Mobile Crane Review Questions and Answers 100% Verified
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Mobile Crane Operator
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Mobile Crane Operator
Mobile Crane Review Questions and Answers 100% VerifiedMobile Crane Review Questions and Answers 100% VerifiedMobile Crane Review Questions and Answers 100% VerifiedMobile Crane Review Questions and Answers 100% Verified
What is the purpose of placing mats or cribbing under or cribbing under outri...
Mobile Crane Review Questions
and Answers 100% Verified
What is the purpose of placing mats or cribbing under or cribbing under outrigger
floats? - ANSWER - Distribute the force over a larger area.
Where is the best location for leveling a crane? - ANSWER - Upperworks. (A
revolving frame of equipment on which operating machinery are mounted along
operator's can)
Before leveling a mobile crane on outriggers, an operator should ensure: - ANSWER
- 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 should be considered? - ANSWER - Keeping a 90 degree angle between
cylinder rod and pad.
When may blocking (cribbing) be placed under outrigger beams on mobile cranes? -
ANSWER - Never approved.
Mobile cranes should be level to within what percent of grade? - ANSWER - 1 %
Timber crane mats work best when they are: - ANSWER - Bolted together
When arriving in the crane at the job site, the operator should first determine the
condition of the: - ANSWER - Access roads
What surface listed below would Not be a good location for assembly or setup of a
mobile crane? - ANSWER - A. Above compacted fill
B. Above highway asphalt
C. Above underground vaults
,D. Above highway concrete
it is important to know when lubricating crane hoist wire rope, that the lubricant
must:
a. not hinder visual inspection
b. not be applied in direct sunlight
c. not be applied prior to use
d. not be applied to regular lay wire rope - ANSWER - not hinder visual inspection
how often is the competent person required to inspect the running wire ropes on a
mobile wire?
a. each shift
b. each year
c. each week
d. each month - ANSWER - each shift
Each outrigger pad and its blocking should be sufficient to support? - ANSWER - The
total weight of the crane and its load.
How does high wind affect a mobile crane with a long boom? - ANSWER - Introduces
side load onto the boom
When is the only time the outrigger beams should be less than fully extended? -
ANSWER - The load chart indicates that this is allowed (always make sure that it is
safe first)
What is the primary purpose for a rooster sheave or auxiliary boom point sheave? -
ANSWER - separate the load hoist lines.
Eccentric main boom tip reeving causes which of the following: - ANSWER - twisting
of the main boom
, which type of wire rope listed below is installed on MOST cranes?
a. right regular lay
b. right alternate lay
c. left regular lay
d. left alternate lay - ANSWER - a. 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.
a. 1/2 inch
b. 1 inch
c. 1 1/2 inch
d. 2 inch - ANSWER - 1/2 inch
Which type of wire rope listed below is installed on most cranes?
a. main hoist line
b. boom hoist line
c. Auxiliary hoist line
d. pendant line - ANSWER - pendant line
when lifting on outriggers, the floats or pads should always be:
a. sufficient to support three times the applies load
b. raised to touch the tires firmly on the ground
c. secured to the outriggers cylinder
d. secured to the mats - ANSWER - secured to the outriggers cylinder
On a mobile crane, what is the weight of the stowed jib that is deducted in load
chart calculations called?
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