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CCO > CCO > Flashcards

CCO Flashcards

1
Q

Where is the best location for leveling a crane?

A

Upperworks

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2
Q

What is the best method for determining gross load?

A

Get an accurate load weight and add the rigging

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3
Q

By order of hitch strength, which is the correct order?

A

Basket , vertical, choker

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4
Q

What is the purpose of using a jib?

A

Increase height

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5
Q

When taking a side strain on a boom, what concerns the operator the most?

A

Boom damage

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6
Q

You should always have at least how many wraps on a hoist drum?

A

Two

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7
Q

On a load chart, values above the bold line mean

A

Capacities based on structural competence

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8
Q

The primary purpose for a rooster sheave or auxiliary boom point sheave is to?

A

Separate the hoist lines

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9
Q

When the number of layers of rope on a drum increases the….

A

Line pull decreases

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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

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11
Q

The term upperworks or superstructure refer to the area of the crane…..

A

Above the turntable

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12
Q

Side loading may be caused by?

A

Starting or stopping the swing to rapidly

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13
Q

What is the best procedure to follow when underground utilities may be present?

A

Get information from the controlling entity

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14
Q

Eccentric main boom tip reeving causes…..

A

Torsion or twisting of the boom

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15
Q

How many randomly broken wires must there be to remove a 6x25 running wire rope from service?

A

6

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16
Q

When lifting Personnel in a man basket using 6x19 wire rope, the minimum safety Factor is?

A

7

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17
Q

What is the Safety Factor required when using non-rotating wire rope and lifting personnel in a man basket?

A

10:1

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18
Q

Who has the responsibility to verify that the load is within the rated capacity of the equipment?

A

Operator

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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

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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

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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

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22
Q

During setup, how do you determine machine clearances (counterweight, boom, outriggers)?

A

Measure for correct distance

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23
Q

When operating a crawler crane, what is the most unstable allowable quadrant of operation?

A

Side

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24
Q

When operating a truck crane, what is the most unstable allowable quadrant of operation?

A

Side

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25
Q

When should a tagline be used?

A

When rotation of load would be dangerous

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26
Q

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?

A

Lift the load off the ground a few inches and apply the brake

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27
Q

What is the difference between an anti-two-block warning device and an anti-two-block prevention system?

A

A warning device warns you, a prevention system stops the function

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28
Q

Who gives the operator hand signals?

A

The qualified person assigned prior to the lift

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29
Q

Why use mats or cribbing?

A

To reduce ground pressure

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30
Q

Tipping capacities of crawler cranes are based on what percentage of tipping?

A

75%

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31
Q

Should the load be applied when determining the proper boom angle?

A

Yes

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32
Q

When should the operator use the “Run by the seat of your pants” technique?

A

Never

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33
Q

Load radius is the distance from the center of gravity of the suspended load to the…..

A

Center of rotation

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34
Q

What is the primary reason for using a boom extension?

A

Increase height

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35
Q

What is the minimum design factor required for 6x25 right regular lay running rope?

A

3.5

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36
Q

On cranes with individually controlled power boom sections, unless otherwise specified, the sections must be extended how?

A

All sections should be telescoped equally

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37
Q

How does the operator determine if the correct load chart is being used?

A

Matching serial numbers

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38
Q

What is net capacity?

A

Gross capacity minus deductions

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39
Q

If the SWL (safe working limit) of a cranes wire rope is 10,000lbs using one part, what is the SWL using four parts?

A

40,000lbs

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40
Q

When first arriving on the job site, the operator should first determine the condition of the…..

A

Access road

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41
Q

How does the operator verify the LMI’s boom length or load radius reading?

A

Actual measurements

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42
Q

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:

A

Structural competence

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43
Q

How many broken wires must be present in one strand of one lay for 6x37 running wire rope to be removed from service?

A

3

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44
Q

In a range diagram, boom length and angle can be used to determine approximately what?

A

Load radius

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45
Q

What is the best type of tagline to use around power lines?

A

Dry polypropylene

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46
Q

When making a multiple crane lift, what is important for the operator to understand?

A

The weight may increase if the other crane lands the load first

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47
Q

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…..

A

Increase

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48
Q

Most crane manufacturers reduce load capacity for duty cycle operations because…..

A

Side loading forces may occur

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49
Q

On whose recommendations should a preventative maintenance program be set up?

