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
A forklift is ______ when the operator is 25 feet or more from the truck, or is out of view of the truck.
Unattended
When elevating personnel, the combined weight of the platform, personnel, and material shall not exceed?
1/3 the rated lift capacity
As a boom is extended, the pressure ______ on the soil under the front wheels
Increase
When estimating weight never exceed what percent of load zone
50%
Formula for load weight
Volume x unit weight
Unit weight =
Density of material
The operator feathers controls when he wants to?
Move the load slowly
If another vehicle is stopped in your path what should you do?
Stop and sound your horn
The pivot point of a fork lift is the _____.
Front axle
When a forktruck lifts a
load up what happens?
The CG moves forward
*Forward tipping will occur unless the forklifts CG is?
On opposite side of front axle
*Momentum is the force created by?
Starting
Stopping
Turning
Authorized person
Person approved or assigned by employer to perform specific type of duties at job site.
Competent person
Capable of identifying existing predictable hazards or hazardous working conditions dangerous to employees.
Designated person
Same as authorized person
Number two cause of forklift accidents
Struck by lift truck
Where are hoisting laws found in code book?
Chapter 146
Section 53-57
Hoisting rules & regulation code
Section 53A
Section to carry a license while operating —> can be digital copy
Section 54
Section of code for violations
Section 54A
Section : Prevention of entry on premises code
Section 55
Section : Examiners; admin of oath to applicants code
Section 56
