1|Page
EICA MOBILE CRANE & DIGGER DERRICK EXAM
QUESTIONS AND ANSWERS | 100% VERIFIED AND WELL
DETAILED ANSWERS | LATEST UPDATE 2026/2027
(GRADED A+)
If not overloaded, the ground bearing pressure of a single outrigger pad
can approach a weight equal to: ......ANSWER......85% of the weight of
the crane and 100% of the suspended load
If you move a crawler crane from soft ground to harder ground, ground
bearing pressure will ......ANSWER......increase
On a crawler crane, ground bearing pressure is greatest when hoisting
where? ......ANSWER......over the corner
If an outrigger pad has 45,000 pounds applied to it and the pad
measures 2ft x 2ft how many psi is it applying to the ground?
......ANSWER......78 PSI
How much area would be required for 45,000 pounds to create only 20
PSI? ......ANSWER......2,250 square inches
Why use mats or cribbing? ......ANSWER......To reduce ground bearing
pressure
pg. 1
,2|Page
What is the purpose of placing blocking or pads under the outrigger
floats? ......ANSWER......Distribute the force over a larger area
While swinging a heavy load with a crane set up on outriggers and the
operator swings over one of the outriggers, that outrigger must be able
to support ......ANSWER......85% of the weight of the crane and 100% of
the weight of the load
What is the first thing an operator should do before traveling under a
low pipe rack or obstruction? ......ANSWER......post a signalperson to
check clearances
According to OSHA, when traveling under an energized power line,
what is the minimum distance for a line with over 750kv?
......ANSWER......20ft
When a crane is in transit and you are required to pass under 50kV
power lines, what is OSHA's minimum required clearance?
......ANSWER......6 ft (Table T)
If setting up the crane by a ditch or an excavation, you should stay at
least what distance from the edge? ......ANSWER......1 ½ times the
depth of the excavation
pg. 2
,3|Page
When working at ground floor level near a cellar wall, the crane's
outrigger pads or tracks should be placed ......ANSWER......at least as far
back as the depth of the wall below ground
According to OSHA who is responsible for ensuring proper ground
conditions when setting up a mobile crane? ......ANSWER......The
controlling entity
What is not a good location for crane set up? ......ANSWER......Above
utilities
What is the best procedure to follow when underground utilities may
be present? ......ANSWER......Contact local utility company
While performing a shift inspection on a crane and there is water
accumulation around the outrigger, what must be done?
......ANSWER......Drained
While operating a boom truck near a reinforced retaining wall, it is
recommended to stay back ......ANSWER......A distance equal to the
depth
What would be a concern when setting up a crane over a sewer or
water main? ......ANSWER......Weight and vibration from the machine
and load
pg. 3
, 4|Page
When setting up a crane in an area that has public access, you should
barricade: ......ANSWER......the jobsite
When setting up a crane, what must be barricaded to protect workers?
......ANSWER......The hazardous areas created by the rotating
superstructure
According to OSHA, what area must be barricaded to prevent
employees from entering ......ANSWER......accessible areas within the
swing radius of the rear of the rotating superstructure of the crane
The best way to keep people from being injured from the
counterweight of the crane is to ......ANSWER......Fence or barricade the
swing area of the crane
When operating a crane in a tight space, what would be the
recommended minimum clearance for the rear swing of the crane?
......ANSWER......2 ft
The load line of the crane you're operating comes into contact with an
energized power line. There's no sign of any other danger, such as fire.
In such a situation, you should ......ANSWER......stay in the cab until the
lines are de-energized
pg. 4
EICA MOBILE CRANE & DIGGER DERRICK EXAM
QUESTIONS AND ANSWERS | 100% VERIFIED AND WELL
DETAILED ANSWERS | LATEST UPDATE 2026/2027
(GRADED A+)
If not overloaded, the ground bearing pressure of a single outrigger pad
can approach a weight equal to: ......ANSWER......85% of the weight of
the crane and 100% of the suspended load
If you move a crawler crane from soft ground to harder ground, ground
bearing pressure will ......ANSWER......increase
On a crawler crane, ground bearing pressure is greatest when hoisting
where? ......ANSWER......over the corner
If an outrigger pad has 45,000 pounds applied to it and the pad
measures 2ft x 2ft how many psi is it applying to the ground?
......ANSWER......78 PSI
How much area would be required for 45,000 pounds to create only 20
PSI? ......ANSWER......2,250 square inches
Why use mats or cribbing? ......ANSWER......To reduce ground bearing
pressure
pg. 1
,2|Page
What is the purpose of placing blocking or pads under the outrigger
floats? ......ANSWER......Distribute the force over a larger area
While swinging a heavy load with a crane set up on outriggers and the
operator swings over one of the outriggers, that outrigger must be able
to support ......ANSWER......85% of the weight of the crane and 100% of
the weight of the load
What is the first thing an operator should do before traveling under a
low pipe rack or obstruction? ......ANSWER......post a signalperson to
check clearances
According to OSHA, when traveling under an energized power line,
what is the minimum distance for a line with over 750kv?
......ANSWER......20ft
When a crane is in transit and you are required to pass under 50kV
power lines, what is OSHA's minimum required clearance?
......ANSWER......6 ft (Table T)
If setting up the crane by a ditch or an excavation, you should stay at
least what distance from the edge? ......ANSWER......1 ½ times the
depth of the excavation
pg. 2
,3|Page
When working at ground floor level near a cellar wall, the crane's
outrigger pads or tracks should be placed ......ANSWER......at least as far
back as the depth of the wall below ground
According to OSHA who is responsible for ensuring proper ground
conditions when setting up a mobile crane? ......ANSWER......The
controlling entity
What is not a good location for crane set up? ......ANSWER......Above
utilities
What is the best procedure to follow when underground utilities may
be present? ......ANSWER......Contact local utility company
While performing a shift inspection on a crane and there is water
accumulation around the outrigger, what must be done?
......ANSWER......Drained
While operating a boom truck near a reinforced retaining wall, it is
recommended to stay back ......ANSWER......A distance equal to the
depth
What would be a concern when setting up a crane over a sewer or
water main? ......ANSWER......Weight and vibration from the machine
and load
pg. 3
, 4|Page
When setting up a crane in an area that has public access, you should
barricade: ......ANSWER......the jobsite
When setting up a crane, what must be barricaded to protect workers?
......ANSWER......The hazardous areas created by the rotating
superstructure
According to OSHA, what area must be barricaded to prevent
employees from entering ......ANSWER......accessible areas within the
swing radius of the rear of the rotating superstructure of the crane
The best way to keep people from being injured from the
counterweight of the crane is to ......ANSWER......Fence or barricade the
swing area of the crane
When operating a crane in a tight space, what would be the
recommended minimum clearance for the rear swing of the crane?
......ANSWER......2 ft
The load line of the crane you're operating comes into contact with an
energized power line. There's no sign of any other danger, such as fire.
In such a situation, you should ......ANSWER......stay in the cab until the
lines are de-energized
pg. 4