A

Crane manufacturer

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50
Q

What is the standard rope used on most cranes?

A

Right regular lay

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51
Q

What is the proper way to calibrate a boom angle indicator?

A

Using a level, raise or lower the boom to horizontal and set the indicator at 0°

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52
Q

The red area of an instrument gauge means?

A

A dangerous condition exists

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53
Q

The best way to keep people from being injured from the counterweight of the crane is to:

A

Erect and maintain control lines

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54
Q

Only approved attachments or extra counterweights made by the manufacturer should be placed on the rear of the crane because…..

A

They could cause a backward stability problem

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55
Q

What’s the first thing an operator should do before going under a low pipe rack?

A

Post a signal person to check clearance

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56
Q

When working on outriggers, the only time they should be less than fully extended is when…..

A

There is a load chart for this operation

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57
Q

When lifting loads from the water, what should the operator be aware of?

A

The load will increase when you pick the load from the water

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58
Q

What is required on a hydraulic crane in order to attach and use a Personnel platform?

A

Boom length indicator

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59
Q

When working on rubber, cranes are rated at what percentage of tipping?

A

75%

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60
Q

What is the backward stability of a crane is tested with?

A

Basic boom at maximum angle with no load

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61
Q

For main boom capacities when either boom length or radius are between values listed, you should:

A

Use the next longer or shorter boom length, whichever is the least capacity

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62
Q

When a spinning load presents a danger, the operator should:

A

Use a tagline

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63
Q

The jib capacity is 8 tons and the ball weighs 900 lbs. What is the heaviest load that can be lifted safely?

A

15,100 lbs

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64
Q

What do “Parts of Line” mean?

A

The number of lines running through the load block

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65
Q

If a jib is erected but not being used, it is treated as a deduction from the cranes what?

A

Gross capacity

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66
Q

What is the maximum number of broken wires acceptable before replacement on a standing wire rope?

A

2

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67
Q

What are most jib capacities based on?

A

Structural capacity

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68
Q

On the majority of conventional cranes, power is transferred to the torque converter by a…..

A

Master clutch

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69
Q

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?

A

The bottom pins ahead of the cantilever point

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70
Q

When using load/capacity charts, what does the term “Jib Angle to Ground” refer to?

A

Main boom angle minus the jibs offset

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71
Q

A truck crane, without riggers properly set, is rated at what percentage of its tipping capacity?

A

85%

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72
Q

On a truck crane with outriggers extended and set, and tires touching the ground, the operator should refer to what load chart?

A

On rubber chart

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73
Q

When testing a Personnel platform, how long must the proof test be maintained?

A

5 minutes

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74
Q

What is the minimum pitch diameter for load block sheaves?

A

Not less than 16 times rope diameter

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75
Q

Power is transferred to the swing through a…..

A

Pinion gear

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76
Q

LMI’s shall be installed on cranes with a lifting capacity of…..

A

3 ton and above

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77
Q

When lifting personnel, the cranes hook must be the type that…..

A

Can be closed and locked

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78
Q

What is the maximum advisable wind speed for Crane operation?

A

Follow manufacturer’s recommendations

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79
Q

When working near power lines, where should Hazard stickers be installed?

A

In the operator’s cab, and at least two on the outside of the crane

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80
Q

For jib backlash, how much is allowed?

A

5 degrees

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81
Q

Cranes must be level within what percentage?

A

1%

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82
Q

According to ASME B30.5, a frequent inspection is:

A

Daily to monthly

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83
Q

According to ASME B30.5, a periodic inspection is:

A

Monthly to annually

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84
Q

Test loads shall not exceed ______ of manufacturer’s load ratings

A

100%

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85
Q

According to OSHA, how often should a daily inspection be performed

A

Each shift

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86
Q

According to OSHA, cranes lifting Personnel platforms must have an inspection performed each:

A

Shift and after the trial lift

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87
Q

Crane hooks must not be twisted in excess of:

A

Any visibly apparent bend or twist from the plane of the unbent hook

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88
Q

Crane hooks throat opening must not exceed:

A

5% of its original size - not to exceed 1/4 in

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89
Q

What is the jib offset?

A

Jib angle to the Boom

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90
Q

The crane is out of level, you release a swing break, the boom swings downhill, what happens to your radius?

A

Load radius increases

91
Q

Blocking can be placed under the ends of the tracks to…..

