 feet from the truck which remains in his view.
Attended