CCO Flashcards
1
Q
Where is the best location for leveling a crane?
A
Upperworks
2
Q
What is the best method for determining gross load?
A
Get an accurate load weight and add the rigging
3
Q
By order of hitch strength, which is the correct order?
A
Basket , vertical, choker
4
Q
What is the purpose of using a jib?
A
Increase height
5
Q
When taking a side strain on a boom, what concerns the operator the most?
A
Boom damage
6
Q
You should always have at least how many wraps on a hoist drum?
A
Two
7
Q
On a load chart, values above the bold line mean
A
Capacities based on structural competence
8
Q
The primary purpose for a rooster sheave or auxiliary boom point sheave is to?
A
Separate the hoist lines
9
Q
When the number of layers of rope on a drum increases the….
A
Line pull decreases
10
Q
According to OSHA 1926.1408-table A, what is the minimum allowable distance from the crane load line to the power lines, with lines rated at 63 kv?
A
15 ft
11
Q
The term upperworks or superstructure refer to the area of the crane…..
A
Above the turntable
12
Q
Side loading may be caused by?
A
Starting or stopping the swing to rapidly
13
Q
What is the best procedure to follow when underground utilities may be present?
A
Get information from the controlling entity
14
Q
Eccentric main boom tip reeving causes…..
A
Torsion or twisting of the boom
15
Q
How many randomly broken wires must there be to remove a 6x25 running wire rope from service?
A
6
16
Q
When lifting Personnel in a man basket using 6x19 wire rope, the minimum safety Factor is?
A
7
17
Q
What is the Safety Factor required when using non-rotating wire rope and lifting personnel in a man basket?
A
10:1
18
Q
Who has the responsibility to verify that the load is within the rated capacity of the equipment?
A
Operator
19
Q
If replacing the hoist line wire rope on a crane, how do you determine the size or type of wire rope to use?
A
Use the manufacturer’s operators manual or load chart
20
Q
According to ASME B30.5 and B30.23, Personnel platform lifts shall not be made with wind in excess of…..
A
20 mph
21
Q
When is it safe to work closer than the allowable distance from Power lines?
A
When the utility company says the lines are de-energized
22
Q
During setup, how do you determine machine clearances (counterweight, boom, outriggers)?
A
Measure for correct distance
23
Q
When operating a crawler crane, what is the most unstable allowable quadrant of operation?
A
Side
24
Q
When operating a truck crane, what is the most unstable allowable quadrant of operation?
A
Side
25
When should a tagline be used?
When rotation of load would be dangerous
26
When an operator arrives at the job site and the crane is already erected, how would the operator check the main and auxiliary hoist brakes?
Lift the load off the ground a few inches and apply the brake
27
What is the difference between an anti-two-block warning device and an anti-two-block prevention system?
A warning device warns you, a prevention system stops the function
28
Who gives the operator hand signals?
The qualified person assigned prior to the lift
29
Why use mats or cribbing?
To reduce ground pressure
30
Tipping capacities of crawler cranes are based on what percentage of tipping?
75%
31
Should the load be applied when determining the proper boom angle?
Yes
32
When should the operator use the "Run by the seat of your pants" technique?
Never
33
Load radius is the distance from the center of gravity of the suspended load to the.....
Center of rotation
34
What is the primary reason for using a boom extension?
Increase height
35
What is the minimum design factor required for 6x25 right regular lay running rope?
3.5
36
On cranes with individually controlled power boom sections, unless otherwise specified, the sections must be extended how?
All sections should be telescoped equally
37
How does the operator determine if the correct load chart is being used?
Matching serial numbers
38
What is net capacity?
Gross capacity minus deductions
39
If the SWL (safe working limit) of a cranes wire rope is 10,000lbs using one part, what is the SWL using four parts?
40,000lbs
40
When first arriving on the job site, the operator should first determine the condition of the.....
Access road
41
How does the operator verify the LMI's boom length or load radius reading?
Actual measurements
42
If the rated capacity of the crane is above the solid line or within the shaded areas or has an asterisk next to it, this means the capacity is based on:
Structural competence
43
How many broken wires must be present in one strand of one lay for 6x37 running wire rope to be removed from service?
3
44
In a range diagram, boom length and angle can be used to determine approximately what?
Load radius
45
What is the best type of tagline to use around power lines?