A

Increase the cranes stability when operating over the front or back

92
Q

What quadrant produces the least amount of ground pressure on a lattice crawler?

A

Side

93
Q

On lattice boom cranes fitted with power load lowering, a heavy load should be lowered by using the:

A

Power load lowering feature and the foot brake

94
Q

Abruptly stopping a rapid swing on a long boom mobile crane will produce what major effect?

A

Overturning the crane or collapsing the boom

95
Q

When the boom control lever is moved to the center position, which action should be expected?

A

The boom hoist will be held stationary

96
Q

On a lattice boom crawler crane, where is the main boom length measured from?

A

Center of the boom heel pins to the center of the boom tip sheave

97
Q

If you can’t level your crawler crane:

A

Don’t operate the crane

98
Q

What effect does retracted side frames have on a crawler crane?

A

Decrease in capacity

99
Q

If your crawler crane is on a barge, it is necessary to:

A

Secure the crane to the barge

100
Q

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?

A

Lower connection pins, located ahead of the equalizer

101
Q

When using a mobile crane on a barge, the cranes load capacity chart shall be:

A

Replaced by a list chart

102
Q

How many broken wires are permitted at the end connection of a pendant before it must be taken out of service?

A

1

103
Q

If high winds are expected and the lattice boom crane must be secured pointing into the wind, then the hook should be……

A

Secured to a solid structure directly below the boom point

104
Q

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?

A

Shortest section

105
Q

During assembly where should you attach synthetic slings to lift boom sections?

A

Main chords

106
Q

Which boom configuration can cause the most hazardous boom side loading condition?

A

Long boom with minimum radius

107
Q

When is it safe to handle loads under power lines?

A

The load nor any part of the crane can come closer than regulations allow

108
Q

On a lattice boom truck crane, boom angle is measured between the center line of the:

A

Loaded boom and the horizontal

109
Q

When a lattice boom truck crane is lifting on outriggers, the floats or pads should always be:

A

Secured to the Outriggers

110
Q

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?

A

Cantilever length

111
Q

When lattice boom is being disassembled or shortened, it is extremely important to:

A

Never touch any pin on any boom section located between the pendant attachment points and the crane

112
Q

When installing a pin-connected lattice boom on a crawler crane you should always:

A

Use the boom hoist pawl to hold the boom

113
Q

When you change the jib to ground angle from 40° to 30°, you have:

A

Decreased the capacity of the jib

114
Q

A truck crane operating with Outriggers fully extended and set, does not have a fifth front outrigger, the operator should:

A

Refer to the manufacturer’s working area diagram

115
Q

A lattice boom truck crane, when set up out of level, will lose the most capacity with?

A

Long boom; short radius

116
Q

What is the device that automatically stops the boom when it nears the maximum angle?

A

Boom hoist kick-out

117
Q

When a lattice boom truck crane is operating on properly set outriggers, the tipping axis is located at the:

A

Point where the Outriggers touch the ground

118
Q

What is the purpose of placing mats or cribbing under outrigger floats?

A

Distribute the downward force of the float over a larger area

119
Q

Each outrigger pad and it’s blocking should be a sufficient support:

A

The total weight of the crane and its load

120
Q

How does high wind affect the setup of a crane with a long boom?

A

Introduces sideload onto the boom

121
Q

When Personnel platforms are lifted with a telescopic crane:

A

A two block damage prevention system is to be provided

122
Q

A telescopic crane is equipped with an anti-2 block lockout device. When the device is activated which functions should be disabled?

A

Hoist up, extend out and lower the boom

123
Q

What should you do when transporting a load on a carry deck?

A

Center the load on the deck of the crane

124
Q

Jib capacities are based on what?

A

Structural strength

125
Q

When making a lift on outriggers, where does the maximum ground bearing pressure occur?

A

Over the corner

126
Q

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?

A

Increase

127
Q

Blocking which is not tightly placed may fail at what percentage?

A

50% of design

128
Q

If the jib is offset, the cranes capacity will:

A

Be reduced

129
Q

What is the safest speed for a crane carrying a load?

A

The manufacturer’s speed limit

130
Q

What does the boom angle indicator indicate?

A

Angle of boom to horizontal

131
Q

When performing a pick and carry lift with a rough terrain hydraulic crane, what is the most important consideration?

