NCCCO CORE FINAL EXAM NEWEST ACTUAL 2024
EXAM COMPLETE 400 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
VERSION A
Before leveling a mobile crane on outriggers, an operator should ensure: -
ANSWERthere 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? - ANSWERKeeping 90 degree angle between cylinder rod and
pad
What is the primary purpose fir a rooster sheave or auxiliary boom point sheave? -
ANSWERSeparate the boom hoist lines
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? - ANSWER6
On a mobile crane, how many broken wires are permitted at the end connection of a
pendent before it must be taken out of service? - ANSWER1
Type 1 rotation resistant hoist wire rope has a design factor of: - ANSWER5 to 1
How many randomly distributed broken wires in rotation- resistant hoist wire rope are
considered for replacement? - ANSWER2 broken wires in 6 rope diameters
The term net capacity is best defined by which of the terms listed below? -
ANSWERGross capacity minus capacity deductions
Mobile cranes that are set up on barges, shall have a list chart provided by which of the
entities listed below? - ANSWERManufacturer
,When lifting loads on tires, mobile cranes are rated at what percentage of tipping? -
ANSWER75%
How does the effective weight of a slowed extension relate to the actual weight of the
extension? - ANSWERHigher than the actual weight.
When load radius is between radii values, the operator must use the: - ANSWERlonger
radius
Why should only approved attachments or extra counterweights provided by the
manufacturer be placed on the rear of the crane? - ANSWERThey could cause a
backward stability problem.
A mobile crane's jib is offset 15º versus its original 0º offset, but the boom angle remains
unchanged. In this situation, the load radius: - ANSWERincreases
Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major
effect? - ANSWERCollapsing the boom.
When determining the position to a mobile crane should be left in over night, when high
winds in the forecast the operator should: - ANSWERFollow the manufacturers
recommendations.
If a mobile crane is NOT set-up level and the operator swings the load from the high
side to the low side, what effect will that have on the radius? - ANSWERThe radius
increase.
Increasing the distance from the crane's center of gravity to the tipping axis will have
what effect on the mobile crane? - ANSWERDecreases stability.
Backward stability of a mobile crane is tested in which configuration listed below? -
ANSWERBasic boom at minimum angle with no load
Deflection of the boom while operating a mobile crane will increase? - ANSWERLoad
Radius (Swings out)
A sudden start or stop of the hoisting function while operating a mobile crane can
produce a: - ANSWERdynamic load
Before lifting an occupied personnel platform on a job site, which of the following
applies? - ANSWERUse 50% of rated capacity, Trial lift to anticipated weight, Ensure
rigging dedicated to platform only.
According to OSHA 1926. 1431, while hoisting a personnel platform, what weather
condition listed below will promptly discontinue the operation? - ANSWERDangerous
, If working near overhead power line and using a tag line, which type of rope is least
conductive to electricity? - ANSWERPolypropylene
When working near power lines with the mobile crane, where does OSHA require
caution stickers be installed on all equipment? - ANSWERAt operators station and 2 on
the outside of the equipment.
According to OSHA table T, what is the minimum clearance for 133kV power lines? -
ANSWER10ft
According to OSHA's table T, what clearance should a mobile crane IN TRANSIT keep
while going under 445kV lines? - ANSWER16ft
According to OSHA when is it safe to hoist loads with a mobile crane below energized
power lines? - ANSWERWhen the fully extended boom can't reach the prohibited zone.
According to OSHA 1926. 1411, when you encounter power lines with a voltage of 44kV
and the crane is TRAVELING, according to Table T, what is the minimum required
clearance? - ANSWER6ft
According to OSHA, mobile crane load block hooks must not have a twist in excess of: -
ANSWER0
According to OSHA, mobile crane load blocks hooks must not have a throat opening in
excess of: - ANSWER5%
When correctly installing U-bolt type wire rope clips, the U portion of the clip shall be on:
- ANSWERthe dead or short end
What is the angle between the top of the load and the sling leg referred to in sling load
charts? - ANSWERHorizontal sling angle
When installing a wedge socket, it must be attached with the load line pulling in a
straight line from the: - ANSWERpin
What is the purpose of placing mats or cribbing under outrigger floats? -
ANSWERDistribute the force over a larger area
Where is the best location for leveling a crane? - ANSWERUpperworks
When may blocking (cribbing) be placed under outrigger beams on mobile cranes? -
ANSWERNever approved
Mobile cranes should be level to within what percent of grade? - ANSWER1%
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