Dry polypropylene
46
When making a multiple crane lift, what is important for the operator to understand?
The weight may increase if the other crane lands the load first
47
If a crane is not set up level and the operator swings a load from the high side to the low side the load radius will.....
Increase
48
Most crane manufacturers reduce load capacity for duty cycle operations because.....
Side loading forces may occur
49
On whose recommendations should a preventative maintenance program be set up?
Crane manufacturer
50
What is the standard rope used on most cranes?
Right regular lay
51
What is the proper way to calibrate a boom angle indicator?
Using a level, raise or lower the boom to horizontal and set the indicator at 0°
52
The red area of an instrument gauge means?
A dangerous condition exists
53
The best way to keep people from being injured from the counterweight of the crane is to:
Erect and maintain control lines
54
Only approved attachments or extra counterweights made by the manufacturer should be placed on the rear of the crane because.....
They could cause a backward stability problem
55
What's the first thing an operator should do before going under a low pipe rack?
Post a signal person to check clearance
56
When working on outriggers, the only time they should be less than fully extended is when.....
There is a load chart for this operation
57
When lifting loads from the water, what should the operator be aware of?
The load will increase when you pick the load from the water
58
What is required on a hydraulic crane in order to attach and use a Personnel platform?
Boom length indicator
59
When working on rubber, cranes are rated at what percentage of tipping?
75%
60
What is the backward stability of a crane is tested with?
Basic boom at maximum angle with no load
61
For main boom capacities when either boom length or radius are between values listed, you should:
Use the next longer or shorter boom length, whichever is the least capacity
62
When a spinning load presents a danger, the operator should:
Use a tagline
63
The jib capacity is 8 tons and the ball weighs 900 lbs. What is the heaviest load that can be lifted safely?
15,100 lbs
64
What do "Parts of Line" mean?
The number of lines running through the load block
65
If a jib is erected but not being used, it is treated as a deduction from the cranes what?
Gross capacity
66
What is the maximum number of broken wires acceptable before replacement on a standing wire rope?
2
67
What are most jib capacities based on?
Structural capacity
68
On the majority of conventional cranes, power is transferred to the torque converter by a.....
Master clutch
69
During disassembly of a long boom, the pendant lines are connected at the maximum cantilever point, (the pendants are under tension and the boom tip is touching the ground) which pins are to be removed first?
The bottom pins ahead of the cantilever point
70
When using load/capacity charts, what does the term "Jib Angle to Ground" refer to?
Main boom angle minus the jibs offset
71
A truck crane, without riggers properly set, is rated at what percentage of its tipping capacity?
85%
72
On a truck crane with outriggers extended and set, and tires touching the ground, the operator should refer to what load chart?
On rubber chart
73
When testing a Personnel platform, how long must the proof test be maintained?
5 minutes
74
What is the minimum pitch diameter for load block sheaves?
Not less than 16 times rope diameter
75
Power is transferred to the swing through a.....
Pinion gear
76
LMI's shall be installed on cranes with a lifting capacity of.....
3 ton and above
77
When lifting personnel, the cranes hook must be the type that.....
Can be closed and locked
78
What is the maximum advisable wind speed for Crane operation?
Follow manufacturer's recommendations
79
When working near power lines, where should Hazard stickers be installed?
In the operator's cab, and at least two on the outside of the crane
80
For jib backlash, how much is allowed?
5 degrees
81
Cranes must be level within what percentage?
1%
82
According to ASME B30.5, a frequent inspection is:
Daily to monthly
83
According to ASME B30.5, a periodic inspection is:
Monthly to annually
84
Test loads shall not exceed ______ of manufacturer's load ratings
100%
85
According to OSHA, how often should a daily inspection be performed
Each shift
86
According to OSHA, cranes lifting Personnel platforms must have an inspection performed each:
Shift and after the trial lift
87
Crane hooks must not be twisted in excess of:
Any visibly apparent bend or twist from the plane of the unbent hook
88
Crane hooks throat opening must not exceed:
5% of its original size - not to exceed 1/4 in
89
What is the jib offset?
Jib angle to the Boom
90
The crane is out of level, you release a swing break, the boom swings downhill, what happens to your radius?
Load radius increases
91
Blocking can be placed under the ends of the tracks to.....
Increase the cranes stability when operating over the front or back
92
What quadrant produces the least amount of ground pressure on a lattice crawler?