A

Keeping the boom as low as possible with the load close to the ground

132
Q

Jib offset is the jib angle to the what?

A

Boom

133
Q

When should all hazards and problems that are found on the work site be identified?

A

At the pre-operational work site inspection

134
Q

Which OSHA regulation govern suspended personnel platforms?

A

OSHA 1926.1431

135
Q

According to ASME B30.5, what is the prohibited zone for power lines that are 210kV

A

20 ft

136
Q

According to ASME B30.5, you are required to pass a physical exam every ______ years

A

3 years

137
Q

According to OSHA, when operating a mobile crane, when should you inspect your running wire rope?

A

Each shift

138
Q

What is important when lifting a load with more than one crane?

A

Keep the hoist lines of both cranes vertical

139
Q

Rotation resistant wire rope has a design factor of what?

A

5:1

140
Q

What is line pull?

A

The amount of weight a drum will hoist for a given layer

141
Q

How is boom length measured?

A

Center of the foot pins to the center of the head sheave pins

142
Q

What is the weight called of the stowed jib used in the load calculation?

A

Effective weight

143
Q

What is a Crane’s rated capacity based on?

A

Structural and stability

144
Q

What is the design factor for the rigging hardware when lifting a suspended Personnel platform?

A

5

145
Q

If using cranes of different rated capacities, the crane with the larger rate of capacity should:

A

Be hooked a distance closer to the loads center of gravity

146
Q

Hoist ropes that are not rotation resistant must have a design factor of:

A

3.5 to 1

147
Q

Backward stability of an RT crane could be a problem when the crane is working:

A

Over the side at a minimum radius

148
Q

It is important to inspect rotation resistant wire rope more frequently because:

A

Internal damage will occur more frequently

149
Q

What’s important to know when lubricating wire rope with a lubricant?

A

Not to hinder visual inspection

150
Q

Breaking strength divided by the design factor equals:

A

Working load limit

151
Q

What is the best way to determine boom tip elevation?

A

Use the range diagram

152
Q

When determining what position to dog the machine overnight and high winds are expected:

A

Follow the manufacturer’s recommendations

153
Q

When a crane is in transit and you are required to travel under a 50kV power line, what is OSHA’s minimum required clearance?

A

6 ft

154
Q

When do timber mats work best?

A

When they’re bolted together

155
Q

When is the only time an employer may use a suspended personal platform?

A

When there is no other safer way

156
Q

What is the greatest cause of ground personnel deaths?

A

Electrocution

157
Q

When lifting a suspended personal platform, the cranes capacity must not exceed what percent of the rated capacity?

A

50%

158
Q

What will boom deflection do?

A

Increase load radius

159
Q

What’s the effect of a load leverage being greater than the cranes leverage?

A

Instability

160
Q

Blocking under the Outrigger pads/floats shall be:

A

Sufficient to support the crane and the load

161
Q

With a pick and carry operation, the rated tipping capacity is based on what percentage of the total tipping capacity?

A

75%

162
Q

What must all telescopic boom cranes be equipped with?

A

Boom angle indicators

163
Q

When setting up a crane on uneven ground how should you block?

A

Block under the pad and keep 90° angle between the cylinder rod and the pad

164
Q

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:

A

Different depending on the crane manufacturers definitions and determination

165
Q

Performing a pick and carry operation with a rough terrain crane you should keep the load where?

A

Positioned over the front of the carrier

166
Q

When a cranes hydraulic boom sections are required to be extended equally, and they are not, the:

A

Longest section can be damaged

167
Q

What is required on a telescopic crane going to lift a Personnel platform?

A

Boom length indicator

168
Q

What must the operator do when hoisting a load that is 90% or more of the maximum line pull?

A

Test the Hoist brakes by lifting the load a few inches and applying brakes

169
Q

What is a stationary load?

A

Static

170
Q

What should you do when operating an RT Crane and extending the Outriggers from the upper?

A

Make visual contact or post a spotter

171
Q

What happens to the effective weight of the jib when erected from the stowed position?

A

Increases

172
Q

What quadrant will exert the most ground pressure when swinging the load of any crane on Crawlers?

A

Corner

173
Q

How does the effective weight of a stowed jib/extension relate to the actual weight of the jib/extension?

A

Lower than the actual weight

174
Q

When proof testing a personnel platform the operator must load it to 125% of its rate of capacity and hold it for how long?

