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Nccco Core Exam PT.2 Flashcards | StudBud
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Nccco Core Exam PT.2
Nccco Core Exam PT.2
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Questions
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Answers
1
On a mobile crane, should the load be applied when determining the proper boom angle
No
Sometimes
Yes
No
2
When preparing to hoist a load, the load block hook should be positioned
Directly over the loads center of gravity
Slightly to the side opposite you’re planning to swing
Above the edge of the load closest to the crane
slightly to the side you’re planning to swing
3
A crane may become energized when
only when contact is made With an energized line
an object comes closer than the minimum distance
the crane is not grounded properly
a crane cannot be electried if the line is insulated
4
The hand signal depicted is instructing the operator to:
Swing
Retract boom
Extend boom
Boom up
5
When determining the position to a crane should be left in over night w high winds in the forecast operator should
Put the crane in weather vane position
Follow manufacture recommendations
Tie off to the closest solid structure with the wind in the front
Tie off to the closest solid structure with the wind in the back
6
A crane is at the point of instability when the cranes leverage on the load equals
75% of the loads leverage on crane
90% of the loads leverage on crane
85% of the loads leverage on crane
100% of the loads leverage on crane
7
According to OSHA 1926.1408 when operating near a high voltage power line what clearance is needed when operating 275 kV
10 feet with encroachment precautions
15 feet with encroachment precautions
20 feet with encroachment precautions
5 feet wl encroachment precautions
8
The hand signal depicted is instructing the operator to:
Stop
Hoist up
Move slowly
Dog everything
9
Increasing the distance from the cranes center of gravity to the tipping axis will have what effect on the crane
Increase structural competence
Decrease stability
Increase stability
Decrease structural competence
10
If a crane is NOT set up level and the operator swings the load from the high side to low side, how effect the radius
Radius stays the same
Radius increase
Radius will decrease
Radius can’t be calculated
11
hoisting personnel with a crane what item must be provided
Load moment indicator
Anti two block device
Free fall button
Anti collision device
12
Timber blocking placed under outrigger floats
make the crane less stable
reduce the capacity of the crane
reduce the ground pressure
increase the permitted capacity of the crane
13
When should a tag line be used, during the hoisting of material
When the rigger is not certain of the loads stability
When only one signal person is required to signal lift
When the rotation of the load would be dangerous
When the lift director leaves the area of the crane
14
If a crane’s load moment indicator (LMI) malfunctions, the operator should
make mathematical allowances for any error
cease crane operations and report the condition to the supervisor
attempt to repair the fault
turn it off and continue as if the LMl were not installed
15
While hoisting employees in a personnel platform, direct communication must be maintained between the signal person and:
Operator
Lift director
Superintendent
Rigger
16
The angles listed in a crane’s load chart
Are based on a loaded boom
Must be within 5 degrees
Are the angle of the boom to the vertical
Are based on an unloaded boom
17
When traveling with a suspended load on a crane climbing an incline, the load should be carried in which direction
Down hill
Never
Up hill
Both ways
18
According to OSHA 1926.1408 for power lines rated 100kV the minimum clearance between crane and any lines shall be
5 feet with encroachment precautions
15 feet with encroachment precautions
20 feet with encroachment precautions
10 feet with encroachment precautions
19
How can the LMl boom length or load radius reading be verified
Calibrate the LMI
No need to verify
Actual measurements
Check with the superintendent
20
According to OSHA 1926.1417 when you encounter power lines w/ voltage of 44kV and the crane is traveling what clearance
6
4
16
10
21
The term net capacity is best defined by which of the terms listed below
Net load minus gross capacity
Net load plus gross capacity
Capacity deductions minus gross capacity
Gross capacity minus capacity deductions
22
Under normal operating conditions, what can be removed from a carrydeck crane
tires
jib
All the above
safety latch
23
The hand signal depicted is instructing the operator to:
Emergency stop
Stop
Main block
Retract boom
24
According to OSHA 1926.1431 which of these hoist options is prohibited
Hoist governor
Hoist free fall
Controlled hoisting
Controlled lowering
25
Mobile cranes that are setup on barges, shall have a list chart provided by which of the entities listed below
Manufacturer
Employer
Crane owner
Superintendent
26
On a mobile crane, side loading of the boom could be caused by which of the following
Starting or stopping of the swing too rapidly
Starting or stopping the engine too rapidly
Raising or lowering the load too rapidly
Raising or lowering if the boom too rapidly
27
Capacities of a crawler crane are based on what percentage of a cranes design
75%
100%
80%
50%
28
When determining boom tip elevation for a mobile crane, the user could
Use the wiring diagram
Call the site supervisor
Use the range diagram
Call the manufacturer
29
When performing a multiple crane lift it is important for the operator’s of each crane to understand that
The weight may decrease if the other crane lands the load
The weight is equally distributed at all times during the lift
The weight is never equally distributed during the lift
The weight may increase if the other crane lands the load
30
When working near power lines with a crane, where does OSHA require caution stickers be installed on all equipment
At operators station and 5 on the outside of equipment
On the equipment carrier and on the main boom
On the equipment superstructure and the extension
Outside and inside the Operators station
31
OSHA 1926.1431 states that tag lines must be used
When overload conditions exist
When platform is in static condition
When overload conditions exist
When necessary to control platform
32
in a range diagram, boom length and angle can be used to determine
Load radius
Crane Capacity
Gross Load
Load weight
33
Why do most crane manufacturers reduce load capacity for duty cycle operations?
