Exam (elaborations)
TOWER CRANE QUESTIONS AND ANSWERS
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TOWER CRANE QUESTIONS AND ANSWERS
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TOWER CRANE QUESTIONS AND ANSWERSWhich of the following OSHA regulations govern suspended personnel platforms? -
Answers -OSHA 1926.1431
According to ASME B30.3 The prohibited zone for power lines that are 60 kV is -
Answers -15 ft
According to ASME B30.3, load hoist rotation resistant wire rope has a design factor of -
Answers -5 to 1
According to ASME B30.3 when Lifting a suspended personnel platform design factor
for the rigging hardware is - Answers -5 to 1
According to ASME B30.3 Load hoist ropes that are not rotation resistant must have a
design factor of - Answers -5 to 1
Cranes lifting personnel platform must have the platform and rigging inspected: -
Answers -Prior to each shift
Crane hooks must not be twisted in excess of: - Answers -10 degrees
A Crane hook's throat must not exceed: - Answers -15% of its original size
By order of hitch strength which is the correct answer? - Answers -
Basket,vertical ,choker
According to ASME B30.3 And OSHA you should always have at least how many wraps
on the hoist drum? - Answers -2
What is the minimum allowable distance from the crane and power lines under 50 kV? -
Answers -10 ft
According to ASME B30.3 How many randomly broken wires must there be to remove a
running wire rope from service? - Answers -12
According to ASME B30.3 when working near power lines when is a signal person
required? - Answers -When crane moves within a booms length of power lines
According to OSHA after the crane has been checked out and before personnel lift
operations begin the crew should: - Answers -Have a pre-lift meeting
According to OSHA when is it safe to work closer than the allowable distance from
power lines? - Answers -When utility company says lines are De-Energized
When should a tagline be used? - Answers -When rotation of load would be dangerous
, What is the minimum design factor required for a boom hoist rope? - Answers -3.55
How many broken wires must be present in one strand of one lay for running wire rope
to be removed from service? - Answers -4
What is the maximum permitted wind speed when climbing a tower? - Answers -20 mph
According to ASME B30.3 A crane should be plumbed to: - Answers -1 to 500
According to ASME B30.3 The rated load under static conditions shall not exceed
_________ of calculated tipping loads - Answers -63%
According to AMSE B30.3 an overhead powerline is ALWAYS considered to be: -
Answers -Energized until the power company has verified it is not energized
High tensile bolts shall be marked with manufacturers designation and: - Answers -
Strength rating
Bolt connections for tower sections must use high tensile strength nuts with ratings of: -
Answers -12
Washers used in high tensile bolt connections shall be marked with: - Answers -HV
Before installation high tensile bolt connection Components shall be cleaned and
visually examined for: - Answers -Damage and corrosion
When ready to torque the nut on a high tensile bolt connection you should: - Answers -
Lubricate threads
During tightening of high tensile connections the bolt is stretched to a specific
percentage of its elastic limit at the correct: - Answers -Torque
Preferably the tightening torque shall be applied to the: - Answers -Nut
The tightening torque values placed on the nuts and bolts of high tensile bolt connection
are dependent on the: - Answers -Type and size
What components of a tower crane are connected with high tensile bolt connections? -
Answers -Foundation anchors, tower sections, slewing ring support
When the Tower base bolts are torqued the counter jib should be positioned: - Answers
-0° from the bolt
According to the NCCCO tower crane reference manual what items below should be
part of the operators Daily pre-check? - Answers -Wire ropes, limit switches
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