A

5 minutes

175
Q

When operating a crane on a barge, who must provide the list chart?

A

The manufacturer

176
Q

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:

A

Use the on rubber load chart

177
Q

According to OSHA, which hand signal examples must be used to Signal cranes?

A

OSHA 1926.1400 appendix A

178
Q

Who gives the operator hand signals?

A

The qualified person on the job site

179
Q

Any direction given to the crane operator by the signal person shall be given from The Operators what?

A

Perspective

180
Q

What is the first element of voice signals given to a crane operator prior to the lift?

A

Function and direction

181
Q

OSHA’s definition of new signals are located where?

A

OSHA 1926.1419(d)

182
Q

How should the blocking be under a mobile crane Outrigger?

A

Parallel and tightly spaced

183
Q

What percentage of mobile crane accidents is caused by improper crane setup?

A

Over 50%

184
Q

What condition causes the lifting capacity to be most affected when a mobile crane is out of level?

A

Long boom, minimum radius

185
Q

What is the minimum recommended swing clearance for a mobile crane?

A

2 ft

186
Q

Where is the best location for leveling a crane?

A

Upperworks

187
Q

What is the best place to lift from when lifting boom sections for assembly or disassembly?

A

Chords

188
Q

It is recommended to lift boom sections with which type of rigging?

A

Synthetic web slings

189
Q

When are most lattice boom sections damaged?

A

Transport and handling

190
Q

Why use mats or cribbing?

A

To reduce ground pressure

191
Q

What is the best procedure to follow when underground utilities may be present?

A

Contact controlling entity

192
Q

Blocking on both sides of the pin connections is important because…..

A

It relieves the pressure from the pins and proper blocking is the safest way for dismantling a boom

193
Q

What reference material would you refer to in determining the maximum boom length that may be cantilevered?

A

Manufacturers written procedure

194
Q

When a properly rigged heavy load is lifted off the ground it will tend to what?

A

Swing out away from the crane

195
Q

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:

A

The operator keeps the crane in View and restricts access to the area around the crane

196
Q

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

A

The swing radius of the rear of the rotating superstructure

197
Q

What is the OSHA regulation governing cranes and construction?

A

1926.1400

198
Q

According to OSHA 1926.1417(t) you should always have at least how many wraps on a hoist drum?

A

2

199
Q

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.

A

Boom length indicator

200
Q

These devices restrict the boom from moving above a certain maximum angle in toppling over backward.

A

Boom stops

201
Q

A welder who meets nationally recognized certification requirements applicable to the task being performed.

A

Certified welder

202
Q

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.

A

Competent person

203
Q

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

A

Controlling entity

204
Q

A weight used to supplement the weight of equipment and providing stability for lifting loads by counterbalancing those loads

A

Counterweight

205
Q

Equipment that has a type of Base mounting which incorporates a continuous belt of sprocket driven track

A

Crawler crane

206
Q

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

A

Dedicated Channel

207
Q

The area in which it is reasonably foreseeable that partially or completely suspended materials could fall in the event of an accident

A

Fall zone

208
Q

The act of raising, lowering or otherwise moving a load in the air with equipment.

A

Hoisting

209
Q

A system which aids the equipment operator by sensing the overturning moment on the equipment

A

Load moment indicator (LMI)

210
Q

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.

A

Mobile crane

211
Q

Devices that assist the operator in the safe operation of the crane by providing information or automatically taking control of a crane function

A

Operational aids

212
Q

A device that provides a warning of proximity to a power line

A

Proximity alarm

213
Q

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

A

Qualified person

214
Q

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

A

Two blocking

215
Q

The ability of the ground to support the equipment

A

Ground conditions

216
Q

Working distance up to 50kV

A

10 ft

217
Q

Working distance over 50 to 200kV

A

15 ft

218
Q

Working distance over 200 to 350kV

A

20 ft

219
Q

Working distance over 350 to 500kV

A

25 ft

220
Q

Working distance over 500 to 750kV

A

35 ft

221
Q

Working distance over 750 to 1,000kV

A

45 ft

222
Q

Working distance over 1,000kV

A

As established by the utility owner/operator or register professional engineer who is a qualified person with respect to electrical power and distribution

223
Q

What does S.W.L. stand for?

A

Safe Working Limit

CCO (2 decks)

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