When tower crane is erected/dismantled, written instructions must be - ANSWER On site
Tower crane erection/dismantling shall be performed under direct supervision of the - ANSWER Designated person
What is the minimum clearance from obstruction when the tower crane freely rotates 360•? - ANS...
NCCCO tower exam 7.2024
CORRECT 100%
When tower crane is erected/dismantled, written instructions must be - ANSWER
On site
Tower crane erection/dismantling shall be performed under direct supervision of
the - ANSWER Designated person
What is the minimum clearance from obstruction when the tower crane freely
rotates 360•? - ANSWER 6 ft 6 in
What must the crane operator do when a load is suspended - ANSWER Remain at
the controls
How often should the hoist rope be lubricated? - ANSWER Every 200 hours
If block is twisted, it may be necessary to fix the ______________ and make a few
empty runs with the hook and trolley and then reopen - ANSWER Twist
compensator
How many wraps shall be on the drum when the block is at its lowest point -
ANSWER 3
, The radius on a crane chart refers to - ANSWER Center of rotation to center of
gravity of load or hook
What would cal for a running rope to be taken out of service - ANSWER 12
randomly distributed broken wires in one lay or 4 in one strand in one lay
maintainence personnel are only permitted to operate crane when - ANSWER
Only when performing the maintenance duties
Crane must be a minimum of ____ away from power lines up to 50kV - ANSWER
10ft
How do you determine the size or the mats/blocking needed under tower crane
outriggers? - ANSWER Ground bearing capacity of The supporting surface
Where shall a fire extinguisher , with a minimum 10ABC classification be installed
on a tower crane ? - ANSWER In the cab or at the machinery housing
Where should tools be kept on a crane when they are not being used ? - ANSWER
Toolbox
List 2 functions that increase the load radius - ANSWER Trolley out and swing
Which item below weighs 490 pounds per cubic foot ? - ANSWER Steel
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