Dynamic loads are not encountered
side loading forces may Occur
Front loading forces may Occur
The maximum load is almost always known
34
Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major effect
Overheating the swing break
Collapsing the boom
Increasing the ground pressure
Overheating the race and bearings
35
According to OSHA 1926.1431, which device listed below must be attached to cranes
Dead section
Swing away
Two way bridle
Anti two block device
36
The hand signal depicted is instructing the operator to:
Swing right
Lower load
Cable down
Hoist down
37
According to OSHA TABLE T what clearance should a mobile crane IN TRANSIT keep while going under 446kV lines
6 feet
10 feet
16 feet
4 feet
38
Deflection of the boom while operating the crane will increase
Load radius
Load weight
Weight of boom
Crane’s stability
39
According to OSHA 1926.1408 the minimum clearance between any part of the crane and power lines rated 50 kV or below
10 feet with encroachment precautions
20 feet with encroachment precautions
5 feet w encroachment precautions
15 feet with encroachment precautions
40
Which of these is an example of D/d ratio?
the rotation of the hoist drum
the distance from the center of rotation of the crane
the diameter of the sling divided by the diameter of the load
the diameter of the load divided by the diameter of the sling
41
How many wraps must remain on a boom hoist drum when boomed down to its lowest point
4
3
2
1
42
The hand signal depicted is instructing the operator to:
Use main hoist
Boom up
Swing right
Boom down
43
According to OSHA table T what is the minimum clearance for 133kV power lines
4 feet
3 feet
10 feet
15 feet
44
When load radius is between radii values, the operator just use the
Longer radius
Longer angle
Shorter radius
Shorter angle
45
Backward stability of a crane is at its worse with
short boom, no load
long boom, heavy load
long boom, no load
short boom, heavy load
46
According to OSHA, when working near power lines when is a dedicated spotter required
When the crane moves within 15 feet of power lines
When the operates is unable to see the warning line of signs
When the crane, load or tagline gets closer than the min. distance
When the crane signal person is elevated from crane level
47
When lifting loads that are submerged underwater with a crane what condition should the operator should be familiar with
Current can change and cause the crane to tip over
Brakes or dogs could get wet on the crane and slip
Load will increase when lifting the load out of the water
Boom and extension can’t be moved without high tide
48
Why should only approved attachments or extra counterweights from the manufacturer be placed on the rear of the crane
They could cause a backward stability problem
The ground pressure will increase
The swing Clearance will increase
The crane will develop a swing problem
49
on an existing site who’s responsible for ensure ground conditions meet manufacturer’s specifications
crane owner
site supervisor
crane operator
controlling entity
50
The hand signal depicted is instructing the operator to:
Hoist up
Retract boom
Boom up
Lower load
51
The hand signal depicted is instructing the operator to:
Boom down
Extend boom
Hoist up
Retract boom
52
According to osha when is it safe to hoist loads with a crane below energized power lines
If a crane is equipped with a isolated link or proximity alarm
If the crane only raises the boom to a maximum angle of 60 degrees
When the boom is kept 10 feet away from power lines for 360 degrees
When the fully extended boom can’t reach the prohibited zone
53
The hand signal depicted is instructing the operator to:
Use main block
Dog everything
Travel
Use whipline
54
If lifting a load with 2 mobile cranes of different rated capacities, the crane with the larger rated capacity should
Be hooked at a distance closer to the loads center of gravity
Be hooked at a distance farther from the loads center of gravity
Be hooked at the loads center of gravity
Be hooked at an equal distance from the load’s center of gravity
55
What is can display the radius, load, and boom length
Rated capacity
All the above
LMI
Load moment indicator
56
When making a lift on outriggers, the maximum ground bearing pressure occurs in which boom position
Over the corner
Over the rear
Over the side
Over the front
57
A frequent inspection is
to be performed by the mechanic
daily to monthly
monthly to annually
the same as a periodic inspection
58
