EICA Mobile Crane & Digger Derrick
Questions With Correct Answers|
Updated
If not overloaded, the ground bearing pressure of a single outrigger pad can
approach a weight equal to:
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
increase
On a crawler crane, ground bearing pressure is greatest when hoisting where?
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?
78 PSI
How much area would be required for 45,000 pounds to create only 20 PSI?
2,250 square inches
,Why use mats or cribbing?
To reduce ground bearing pressure
What is the purpose of placing blocking or pads under the outrigger floats?
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
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?
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?
20ft
When a crane is in transit and you are required to pass under 50kV power lines,
what is OSHA's minimum required clearance?
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?
1 ½ times the depth of the excavation
,When working at ground floor level near a cellar wall, the crane's outrigger pads
or tracks should be placed
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?
The controlling entity
What is not a good location for crane set up?
Above utilities
What is the best procedure to follow when underground utilities may be present?
Contact local utility company
While performing a shift inspection on a crane and there is water accumulation
around the outrigger, what must be done?
Drained
While operating a boom truck near a reinforced retaining wall, it is
recommended to stay back
A distance equal to the depth
, What would be a concern when setting up a crane over a sewer or water main?
Weight and vibration from the machine and load
When setting up a crane in an area that has public access, you should barricade:
the jobsite
When setting up a crane, what must be barricaded to protect workers?
The hazardous areas created by the rotating superstructure
According to OSHA, what area must be barricaded to prevent employees from
entering
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
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?
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
Questions With Correct Answers|
Updated
If not overloaded, the ground bearing pressure of a single outrigger pad can
approach a weight equal to:
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
increase
On a crawler crane, ground bearing pressure is greatest when hoisting where?
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?
78 PSI
How much area would be required for 45,000 pounds to create only 20 PSI?
2,250 square inches
,Why use mats or cribbing?
To reduce ground bearing pressure
What is the purpose of placing blocking or pads under the outrigger floats?
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
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?
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?
20ft
When a crane is in transit and you are required to pass under 50kV power lines,
what is OSHA's minimum required clearance?
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?
1 ½ times the depth of the excavation
,When working at ground floor level near a cellar wall, the crane's outrigger pads
or tracks should be placed
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?
The controlling entity
What is not a good location for crane set up?
Above utilities
What is the best procedure to follow when underground utilities may be present?
Contact local utility company
While performing a shift inspection on a crane and there is water accumulation
around the outrigger, what must be done?
Drained
While operating a boom truck near a reinforced retaining wall, it is
recommended to stay back
A distance equal to the depth
, What would be a concern when setting up a crane over a sewer or water main?
Weight and vibration from the machine and load
When setting up a crane in an area that has public access, you should barricade:
the jobsite
When setting up a crane, what must be barricaded to protect workers?
The hazardous areas created by the rotating superstructure
According to OSHA, what area must be barricaded to prevent employees from
entering
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
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?
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
