If a crane’s load moment indicator (LMI) malfunctions, the operator should

cease crane operations and report the condition to the supervisor

What it the the difference between an anti-two block warning device and an anti-two block prevention device

Warning device only warns, but prevention device will stop the functions

Backwards stability of a mobile crane is tested in which configuration listed below

Basic boom at maximum angle with no load

On a mobile crane, the measurement for the load radius is the distance from the center of gravity of the load to

Center of rotation on the crane

A crack in the windshield of a crane cab is OK so long as

it causes no visible distortion that would interfere with safe operations

Electrocution warning decals must be placed

inside and outside of the operator’s station

According to OSHA, accessible areas of the operating crane must always be barricaded within

the swing radius of the rear of the rotating superstructure

How does high wind affect a mobile crane with a long boom?

Introduces side load onto the boom

When extending a boom or an outrigger, and the operator loses visual contact

A spotter or signalperson must be used

safe Working Load (SWL) of a wire rope is

breaking strength divided by a safely factor

On mobile cranes, what does the boom angle indicator show the operator

Angle of the boom to horizontal

How many randomly distributed broken wires in rotation-resistant hoist wire rope are considered for replacement

4 broken wires in 30 rope diameters

Operating a mobile crane with a long boom, on uneven ground, what support condition should be considered?

Keeping a 90 degree angle between cylinder rod and pad

Side loading of crane booms is permitted

only with freely suspended loads

An audible signal or horn

Must be accessible to the operator

Which correctly states the requirements for hooks used to hoist employees on a crane supported personal platform

Hooks shall have a latch that closes and locks

Each outrigger pad and it’s blocking should be sufficient to support?