Side
93
On lattice boom cranes fitted with power load lowering, a heavy load should be lowered by using the:
Power load lowering feature and the foot brake
94
Abruptly stopping a rapid swing on a long boom mobile crane will produce what major effect?
Overturning the crane or collapsing the boom
95
When the boom control lever is moved to the center position, which action should be expected?
The boom hoist will be held stationary
96
On a lattice boom crawler crane, where is the main boom length measured from?
Center of the boom heel pins to the center of the boom tip sheave
97
If you can't level your crawler crane:
Don't operate the crane
98
What effect does retracted side frames have on a crawler crane?
Decrease in capacity
99
If your crawler crane is on a barge, it is necessary to:
Secure the crane to the barge
100
A pin-connected lattice boom is being dismantled. After connecting the equalizer (bridle) to the connecting lugs on the boom, (under tension) which boom connecting pins should be removed first?
Lower connection pins, located ahead of the equalizer
101
When using a mobile crane on a barge, the cranes load capacity chart shall be:
Replaced by a list chart
102
How many broken wires are permitted at the end connection of a pendant before it must be taken out of service?
1
103
If high winds are expected and the lattice boom crane must be secured pointing into the wind, then the hook should be......
Secured to a solid structure directly below the boom point
104
When assembling a lattice boom on most crawler cranes using inserts of different lengths, which insert section generally should be closest to the boom foot?
Shortest section
105
During assembly where should you attach synthetic slings to lift boom sections?
Main chords
106
Which boom configuration can cause the most hazardous boom side loading condition?
Long boom with minimum radius
107
When is it safe to handle loads under power lines?
The load nor any part of the crane can come closer than regulations allow
108
On a lattice boom truck crane, boom angle is measured between the center line of the:
Loaded boom and the horizontal
109
When a lattice boom truck crane is lifting on outriggers, the floats or pads should always be:
Secured to the Outriggers
110
Manufacturer specifications permit only a certain amount of boom to be suspended out past the connection point of the pendants during assembly or disassembly of the boom. What is the portion of the boom that is suspended in this way is called?
Cantilever length
111
When lattice boom is being disassembled or shortened, it is extremely important to:
Never touch any pin on any boom section located between the pendant attachment points and the crane
112
When installing a pin-connected lattice boom on a crawler crane you should always:
Use the boom hoist pawl to hold the boom
113
When you change the jib to ground angle from 40° to 30°, you have:
Decreased the capacity of the jib
114
A truck crane operating with Outriggers fully extended and set, does not have a fifth front outrigger, the operator should:
Refer to the manufacturer's working area diagram
115
A lattice boom truck crane, when set up out of level, will lose the most capacity with?
Long boom; short radius
116
What is the device that automatically stops the boom when it nears the maximum angle?
Boom hoist kick-out
117
When a lattice boom truck crane is operating on properly set outriggers, the tipping axis is located at the:
Point where the Outriggers touch the ground
118
What is the purpose of placing mats or cribbing under outrigger floats?
Distribute the downward force of the float over a larger area
119
Each outrigger pad and it's blocking should be a sufficient support:
The total weight of the crane and its load
120
How does high wind affect the setup of a crane with a long boom?
Introduces sideload onto the boom
121
When Personnel platforms are lifted with a telescopic crane:
A two block damage prevention system is to be provided
122
A telescopic crane is equipped with an anti-2 block lockout device. When the device is activated which functions should be disabled?
Hoist up, extend out and lower the boom
123
What should you do when transporting a load on a carry deck?
Center the load on the deck of the crane
124
Jib capacities are based on what?
Structural strength
125
When making a lift on outriggers, where does the maximum ground bearing pressure occur?
Over the corner
126
A crane's jib is changed from 0° to 15° offset, but the main boom angle remains unchanged, what will happen to the load radius?
Increase
127
Blocking which is not tightly placed may fail at what percentage?
50% of design
128
If the jib is offset, the cranes capacity will:
Be reduced
129
What is the safest speed for a crane carrying a load?
The manufacturer's speed limit
130
What does the boom angle indicator indicate?
Angle of boom to horizontal
131
When performing a pick and carry lift with a rough terrain hydraulic crane, what is the most important consideration?
Keeping the boom as low as possible with the load close to the ground
132
Jib offset is the jib angle to the what?
