NCCCO tower exam 7.2020 Questions with Actual Answers Graded A+
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Course
NCCCO tower
Institution
NCCCO Tower
When tower crane is erected/dismantled, written instructions must be - CORRECT ANSWER-On site
Tower crane erection/dismantling shall be performed under direct supervision of the - CORRECT ANSWER-Designated person
What is the minimum clearance from obstruction when the tower crane freely rotat...
NCCCO tower exam 7.2020 Questions
with Actual Answers Graded A+
When tower crane is erected/dismantled, written instructions must be - CORRECT
ANSWER-On site
Tower crane erection/dismantling shall be performed under direct supervision of the -
CORRECT ANSWER-Designated person
What is the minimum clearance from obstruction when the tower crane freely rotates
360•? - CORRECT ANSWER-6 ft 6 in
What must the crane operator do when a load is suspended - CORRECT ANSWER-
Remain at the controls
How often should the hoist rope be lubricated? - CORRECT 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 - CORRECT ANSWER-Twist
compensator
How many wraps shall be on the drum when the block is at its lowest point - CORRECT
ANSWER-3
The radius on a crane chart refers to - CORRECT 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 - CORRECT 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 - CORRECT
ANSWER-Only when performing the maintenance duties
, Crane must be a minimum of ____ away from power lines up to 50kV - CORRECT
ANSWER-10ft
How do you determine the size or the mats/blocking needed under tower crane
outriggers? - CORRECT ANSWER-Ground bearing capacity of The supporting surface
A crane should always be barricaded within - CORRECT ANSWER-The outermost
swing radius of the rear of the superstructure ( counterweight)
The crane must have a _________ inspection performed both monthly and yearly. This
information must be documented by the employer that conducts the inspection. -
CORRECT ANSWER-Periodic
What is the weight of steel per cubic foot ? - CORRECT ANSWER-490 lbs
If radius is in between On load chart, you should use - CORRECT ANSWER-Next
longer radius
If the boom angle is in between On The load chart , you should - CORRECT ANSWER-
Use next lower boom angle
Wind blowing on the job site can cause: - CORRECT ANSWER-Increase radius and
lower tower crane capacity
In most cases tower crane operations should be shut down with winds in excess of -
CORRECT ANSWER-45 mph
What is the weight of steel ? - CORRECT ANSWER-490 pounds per cubic foot
On a self - erecting tower crane , which of the following is included in the set up ? -
CORRECT ANSWER-Preparing foundation or ground compaction
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