MOBILE CRANE REVIEW QUESTIONS AND CORRECT ANSWERS LATEST 2024 A+ SCORE
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Course
NCCCO
Institution
NCCCO
MOBILE CRANE REVIEW QUESTIONS AND CORRECT ANSWERS LATEST 2024 A+ SCORE
Question 1
What is the purpose of placing mats or cribbing under or cribbing under outrigger floats?
MOBILE CRANE REVIEW QUESTIONS AND CORRECT ANSWERS LATEST 2024 A+
SCORE
Question 1
What is the purpose of placing mats or cribbing under or cribbing under outrigger floats?
Distribute the force over a larger area.
Question 2
Where is the best location for leveling a crane?
Upperworks. (a revolving frame of equipment on which operating machinery are mounted along
operator's can)
Question 3
Before leveling a mobile crane on outriggers, an operator should ensure:
There is no weight of the crane bearing on any tires.
Question 5
Operating a mobile crane with a long boom, on uneven ground, what support condition should be
considered?
Keeping a 90 degree angle between cylinder rod and pad.
Question 6
When may blocking (cribbing) be placed under outrigger beams on mobile cranes?
Never approved.
Question 7
Mobile cranes should be level to within what percent of grade?
1%
,Question 8
Timber crane mats work best when they are:
Bolted together
Question 9
When arriving in the crane at the job site, the operator should first determine the condition of the:
Access roads
Question 10
What surface listed below would not be a good location for assembly or setup of a mobile crane?
A. Above compacted fill
B. Above highway asphalt
C. Above underground vaults
D. Above highway concrete
Question 11
Each outrigger pad and its blocking should be sufficient to support?
The total weight of the crane and its load.
Question 12
How does high wind affect a mobile crane with a long boom?
Introduces side load onto the boom
Question 13
When is the only time the outrigger beams should be less than fully extended?
The load chart indicates that this is allowed (always make sure that it is safe first)
Question 14
What is the primary purpose for a rooster sheave or auxiliary boom point sheave?
,Separate the load hoist lines.
Question 15
Eccentric main boom tip reeving causes which of the following:
Twisting of the main boom
Question 16
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
A. Right regular lay
Question 17
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
1/2 inch
Question 18
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
Pendant line
Question 19
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
Secured to the outriggers cylinder
Question 20
On a mobile crane, how many broken wires are permitted at the connection of a pendant before it
must be taken out of service?
A. 6
B. 5
C. 3
D. 1
1
Question 21
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?
A. 4
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