Boom
133
When should all hazards and problems that are found on the work site be identified?
At the pre-operational work site inspection
134
Which OSHA regulation govern suspended personnel platforms?
OSHA 1926.1431
135
According to ASME B30.5, what is the prohibited zone for power lines that are 210kV
20 ft
136
According to ASME B30.5, you are required to pass a physical exam every ______ years
3 years
137
According to OSHA, when operating a mobile crane, when should you inspect your running wire rope?
Each shift
138
What is important when lifting a load with more than one crane?
Keep the hoist lines of both cranes vertical
139
Rotation resistant wire rope has a design factor of what?
5:1
140
What is line pull?
The amount of weight a drum will hoist for a given layer
141
How is boom length measured?
Center of the foot pins to the center of the head sheave pins
142
What is the weight called of the stowed jib used in the load calculation?
Effective weight
143
What is a Crane's rated capacity based on?
Structural and stability
144
What is the design factor for the rigging hardware when lifting a suspended Personnel platform?
5
145
If using cranes of different rated capacities, the crane with the larger rate of capacity should:
Be hooked a distance closer to the loads center of gravity
146
Hoist ropes that are not rotation resistant must have a design factor of:
3.5 to 1
147
Backward stability of an RT crane could be a problem when the crane is working:
Over the side at a minimum radius
148
It is important to inspect rotation resistant wire rope more frequently because:
Internal damage will occur more frequently
149
What's important to know when lubricating wire rope with a lubricant?
Not to hinder visual inspection
150
Breaking strength divided by the design factor equals:
Working load limit
151
What is the best way to determine boom tip elevation?
Use the range diagram
152
When determining what position to dog the machine overnight and high winds are expected:
Follow the manufacturer's recommendations
153
When a crane is in transit and you are required to travel under a 50kV power line, what is OSHA's minimum required clearance?
6 ft
154
When do timber mats work best?
When they're bolted together
155
When is the only time an employer may use a suspended personal platform?
When there is no other safer way
156
What is the greatest cause of ground personnel deaths?
Electrocution
157
When lifting a suspended personal platform, the cranes capacity must not exceed what percent of the rated capacity?
50%
158
What will boom deflection do?
Increase load radius
159
What's the effect of a load leverage being greater than the cranes leverage?
Instability
160
Blocking under the Outrigger pads/floats shall be:
Sufficient to support the crane and the load
161
With a pick and carry operation, the rated tipping capacity is based on what percentage of the total tipping capacity?
75%
162
What must all telescopic boom cranes be equipped with?
Boom angle indicators
163
When setting up a crane on uneven ground how should you block?
Block under the pad and keep 90° angle between the cylinder rod and the pad
164
On a hydraulic truck crane that has all five outriggers properly positioned on firm supporting surfaces, the working area diagram from the load capacity chart will indicate that the over the front area is:
Different depending on the crane manufacturers definitions and determination
165
Performing a pick and carry operation with a rough terrain crane you should keep the load where?
Positioned over the front of the carrier
166
When a cranes hydraulic boom sections are required to be extended equally, and they are not, the:
Longest section can be damaged
167
What is required on a telescopic crane going to lift a Personnel platform?
Boom length indicator
168
What must the operator do when hoisting a load that is 90% or more of the maximum line pull?
Test the Hoist brakes by lifting the load a few inches and applying brakes
169
What is a stationary load?
Static
170
What should you do when operating an RT Crane and extending the Outriggers from the upper?
Make visual contact or post a spotter
171
What happens to the effective weight of the jib when erected from the stowed position?
Increases
172
What quadrant will exert the most ground pressure when swinging the load of any crane on Crawlers?
Corner
173
How does the effective weight of a stowed jib/extension relate to the actual weight of the jib/extension?
Lower than the actual weight
174
When proof testing a personnel platform the operator must load it to 125% of its rate of capacity and hold it for how long?
5 minutes
175
When operating a crane on a barge, who must provide the list chart?
The manufacturer
176
In setting up the crane, the operator can extend three outriggers fully and one only halfway out, but all vertical cylinders are down, and floats are on good supports. The operator must:
Use the on rubber load chart
177
According to OSHA, which hand signal examples must be used to Signal cranes?
OSHA 1926.1400 appendix A
178
Who gives the operator hand signals?
