Mobile Crane Operator Core Review
Comprehensive Resource To Help You Ace 2026-2027 Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
What is the purpose of placing mats or cribbing under outrigger floats? Distribute over a larger area.
Where is the best location for leveling a crane? Upperworks.
Before leveling a mobile crane on outriggers, an operator should ensure: there is no weight of the crane bearing on any tires
Operating a mobile crane with a long boom, on uneven ground, what support condition
Keeping a 90° angle between cylinder rod and pad.
should be considered?
Operating a mobile crane with a long boom, on uneven ground, what support condition
Keeping 90° angle between cylinder rod and pad.
should be considered?
Never approved. When may blocking (cribbing) be placed under outrigger beams on mobile cranes?
1% Mobile cranes should be level to within what percent of grade?
bolted together. Timber crane mats work best when they are:
When arriving in the crane at the job site, the operator should first determine the condition
Access roads
of the:
What surface listed below would NOT be a good location for assembly or setup of a mobile
Above underground vaults.
crane?
The total weight of the crane and its load. Each outrigger pad and its blocking should be suflcient to support?
Introduces side load onto the boom How does high wind attect a mobile crane with a long boom?
When is the only time the outrigger beams should be less than fully
The load chart indicates that this is allowed.
extended?
Separate the load hoist lines. What is the primary purpose for a rooster sheave or auxiliary boom point sheave?
twisting of the main boom. Eccentric main boom tip reeving causes which of the following:
Right regular lay. Which type of wire rope listed below is installed on most cranes?
The hoist drum flange shall extend a minimum of over the top layer of wire rope at
1/2 inch.
all times while crane is in operation.
Pendant line. Which of the following is classified as a standing wire rope?
secured to the outriggers cylinder. When lifting on outriggers, the floats or pads should always be:
How many randomly broken wires in a lay length must there be on a mobile cranes hoist line,
6
before it should be removed from service?
3.5 What is the minimum design factor required for a right regular lay, boom or hoist wire rope?
On a mobile crane, how many broken wires are permitted at the end
1
connection of a pendant before it must be taken out of service?
5 to 1 Type 1 rotation resistant hoist wire rope has a design factor of:
not hinder visual inspection. It is important to know when lubricating crane hoist wire rope, that the lubricant must:
How often is the competent person required to inspect the running wire ropes on a mobile
Each shift.
crane?
On mobile cranes, how many broken wires must be present in one strand of one lay for
3
running wire rope to be removed from service?
How many randomly distributed broken wires in rotation-resistant hoist wire rope are con-
2 broken wires in 6 rope diameters.
sidered for replacement?
According to OSHA, what is the minimum number of full wraps of wire rope that must remain
2
on hoist drums in all service conditions?
1/9
, Mobile Crane Operator Core Review
Comprehensive Resource To Help You Ace 2026-2027 Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
On whose recommendations should a mobile crane preventative
Crane manufacturer.
maintenance program be developed?
On a mobile crane, the measurement for the load radius is the distance from the center of
center of rotation of the crane.
gravity of the suspended load to the:
Yes. On a mobile crane, should the load be applied when determining the proper boom angle?
On a mobile cranes range diagram, boom length and boom angle
Load radius.
can be used to determine?
On a mobile crane, what is the weight of the stowed jib that is deducted in load chart
Ettective weight.
calculations called?
use the range diagram. When determining boom tip elevation for a mobile crane, the user could:
Gross capacity minus capacity deductions. The term net capacity is best defined by which of the terms listed below?
When lifting ott the main boom, how is the ettective weight of the fly/jib ditterent in the erected
Ettective weight increases.
position from that of the stowed position?
Mobile cranes that are setup on barges, shall have a list chart provided by which of the entities
Manufacturer.
listed below?
75%. When lifting loads on tires, mobile cranes are rated at what percentage of tipping?
How does the ettective weight of a stowed extension relate to the actual weight of the
Lower than the actual weight.
extension?
longer radius. When load radius is between radii values, the operator must use the:
Side loading forces may occur. Why do most crane manufacturers reduce load capacity for duty-cycle operations?
Why should only approved attachments or extra counterweights provided by the manufacturer
They could cause a backward stability problem.
be placed on the rear of crane?
A mobile crane's jib is ottset 15° versus its original 0° ottset, but the boom angle remains
increases.
unchanged. In this situation, the load radius:
What is the ditterence between an anti-two-block warning device and an anti-two-block
Warning device only warns, but prevention devices will stop the functions.
prevention device?
Actual measurements. How can the LMI's boom length or load radius reading be verified?
Angle of boom to horizontal. On mobile cranes, what does the boom angle indicator show the operator?
What is the device called that automatically stops the boom when it nears the cranes maximum
Boom hoist limiting.
angle?
allowable line pull decreases. When the number of layers of wire rope on a drum increases the:
Starting or stopping the swing too rapidly. On a mobile crane, side loading of the boom could be caused by which of the following?
Lift Director Which person listed below, has the responsibility for determining the correct weight of a load?
What must an operator do when an operator leaves the controls of the crane for an extended
Apply all brakes and dogs, and lower the load to the ground.
period of time?
Collapsing the boom. Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major ettect?
When the rotation of the load would be dangerous. When should a tag line be used, during the hoisting of material?
What percentage of the rated capacity of a mobile crane must be used when lifting with two
75%
cranes attached to the same load?
keep the hoist lines of both cranes vertical. When lifting a load with two mobile cranes, it is very important to:
2/9
Comprehensive Resource To Help You Ace 2026-2027 Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
What is the purpose of placing mats or cribbing under outrigger floats? Distribute over a larger area.