The total weight of the crane and it’s load

When should a tagline be used

When rotation of the load would be dangerous

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Nccco Core Exam PT.1

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Questions 100

Answers

1
Who must determine maximum speed for a mobile crane to travel with a suspended load
Craft foreman
Competent person
Qualified person
Superintendent
2
If a crane’s load moment indicator (LMI) malfunctions, the operator should
attempt to repair the fault
make mathematical allowances for any error
cease crane operations and report the condition to the supervisor
turn it off and continue as if the LMl were not installed
3
Who is not allowed within the fall zone
a person hooking or unhooking a load
a signalperson
a person operating a concrete bucket
a qualified evaluator
4
What it the the difference between an anti-two block warning device and an anti-two block prevention device
Warning device only warns, but prevention device will stop the functions
Both are the same and serve the same purpose
Both will warn and stop some dangerous operations
Prevention device only warns, but warning device stop the function
5
When lifting loads on tires, mobile cranes are rated at what percentage of tipping?
85%
80%
70%
75%
6
when working around power lines of more than 750kV how much clearance is generally required from the crane and load
30 ft.
35 ft.
45 ft.
25 ft.
7
Backwards stability of a mobile crane is tested in which configuration listed below
Basic boom at minimum angle with no load
Maximum boom at maximum angle with maximum load
Basic boom at maximum angle with maximum load
Basic boom at maximum angle with no load
8
What is the most unstable area of operation on a truck crane
Side
Front
360 degrees
Rear
9
What does signal person intended by extends arm making a fist with his thumb up
Telescope out
Swing
Boom up
Boom down
10
An operator should respond to an “emergency stop” signal from
Anyone
Appointed signal person
Superintendent only
Project manager
11
If the operator makes two audible signals when moving a crane, he/she intends to
Stop (emergency)
Back up
Stop
Go forward
12
On a mobile crane, the measurement for the load radius is the distance from the center of gravity of the load to
Tipping axis of the equipment carrier
Hook rollers on the equipment carrier
Center of gravity on the crane
Center of rotation on the crane
13
A crack in the windshield of a crane cab is OK so long as
the windshield is replaced on the next annual inspection
it causes no visible distortion that would interfere with safe operations
It is never ok
it is less than 6 inches long
14
Electrocution warning decals must be placed
at eye level below an energized line
On all rigging
inside and outside of the operator’s station
In the operators manual
15
Which of the following are required at all times
A functioning anti-2-block
Tag lines
safety latches
Fire extinguisher
16
What percentage of a vertical hitch is a vertical basket hitch rated
100%
75%
50%
200%
17
What is the device called that automatically stops the boom when it nears the cranes maximum angle
Boom hoist pawl
Mechanical boom stop
Boom hoist limiting device
Boom backstop
18
According to OSHA, accessible areas of the operating crane must always be barricaded within
the carbody or chassis
the swing radius of the crane
the swing radius of the rear of the rotating superstructure
the distance between the carbody or chassis and the boom tip
19
How often is the competent person required to inspect the running wire ropes on a mobile crane
Each year
Each month
Each week
Each shift
20
Timber blocking placed under outrigger floats
increase the permitted capacity of the crane
reduce the capacity of the crane
reduce the ground pressure
make the crane less stable
21
Which one of the following would be used as a softener
Split pipe
Mats
Turnbuckle
Shackle
22
Personnel platforms suspended on the hook of a crane must not exceed What percentage of cranes rated capacity
100%
50%
125%
75%
23
What is a PTO
it may increase the cranes capacity
it is used to extend the boom
it creates hydraulic power
it controls the load
24
How does high wind affect a mobile crane with a long boom?
Requires you to slip the swing brake
Introduces side load onto the boom
Has no effect on overall crane capacity
Overheating the breaks
25
What surface listed below would NOT be a good location for assembly or setup of a mobile crane
Compacted ground
Above underground vaults
Above highway asphalt
Above highway concrete
26
What are jib capacities based on
Line pull
Stability
strength of jib material
A Safty rating of 5:1
27
How many randomly broken wires in a lay length must there be on a mobile cranes hoist line, calls for replacement
6
4
5
3
28
Truck cranes capacities are generally greater over the
Rear
Front
Right side
Left side
29
When extending a boom or an outrigger, and the operator loses visual contact
More throttle may be required
A spotter or signalperson must be used
The operator must proceed with caution
Continue normal operation
30
What is the safety factor for rotation resistant rope when used on a personnel basket
10 to 1
7 to 1
3.5 to 1
5 to 1
31
safe Working Load (SWL) of a wire rope is
always higher than the breaking strength
not critical on boom hoists
safety factor multiplied by diameter
breaking strength divided by a safely factor
32
According to OSHA 1926.1431 while hoisting a personnel platform what weather condition listed will end operations
Dark
Light
Normal
Dangerous
33
On mobile cranes, what does the boom angle indicator show the operator
Radius of the boom to ground
Angle of the boom to vertical
Axis of tipping from centerline
Angle of the boom to horizontal
34
