Mobile Crane Questions Test #5 with 100% Correct Answers
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Mobile Crane Operator
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Mobile Crane Operator
Mobile Crane Questions Test #5 with 100% Correct AnswersMobile Crane Questions Test #5 with 100% Correct AnswersMobile Crane Questions Test #5 with 100% Correct AnswersMobile Crane Questions Test #5 with 100% Correct Answers
What action does a signal person intend the operator to perform if he ext...
Mobile Crane Questions Test #5
with 100% Correct Answers
What action does a signal person intend the operator to perform if he extends his
arm at shoulder height, makes a fist with his hand, and sticks his thumb up? -
ANSWER - Boom up.
According to ASME B30.5 mobile crane standard, how many randomly distributed
broken wires, maximum, in rotation-resistant rope is cause for replacement of the
rope? - ANSWER - 2 broken wires in 6 rope diameters.
Within what percentage of level does a telescopic boom crane have to be for the
gross ratings in the load chart to remain valid? - ANSWER - 1%.
According to the B30.5 mobile crane standard, it's OK for an operator to leave the
cab of a crane with the engine running so long as: - ANSWER - The operator keeps
the crane in view and restricts access to the area around the crane.
If a bold line is shown on a load chart, the capacities below the line: - ANSWER - Are
based on the stability of the crane.
On duty cycle operations, such as skipping concrete, most manufacturers require a
crane's load chart capacity to be reduced by: - ANSWER - 20%.
A truck crane is set up on outriggers. The part of the load chart governed by
stability is based on what percentage of the crane's capacity? - ANSWER - 85%.
What is the OSHA regulation governing cranes in construction? - ANSWER -
1926.1400.
A crane is set up with 3 of its 4 outriggers fully extended and the fourth retracted.
The capacity of the crane in this configuration will be found in the: - ANSWER - On-
rubber chart or lowest applicable load chart.
, What is the net capacity of a crane on main boom unless the manufacturer states
otherwise? - ANSWER - The capacity listed in the load chart minus the weight of the
rigging and all attachments.
What may happen to a properly rigged load when lifted off the ground unless the
operator takes account of boom deflection? - ANSWER - It could swing out away
from the crane.
When lifting personnel, the total weight of the loaded personnel platform must not
exceed what percentage of the rated capacity of the crane? - ANSWER - 50%.
The tipping axis of a crawler crane: - ANSWER - Depends if the idler or sprocket are
in line or offset from the track rollers.
If a jib's capacity is 5 tons, and the headache ball weighs 900 lbs, the net capacity
load would be: - ANSWER - 9,100 lbs.
What action does a signal person intend the operator to perform if he extends his
arm at shoulder height, makes a fist with his hand, and sticks his/her thumb up? -
ANSWER - Boom up.
When hoisting personnel, within what percentage of level must a telescopic boom
crane be in order for the gross ratings in the load chart to remain valid? - ANSWER -
1%.
The load line of the crane you're operating contacts an energized power line.
There's no sign of any other danger, such as fire. What should you do? - ANSWER -
Stay in the cab until the lines are de-energized.
According to OSHA 1926.1413, how many randomly distributed broken wires in
rotation-resistant rope are cause for replacement of the rope? - ANSWER - 2 broken
wires in 6 rope diameters.
What Standard Method hand signal is being illustrated? (Arm raised horizontal with
hand closed in fist, a finger pointing..). - ANSWER - Swing.
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