On lattice boom truck cranes, the boom angle is measured between the centerline of the
unloaded boom and horizontal
loaded boom and horizontal
loaded boom and ground
unloaded boom and vertical
59
What percentage of the rated capacity of crane must be used when lifting with two cranes attached to the same load
85%
75%
100%
90%
60
The hand signal depicted is instructing the operator to
Swing left
Stop
Swing right
Emergency stop
61
Which mobile crane boom configuration can cause the most hazardous side loading condition for the crane
Long boom at 45 degree angle
Long boom with minimum radius
Short boom at 45 degree angle
Short boom with minimum radius
62
On mobile cranes range diagram, boom length and boom angle can be used to determine
Load radius
Gross capacity
Counterweights
Load weight
63
The hand signal depicted is instructing the operator to:
Lower load
Boom up
Hoist up
Dog everything
64
When can capacity altering modifications be made to cranes
When lifting in the tipping position of the load chart
When lifting in the structural position of the load chart
When permission is given by the manufacturer
Capacity altering modifications may not be made to cranes
65
The hand signal depicted is instructing the operator to:
Travel
Swing
Lower load
Boom up
66
If working near power lines and using a tag line which type of rope is least conductive to electricity
Hemp
Cotton
Nylon
Polypropylene
67
Which configuration can cause the most hazardous condition for boom side loading
short boom minimum radius
long boom minimum radius
short boom maximum radius
long boom maximum radius
68
On a mobile crane, what is the weight of the erected jib that is deducted in the load chart calculations called
Effective weight
Actual weight
Non effective weight
Non-deducted weight
69
When proof testing a personnel platform to 125% of its rated capacity, how long must the platform be suspended?
1 minute
5 minutes
10 minutes
7 minutes
70
How many broken wires are allowed at the end connection of a pendant line
3
1
4 in 30 diameters
2 if they are in the same strand
71
The hand signal depicted is instructing the operator to:
Cable up
Swing right
Boom up
Hoist up
72
Which of the following standards or regulations governs the lifting of personnel in construction
PCSA#4
ASME B30.5
OSHA 1910.180
OSHA 1926.1431
73
What is a holding valve
A check valve to prevent cylinders from falling if a hose is cut or damaged
The valve in the control level
It hold the wench motor
It must be locked to keep load suspended
74
A lufting jib is
a jib that moves independently of the boom and is controlled from the cab
only used on lattice boom cranes
an offsettable jib
a fixed offset jib
75
The hand signal depicted is instructing the operator to:
Use Whipline
Boom up
Use main hoist
Move slowly
76
When lifting a load with 2 mobile cranes, it is very important to
Keep the working radius of both cranes identical
Keep the hoist lines of both cranes vertical
Use only cranes from the same manufacturer
Use only cranes with the same rated capacity
77
Before lifting an occupied personnel platform on a jobsite, which of the following applies
Must trial lift anticipated load weight
Must use 50% of the cranes rated capacity
Must ensure rigging is dedicated to platform only
All of the above
78
When lifting off the main boom, how is the effective weight of the fly/jib different in the erected position from stowed
Effective weight is reduced by 75%
Effective weight decreases
Effective weight is reduced by 85%
Effective weight increases
79
Inside the personnel platform except for gates, how much of the perimeter must contain a grab rail for the occupants
110%
50%
85%
100%
80
What is the minimum pitch diameter used for sheaves in a boom hoist reeving system using rotation resistant wire rope
Not less than 18 times rope diameter
Not less than 20 times rope diameter
Not less than 15 times rope diameter
Not less than 16 times rope diameter
81
What is the maximum allowable wind speed for a crawler crane with a luffing jib?
consult your supervisor
manuracturers specitication
OSHA maximum 30 mph
20 mph
82
Which person listed below has the responsibility for determining the correct weight of the load
Signal person
Crane owner
Crane operator
Lift director
83
When setting a crane up on outriggers, the wheels of the crane should
stay firmly on the ground to support the crane
be slightly touching the ground
be as high as possible off the ground
be just slightly off the ground