When arriving in the crane at the job site, the operator should first determine the condition of the
Headache ball
Parking lot
Access roads
Cranes setup location
35
How many randomly distributed broken wires in rotation-resistant hoist wire rope are considered for replacement
1 broken wire in 6 rope diameters
2 broken wires in 10 rope diameters
3 broken wires in one strand in one lay
4 broken wires in 30 rope diameters
36
What can be done to temporarily operate a crane if the anti 2 block malfunctions?
Measure the boom
Reduce capacity
Mark the wire rope
Use LMI
37
Operating a mobile crane with a long boom, on uneven ground, what support condition should be considered?
Keeping a 90 degree angle between cylinder rod and pad
Blocking under the outrigger beams
Blocking under the front bumper weight
Keeping a 75 degree angle between cylinder rod and pad
38
Side loading of crane booms is permitted
so long as no jib is installed
when the operator says it’s ok
only with freely suspended loads
only when the outriggers are fully extended
39
The hand signal depicted is instructing the operator to:
Lower the load
Sit
Hoist down
Boom down
40
Type 1 rotation resistant hoist wire rope has a design factor of
10 to 1
5 to 1
2.5 to 1
3 to 1
41
An audible signal or horn
Must be accessible to the operator
Indicates an overload situation
Indicates hydraulic pressure
Must be used when swinging
42
Cranes jib is offset 15 degrees versus its original 9 degrees, but the boom angle remains unchanged. The load radius:
Cannot be determined
increases
Decreases
Remains the same
43
What is the minimum design factor required for right regular lay, boom, or hoist wire rope?
3.5
2.5
7
5
44
On a mobile crane how many broken wires are permitted at the end connection of a pendant before it must be taken out
1
5
3
6
45
Timber crane mats work best when they are
Bolted together
Nailed together
Left loose
Wired together
46
Which correctly states the requirements for hooks used to hoist employees on a crane supported personal platform
Hooks shall be able to support 20 times the normal rating
Hooks should be able to support 25 times the normal rating
Hooks shall have a latch that closes and doesn’t lock
Hooks shall have a latch that closes and locks
47
What should I avoid contacting my synthetic/nylon rigging?
alkalis
hydrocarbons
acid
alcohols
48
Each outrigger pad and it’s blocking should be sufficient to support?
The total weight of the crane and it’s load
85% of the load chart
Total weight of crane and it’s boom
Has no effect on overall crane capacity
49
Crane come into contact with energized power line no sign of danger what should you do
Climb down carefully
Stay in cab
Get far away from crane
Jump down feet together
50
Before lifting an occupied personnel platform on a jobsite the crew must ensure they perform which of the following
Must perform a trial lift
Must attend a pre lift meeting
All of the above
Must fully deploy all outriggers
51
When should a tagline be used
Never
When working near power lines
When raining and load is slippery
When rotation of the load would be dangerous
52
On a mobile crane the term “parts of line” “ refers to which item listed below
The number of lines running thru the load block and boom point sheaves
The number of sheaves mounted on load block and boom point sheaves
Total number of sheaves mounted on the crane
The number of wires and strands in the load line
53
Before leveling a crane on outriggers, an operator should ensure:
There is blocking under the outrigger beams
There is no weight of the crane bearing on any tires
The weight of the crane is on all the tires
There is some weight bearing on tires
54
What ground conditions should I be concerned with when working around a new construction site
Soft
Energized
Wet
Hard
55
When working at ground floor level near a cellar wall, the crane’s outrigger pads or tracks should be placed
as close as possible to the wall
anywhere, since the wall is unaffected by the weight of the crane
at least as far back as the depth of the wall below ground
at a distance at least half the depth of the cellar wall below ground
56
Using the preferred method of installing wire rope from a reel onto a hoist drum, the rope runs from the
top of the reel to the bottom of the drum
There is no preferred method
top of the reel to the top of the drum
bottom of the reel to the top of the drum
57
How would I determine if there is core damage on a rotation resistant wire rope
Broken wires
Bird caging
A localized reduction in diameter
Kinks
58
What is required for pick and carry operations
An axle lock
A load chart
All of the above
A load chart for this operation
59
Which type of wire rope listed below is installed on most cranes
Right alternate lay
Right regular lay
Left alternate lay
Left regular lay
60
What does the word “must” mean
Mandatory
Optional
Recommend
Should
61
What must an operator do when an operator leaves the controls of the crane for an extended period of time?
Apply all the brakes and dogs and lower the load to the ground
Apply all brakes and dogs and lower the boom to the ground
Apply all brakes and dogs, and leave the load suspended
Apply only one swing brake and leave the engine running
62
As you boom down, the leverage of the load on the crane will
Increase
Stay the same
Decrease
Depends on the weight of the load
63
Which of the following is classified as a standing wire rope
Main hoist line
Boom hoist line
Auxiliary hoist line
Pendant line
64
When is a synthetic sheave allowed
Never
only on rotation resistant wire rope
only on boom point sheaves
When it is recommended by the manufacturer
65
When lifting over water with a personnel platform, what are the occupants on the platform required to wear
Body harness
Full face respirator
Waste belt
Flotation device
