EICA MOBILE CRANE & LATEST
DIGGER DERRICK EXAM
List the 3 common hitches from strongest to weakest?
Basket, vertical, choker
When using a screw pin shackle to attach 2 slings to a crane's hook,
the
Pin goes on the hook
Screw pin shackles are sized by the diameter of the
Bow
Most overhead rigging is designed with a minimum safety factor of
5 to 1
When using cable or nylon spreaders, it is important to remember
what about the angle and tension?
The lower the spreader angle, the greater the tension
When using 6x19 IWRC sling in a basket configuration, the
recommended minimum D/d is
25 to 1
A spreader bar is regularly used to
Spread attaching points
A spreader bar that weighs over 100 lbs must have what
information on the spreader bar?
END OF
PAGE
1
, EICA MOBILE CRANE & LATEST
DIGGER DERRICK EXAM
Weight
What is the maximum included angle when using a shackle to attach
multiple slings?
120°
When attaching more than 1 sling to a hook, it is not recommended
to have more included angle than
90°
At what degree of horizontal sling angle does the tension in each leg
of a 2-leg bridle equal the weight of the load?
30°
When handling pipe, what hitch would give you 360° of contact with
the pipe
Double wrapped hitch
What makes the best softeners for handling loads with sharp edges
when using synthetic slings?
Pipe cut horizontally
When using synthetic slings, what would be the greatest concern
when rigging a load?
Sharp corners
END OF
PAGE
2
, EICA MOBILE CRANE & LATEST
DIGGER DERRICK EXAM
When operating a crawler crane, what is the most unstable
allowable quadrant of operation?
Side
When operating a truck crane, what is the most unstable allowable
quadrant of operation?
Front
What quadrant produces the least amount of ground bearing
pressure on a crawler?
Side
R/T cranes usually have a greater capacity over which working
area?
Front
Crawler cranes usually have greater capacity over which working
area?
Ends
Most truck mounted cranes usually have a greater capacity over
which operating area?
Rear
Some truck mounted cranes have no lifting capacity over which
operating area?
END OF
PAGE
3
, EICA MOBILE CRANE & LATEST
DIGGER DERRICK EXAM
Front
If a boom truck is set up on outriggers with no front stabilizer, the
working area is usually limited to what working area?
180°
What information will a working area diagram chart give the
operator?
Quadrants of operation
When doing a pick and carry operation with a R/T crane, most
manufacturers require the load and boom to be position
Over the front
A boom truck crane with a 120 ft boom will be operating at a 42 ft
radius. The load chart shows an entry indicating 25,000 lb at a 40 ft
radius, followed immediately by an entry listing 20,000 lb at a 45 ft
radius. What is the crane's capacity at the 42 ft radius?
20,000 lb
A truck crane operating with outriggers fully extended and set, and
does not have a fifth front outrigger, the operator should
Refer to the manufacturer's working area diagram
When a boom truck crane is operating on properly set outriggers,
the tipping axis is located at the
Point where the outriggers touch the ground
END OF
PAGE
4
DIGGER DERRICK EXAM
List the 3 common hitches from strongest to weakest?
Basket, vertical, choker
When using a screw pin shackle to attach 2 slings to a crane's hook,
the
Pin goes on the hook
Screw pin shackles are sized by the diameter of the
Bow
Most overhead rigging is designed with a minimum safety factor of
5 to 1
When using cable or nylon spreaders, it is important to remember
what about the angle and tension?
The lower the spreader angle, the greater the tension
When using 6x19 IWRC sling in a basket configuration, the
recommended minimum D/d is
25 to 1
A spreader bar is regularly used to
Spread attaching points
A spreader bar that weighs over 100 lbs must have what
information on the spreader bar?
END OF
PAGE
1
, EICA MOBILE CRANE & LATEST
DIGGER DERRICK EXAM
Weight
What is the maximum included angle when using a shackle to attach
multiple slings?
120°
When attaching more than 1 sling to a hook, it is not recommended
to have more included angle than
90°
At what degree of horizontal sling angle does the tension in each leg
of a 2-leg bridle equal the weight of the load?
30°
When handling pipe, what hitch would give you 360° of contact with
the pipe
Double wrapped hitch
What makes the best softeners for handling loads with sharp edges
when using synthetic slings?
Pipe cut horizontally
When using synthetic slings, what would be the greatest concern
when rigging a load?
Sharp corners
END OF
PAGE
2
, EICA MOBILE CRANE & LATEST
DIGGER DERRICK EXAM
When operating a crawler crane, what is the most unstable
allowable quadrant of operation?
Side
When operating a truck crane, what is the most unstable allowable
quadrant of operation?
Front
What quadrant produces the least amount of ground bearing
pressure on a crawler?
Side
R/T cranes usually have a greater capacity over which working
area?
Front
Crawler cranes usually have greater capacity over which working
area?
Ends
Most truck mounted cranes usually have a greater capacity over
which operating area?
Rear
Some truck mounted cranes have no lifting capacity over which
operating area?
END OF
PAGE
3
, EICA MOBILE CRANE & LATEST
DIGGER DERRICK EXAM
Front
If a boom truck is set up on outriggers with no front stabilizer, the
working area is usually limited to what working area?
180°
What information will a working area diagram chart give the
operator?
Quadrants of operation
When doing a pick and carry operation with a R/T crane, most
manufacturers require the load and boom to be position
Over the front
A boom truck crane with a 120 ft boom will be operating at a 42 ft
radius. The load chart shows an entry indicating 25,000 lb at a 40 ft
radius, followed immediately by an entry listing 20,000 lb at a 45 ft
radius. What is the crane's capacity at the 42 ft radius?
20,000 lb
A truck crane operating with outriggers fully extended and set, and
does not have a fifth front outrigger, the operator should
Refer to the manufacturer's working area diagram
When a boom truck crane is operating on properly set outriggers,
the tipping axis is located at the
Point where the outriggers touch the ground
END OF
PAGE
4
