ACTUAL QUESTIONS AND WELL DEFIENED
ANSWERS ALREADY GRADED A+
Which area do truck cranes without a 5th outrigger generally have no lifting
capacity unless the manufacturer states otherwise? - ANSWER✔✔-The front
What is the definition of "operating radius?" - ANSWER✔✔-The distance from
the center of rotation of the crane to the center of gravity of the load
What applies to the capacities below the bold line shown on a load chart? -
ANSWER✔✔-They are based on the stability of the crane
In which quadrant are rough terrain crane capacities generally greater? -
ANSWER✔✔-Over the front
What percentage do most manufacturers requires a crane's load chart capacity
to be reduced by for duty cycle operations - such as high-volume concrete
placement? - ANSWER✔✔-20%
From which two points should the boom be measured? - ANSWER✔✔-From the
boom hinge pins, to the center of the boom tip sheave
, What is the preferred method of installing wire rope from a reel onto a hoist
drum? - ANSWER✔✔-Running the rope from the top of the reel, to the top of
the drum.
Over which quadrant are truck crane capacities usually greater? - ANSWER✔✔-
Over the rear
According to OSHA, which accessible area of an operating crane must always be
barricaded? - ANSWER✔✔-The swing radius of the rear of the rotating
superstructure
What is the OSHA regulation governing cranes in construction? - ANSWER✔✔-
1926.1400
According to ASME, what percentage of the manufacturer's crane rating must
not be exceeded if a load test is done on a repaired crane? - ANSWER✔✔-100%
Where is the tipping axis of a crawler crane located? - ANSWER✔✔-It depends if
the idler or sprocket are in line or offset from the track rollers
What should be done with materials placed under overhead energized power
lines? - ANSWER✔✔-NOT be lifted by crane
What determines the amount of deduction required for an erected jib that is
not being used? - ANSWER✔✔-The effective weight of the jib
What happens to ground bearing pressure if you move a crawler crane from
soft ground to harder ground? - ANSWER✔✔-It increases