Where is the best location for leveling a crane? Upperworks.
Before leveling a mobile crane on outriggers, an operator should ensure: there is no weight of the crane bearing on any tires
Operating a mobile crane with a long boom, on uneven ground, what support condition
Keeping a 90° angle between cylinder rod and pad.
should be considered?
Operating a mobile crane with a long boom, on uneven ground, what support condition
Keeping 90° angle between cylinder rod and pad.
should be considered?
Never approved. When may blocking (cribbing) be placed under outrigger beams on mobile cranes?
1% Mobile cranes should be level to within what percent of grade?
bolted together. Timber crane mats work best when they are:
When arriving in the crane at the job site, the operator should first determine the condition
Access roads
of the:
What surface listed below would NOT be a good location for assembly or setup of a mobile
Above underground vaults.
crane?
The total weight of the crane and its load. Each outrigger pad and its blocking should be suflcient to support?
Introduces side load onto the boom How does high wind attect a mobile crane with a long boom?
When is the only time the outrigger beams should be less than fully
The load chart indicates that this is allowed.
extended?
Separate the load hoist lines. What is the primary purpose for a rooster sheave or auxiliary boom point sheave?
twisting of the main boom. Eccentric main boom tip reeving causes which of the following:
Right regular lay. Which type of wire rope listed below is installed on most cranes?
The hoist drum flange shall extend a minimum of over the top layer of wire rope at
1/2 inch.
all times while crane is in operation.
Pendant line. Which of the following is classified as a standing wire rope?
secured to the outriggers cylinder. When lifting on outriggers, the floats or pads should always be:
How many randomly broken wires in a lay length must there be on a mobile cranes hoist line,
6
before it should be removed from service?
3.5 What is the minimum design factor required for a right regular lay, boom or hoist wire rope?
On a mobile crane, how many broken wires are permitted at the end
1
connection of a pendant before it must be taken out of service?
5 to 1 Type 1 rotation resistant hoist wire rope has a design factor of:
not hinder visual inspection. It is important to know when lubricating crane hoist wire rope, that the lubricant must:
How often is the competent person required to inspect the running wire ropes on a mobile
Each shift.
crane?
On mobile cranes, how many broken wires must be present in one strand of one lay for
3
running wire rope to be removed from service?
How many randomly distributed broken wires in rotation-resistant hoist wire rope are con-
2 broken wires in 6 rope diameters.
sidered for replacement?
According to OSHA, what is the minimum number of full wraps of wire rope that must remain
2
on hoist drums in all service conditions?
1/9
, Mobile Crane Operator Core Review
Comprehensive Resource To Help You Ace 2026-2027 Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
On whose recommendations should a mobile crane preventative
Crane manufacturer.
maintenance program be developed?
On a mobile crane, the measurement for the load radius is the distance from the center of
center of rotation of the crane.
gravity of the suspended load to the:
Yes. On a mobile crane, should the load be applied when determining the proper boom angle?
On a mobile cranes range diagram, boom length and boom angle
Load radius.
can be used to determine?
On a mobile crane, what is the weight of the stowed jib that is deducted in load chart
Ettective weight.
calculations called?
use the range diagram. When determining boom tip elevation for a mobile crane, the user could:
Gross capacity minus capacity deductions. The term net capacity is best defined by which of the terms listed below?
When lifting ott the main boom, how is the ettective weight of the fly/jib ditterent in the erected
Ettective weight increases.
position from that of the stowed position?
Mobile cranes that are setup on barges, shall have a list chart provided by which of the entities
Manufacturer.
listed below?
75%. When lifting loads on tires, mobile cranes are rated at what percentage of tipping?
How does the ettective weight of a stowed extension relate to the actual weight of the
Lower than the actual weight.
extension?
longer radius. When load radius is between radii values, the operator must use the:
Side loading forces may occur. Why do most crane manufacturers reduce load capacity for duty-cycle operations?
Why should only approved attachments or extra counterweights provided by the manufacturer
They could cause a backward stability problem.
be placed on the rear of crane?
A mobile crane's jib is ottset 15° versus its original 0° ottset, but the boom angle remains
increases.
unchanged. In this situation, the load radius:
What is the ditterence between an anti-two-block warning device and an anti-two-block
Warning device only warns, but prevention devices will stop the functions.
prevention device?
Actual measurements. How can the LMI's boom length or load radius reading be verified?
Angle of boom to horizontal. On mobile cranes, what does the boom angle indicator show the operator?
What is the device called that automatically stops the boom when it nears the cranes maximum
Boom hoist limiting.
angle?
allowable line pull decreases. When the number of layers of wire rope on a drum increases the:
Starting or stopping the swing too rapidly. On a mobile crane, side loading of the boom could be caused by which of the following?
Lift Director Which person listed below, has the responsibility for determining the correct weight of a load?
What must an operator do when an operator leaves the controls of the crane for an extended
Apply all brakes and dogs, and lower the load to the ground.
period of time?
Collapsing the boom. Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major ettect?
When the rotation of the load would be dangerous. When should a tag line be used, during the hoisting of material?
What percentage of the rated capacity of a mobile crane must be used when lifting with two
75%
cranes attached to the same load?
keep the hoist lines of both cranes vertical. When lifting a load with two mobile cranes, it is very important to:
2/9