66
According to OSHA,what is the minimum number of full wraps of wire rope that must remain on hoist drums in all condition
2
1
5
4
67
When may blocking (cribbing) be placed under outrigger beams on mobile cranes
Improving stability
Never approved
Extending beams
Increasing capacity
68
When preparing your crane for a storm, the operator should
Face the crane into the wind
Consult the manufacturer
Tie the hook to a solid structure
Swing the crane away from the wind
69
Capacities of a crawler crane are based on what percentage of a cranes design
85%
100%
50%
75%
70
Which of these is an example of duty cycle operation
pile driving
personnel baskets
high volume concrete placement
barge operations
71
When is an operator required to perform an inspection on operator aids?
Monthly
Each year
Each shift
Periodically
72
What is the best way to determine load weight
tag/nameplate
certified scale weight
calculate
shipping weights
73
Which is the most common cause of death to crane operators
Falls from the crane getting on and off
Crane turnover
Fire
Electrocution
74
What determines if a boom is capable of supporting dynamic loads
Structural limitations
Structural competence
Stability competence
Dynamic limitations
75
According to OSHA, what is not allowed to be done to a hoist rope
seizing
splicing
severing
shortening
76
On duty cycle operations most manufacturers require a crane’s load chart capacity to be reduced by
30%
15%
20%
10%
77
Load radius is the distance from the center of gravity of a freely suspended load to the
Center of rotation of the crane
Tipping axis
Center of the crane
Front of the crane
78
On a mobile crane, should the load be applied when determining the proper boom angle
Yes
Sometimes
Maybe
No
79
On mobile cranes, how many broken wires must be present in one strand of one lay for running wire rope to be removed
3
1
6
2
80
If a load test is done on a repaired crane, the load must not exceed what percentage of the manufacturer’s crane rating
75%
100%
85%
110%
81
According to OSHA 1926.1431 at what wind speed must a qualified person be consulted
20 MPH
10 MPH
25 MPH
15 MPH
82
Where is the best location for leveling a crane
Carbody
Carrier
Cab
Upperworks
83
On whose recommendations should a mobile crane preventative maintenance program be developed
Master mechanic
Crane operator
Company supervisor
Crane manufacturer
84
Boom length is measured from the
boom hinge pins to the boom tip
base of the boom to the center of the boom tip sheave.
base of the boom to the boom tip
boom hinge pins to the center of the boom tip sheave
85
When is the only time the outrigger beams should be less than fully available extended?
The main boom is fully retracted
There is not enough space to extend the beam
The load chart indicates that this is allowed
The crane is working over the front
86
If a bold line is shown on a load chart, the capacities below the line
are based on the structural strength of the crane
must not be used
should only be used if the crane is set up on outriggers
are based on the stability of the crane
87
What is the primary purpose for a rooster sheave it’s auxiliary boom point sheave?
Separate the boom hoist lines
Increase the load radius
Separate the load hoist lines
Decrease the load radius
88
The term jib offset can be expressed as the jib angle grinder in which mobile crane component listed below
Pendants
Boom
Gantry
Forestry
89
OSHA permits hoisting of personnel by a crane as long as the employer can show
There is no less hazardous or practical way
All aerial lifts on a site are being used that day
All personnel have CPR training and first aid
The prevailing wind speed is less than 35 MPH
90
When working on outriggers, the only time they should be less than fully extended is
There is a load chart for this operation
The main boom is being lifted
Working near the highway and lane cannot be blocked
You are handling light loads
91
jib is erected but not being used you make a deduction from the gross capacities listed in the load chart based on
the effective weight of the jib
the difference between the crane’s actual weight and its effective weight
the actual weight of the jib
nothing, since the jib is not in use
92
hoist drum flange shall extend a minimum of —- over the top layer of wire rope at all times while crane is in operation
2”
1 1/2”
1”
1/2”
93
What is the OSHA regulation governing cranes in construction
1926.1400
1910.184
1910.180
1926.556
94
According to OSHA 1926.143lduring personnel platform hoisting operations access gates shall NOT swing in which direction
Sideward
Wayward
Outward
Inward
95
When the number of layers of wire rope on a drum increases the:
Allowable line pull decreases
Allowable line pull increases
Allowable line pull can’t be calculated
Allowable line pull remains the same
96
Eccentric main boom tip reeving causes which of the following
Twisting of the main boom
Increased wire rope wear
Twisting of the superstructure
Increased carrier wear
97
What is the primary reason for using a jib
Increase capacity
Increase radius
Decrease radius
Increase tip height
98
It is important to know when lubricating crane hoist wire rope, that the lubricant must
Not be applied to regular lay wire rope
Not be applied prior to use
Not be applied in direct sunlight
Not hinder visual inspection
99
It’s OK to temporarily bypass a crane’s overload warning system
when the load to be lifted exceeds the capacity in the chart
Never
when a supervisor tells you to
during assembly/disassembly operations
100
How do you make a choker hitch
Wrap the sling around the load and place one eye in the hook
A choker hitch is not allowed
Put both eyes in the hook
Wrap sling around load and put both sling eyes in the hook

Nccco Core Exam PT.1 Flashcards | StudBud