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Mobile Crane Review Questions & Correct Answers
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Mobile Crane Review Questions & Correct Answers
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Mobile Crane Operator Core Review QuestionsDistribute over a larger area. Correct Ans - What is the purpose of
placing mats or cribbing under outrigger floats?
Upperworks. Correct Ans - Where is the best location for leveling a
crane?
there is no weight of the crane bearing on any tires Correct Ans -
Before leveling a mobile crane on outriggers, an operator should ensure:
Operating a mobile crane with a long boom, on uneven ground, what
support condition should be considered? Correct Ans - Keeping a
90° angle between cylinder rod and pad.
Operating a mobile crane with a long boom, on uneven ground, what
support condition should be considered? Correct Ans - Keeping 90°
angle between cylinder rod and pad.
When may blocking (cribbing) be placed under outrigger beams on mobile
cranes? Correct Ans - Never approved.
Mobile cranes should be level to within what percent of grade? Correct
Ans - 1%
Timber crane mats work best when they are: Correct Ans - bolted
together.
,When arriving in the crane at the job site, the operator should first
determine the condition of the: Correct Ans - access roads.
What surface listed below would NOT be a good location for assembly or
setup of a mobile crane? Correct Ans - Above underground vaults.
Each outrigger pad and its blocking should be sufficient to support?
Correct Ans - The total weight of the crane and its load.
How does high wind affect a mobile crane with a long boom? Correct
Ans - Introduces side load onto the boom
When is the only time the outrigger beams should be less than fully
extended? Correct Ans - The load chart indicates that this is
allowed.
What is the primary purpose for a rooster sheave or auxiliary boom point
sheave? Correct Ans - Separate the load hoist lines.
Eccentric main boom tip reeving causes which of the following: Correct
Ans - twisting of the main boom.
Which type of wire rope listed below is installed on most cranes?
Correct Ans - Right regular lay.
, The hoist drum flange shall extend a minimum of _______ over the top layer
of wire rope at all times while crane is in operation. Correct Ans -
1/2 inch.
Which of the following is classified as a standing wire rope? Correct
Ans - Pendant line.
When lifting on outriggers, the floats or pads should always be: Correct
Ans - secured to the outriggers cylinder.
How many randomly broken wires in a lay length must there be on a
mobile cranes hoist line, before it should be removed from service?
Correct Ans - 6
What is the minimum design factor required for a right regular lay, boom or
hoist wire rope? Correct Ans - 3.5
On a mobile crane, how many broken wires are permitted at the end
connection of a pendant before it must be taken out of service? Correct
Ans - 1
Type 1 rotation resistant hoist wire rope has a design factor of: Correct
Ans - 5 to 1
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