The qualified person on the job site
179
Any direction given to the crane operator by the signal person shall be given from The Operators what?
Perspective
180
What is the first element of voice signals given to a crane operator prior to the lift?
Function and direction
181
OSHA's definition of new signals are located where?
OSHA 1926.1419(d)
182
How should the blocking be under a mobile crane Outrigger?
Parallel and tightly spaced
183
What percentage of mobile crane accidents is caused by improper crane setup?
Over 50%
184
What condition causes the lifting capacity to be most affected when a mobile crane is out of level?
Long boom, minimum radius
185
What is the minimum recommended swing clearance for a mobile crane?
2 ft
186
Where is the best location for leveling a crane?
Upperworks
187
What is the best place to lift from when lifting boom sections for assembly or disassembly?
Chords
188
It is recommended to lift boom sections with which type of rigging?
Synthetic web slings
189
When are most lattice boom sections damaged?
Transport and handling
190
Why use mats or cribbing?
To reduce ground pressure
191
What is the best procedure to follow when underground utilities may be present?
Contact controlling entity
192
Blocking on both sides of the pin connections is important because.....
It relieves the pressure from the pins and proper blocking is the safest way for dismantling a boom
193
What reference material would you refer to in determining the maximum boom length that may be cantilevered?
Manufacturers written procedure
194
When a properly rigged heavy load is lifted off the ground it will tend to what?
Swing out away from the crane
195
According to the B30.5 mobile crane standard it's okay for an operator to leave the cab of a crane with the engine running so long as:
The operator keeps the crane in View and restricts access to the area around the crane
196
According to OSHA, accessible areas of the operating crane must always be barricaded within what?
The swing radius of the rear of the rotating superstructure
197
What is the OSHA regulation governing cranes and construction?
1926.1400
198
According to OSHA 1926.1417(t) you should always have at least how many wraps on a hoist drum?
2
199
This indicates the length of the permanent part of the Boom, or as in some computerized systems, the length of the boom with extensions/attachments.
Boom length indicator
200
These devices restrict the boom from moving above a certain maximum angle in toppling over backward.
Boom stops
201
A welder who meets nationally recognized certification requirements applicable to the task being performed.
Certified welder
202
Someone who is capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them.
Competent person
203
An employer that is a prime contractor, General contractor, construction manager or any other legal entity which has the overall responsibility for the construction of the project
Controlling entity
204
A weight used to supplement the weight of equipment and providing stability for lifting loads by counterbalancing those loads
Counterweight
205
Equipment that has a type of Base mounting which incorporates a continuous belt of sprocket driven track
Crawler crane
206
A line of communication assigned by the employer who controls the communication system to only one signal person in Crane or Derek or to coordinated group of cranes or signal persons
Dedicated Channel
207
The area in which it is reasonably foreseeable that partially or completely suspended materials could fall in the event of an accident
Fall zone
208
The act of raising, lowering or otherwise moving a load in the air with equipment.
Hoisting
209
A system which aids the equipment operator by sensing the overturning moment on the equipment
Load moment indicator (LMI)
210
A lifting device incorporating a cable suspended lattice boom or hydraulic telescopic boom designed to be moved between operating locations by transport over the road.
Mobile crane
211
Devices that assist the operator in the safe operation of the crane by providing information or automatically taking control of a crane function
Operational aids
212
A device that provides a warning of proximity to a power line
Proximity alarm
213
A person who, by possession of a recognized degree, certificate, or professional standing, or who by extensive knowledge, training and experience, successfully demonstrated the ability to solve/resolve problems relating to the subject matter, the work, or the project
Qualified person
214
A condition in which a component that is uppermost on the Hoist line such as the load block, hook block, overhaul ball, or similar component, comes in contact with the boom tip, fixed upper block or similar component
Two blocking
215
The ability of the ground to support the equipment
Ground conditions
216
Working distance up to 50kV
10 ft
217
Working distance over 50 to 200kV
15 ft
218
Working distance over 200 to 350kV
20 ft
219
Working distance over 350 to 500kV
25 ft
220
Working distance over 500 to 750kV
35 ft
221
Working distance over 750 to 1,000kV
45 ft
222
Working distance over 1,000kV
As established by the utility owner/operator or register professional engineer who is a qualified person with respect to electrical power and distribution
223
What does S.W.L. stand for?
Safe Working Limit
