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HECA Mobile Crane > Core Review > Flashcards

Core Review Flashcards

1
Q

When lifting off the main boom, how is the effective weight of the fly/jib different in the erected position from that of the stowed position?

A

Effective weight increases. (p.13)

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2
Q

Who must determine maximum speed for a mobile crane to travel with a suspended load?

A

The competent person. (p.56)

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3
Q

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

A

Lower than the actual weight. (p.13)

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4
Q

Using a telescopic mobile crane and lifting off of the jib with the main boom partially extended, you should use ____ to determine gross capacity.

A

Boom angle.

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5
Q

If not listed in the load/capacity chart or notes for a telescopic boom crane and you are in between boom lengths, you should ______.

A

Use the lowest shorter or longer.

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6
Q

What is required to be on a mobile telescopic boom crane in order to lift a personnel platform?

A

Boom length indicator. (p.75)

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7
Q

When operating a rough terrain crane and extending the outrigger beams from the upper cab you should _____.

A

Make visual contact with beam and jack. (p.27)

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8
Q

When a mobile crane’s telescopic boom sections are required to be extended equally and they are not, the effect could be _________.

A

Damage to the longest extended section.

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9
Q

What item can be removed from a carry deck mobile crane and continue to be operational?

A

Jib/fly/extension. (p.62)

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10
Q

What is the primary reason for lifting off a boom extension mounted on a mobile telescopic boom crane?

A

Increase height. (p.62)

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11
Q

Traveling a rear engine mounted rough terrain mobile crane with a suspended load, you should position the load _______.

A

Over the front quadrant. (p.62)

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12
Q

A telescopic mobile crane is equipped with an anti two-block lock-out device. When the device is activated, which functions will be disabled?

A

Hoist, extend, and lower the boom. (p.18)

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13
Q

What device is NOT required on telescopic boom mobile cranes manufactured today?

A

Swing path monitor. (p.54)

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14
Q

Backward stability on a rough terrain mobile crane could be a problem when configured in which situation?

A

Over the side at a minimum radius. (p.59)

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15
Q

A telescopic boom mobile crane is going to lift a personnel platform. What is required to be operational on the crane?

A

Controlled load lowering. (p.75)

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16
Q

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

A

Long boom with minimum radius. (p.62)

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17
Q

According to OSHA, when is it safe to hoist loads with a mobile crane below energized power lines?

A

If fully extended, boom cannot reach the prohibited zone. (p.35)

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18
Q

A crane loses stability when its leverage on the load is _____.

A

Less than the load’s leverage on the crane. (p.62)

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19
Q

What is the design factor required when using non-rotating wire rope along and lifting personnel in a platform suspended from a mobile crane?

A

10 (p.77)

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20
Q

When should a tag line be used during the hoisting of material?

A

When the rotation of the load would be dangerous. (p.56)

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21
Q

When making a lift on outriggers, the maximum ground-bearing pressure occurs in which boom position?

A

Over the corner. (p.28)

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22
Q

A mobile crane’s jib is offset at 15 degrees versus its original 30 degree offset, but the boom angle remains unchanged. In this situation, the load radius would _____.

A

Decrease. (p.18)

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23
Q

Blocking or mats under the outrigger pads/float shall be ______.

A

able to sustain the load and maintain stability. (p.27)

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24
Q

When a telescopic boom extension is offset from the main boom, the crane’s capacity normally will be _____.

A

reduced. (p.18)

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25
Q

On mobile cranes, the boom angle indicator indicates what to the operator?

A

Angle of boom to horizontal. (p.17)

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26
Q

If working near power lines and using a tag line, which type of rope is least conductive to electricity?

A

Polypropylene. (p.33)

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27
Q

Which regulation governs the lifting of personnel with a mobile crane in construction?

A

OSHA 1926.1431

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28
Q

Backward stability of a mobile crane is tested in which configuration?

A

Basic boom at maximum angle with no load. (p.59)

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29
Q

On mobile truck cranes operating with outriggers retracted, the least stable position is when the boom is directly over the _____.

A

side. (p.62)

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30
Q

When a rough terrain crane is working on tires, backwards tipping is most likely to occur when lifting in which configuration?

A

Side quadrant at a short radius. (p.59)

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31
Q

When traveling a rough terrain mobile crane with a suspended load, what is the most important consideration?

A

Boom as low as possible with the load close to the surface. (p.62)

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32
Q

When retracting the boom on a telescopic mobile crane, the hook block and load will move in what direction?

A

Down. (p.62)

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33
Q

Rough terrain mobile crane capacities are generally greater over the _____.

A

front.

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34
Q

Mobile trick crane capacities are generally greater over the _____.

A

rear.

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35
Q

OSHA hand signal with both thumbs pointing outwards.

A

Extend boom. (p.72)

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36
Q

OSHA standard hand signal with both thumbs pointing inwards.

A

Retract boom. (p.72)

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37
Q

OSHA standard hand signal with thumb down a fingers flexing out/in.

A

Lower boom and raise load. (p.73)

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38
Q

OSHA standard hand signal with thumb up.

A

Raise boom. (p.72)

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39
Q

OSHA standard hand signal with palms moving out/in direction.

A

Wheel travel. (p.72)

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40
Q

OSHA standard hand signal with finger rotating and pointing up.

A

Hoist. (p.72)

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41
Q

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

A

Distribute the force over a larger area.

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42
Q

Where is the best location for leveling a crane?

A

Upperworks

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43
Q

Before leveling a mobile crane on outriggers, an operator should ensure _____.

A

there is no weight of the crane bearing on any tires.

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44
Q

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

A

Keeping a 90 degree angle between cylinder rod and pad.

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45
Q

When may blocking(cribbing) be placed under outrigger beams on mobile cranes?

A

Never approved.

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46
Q

Mobile cranes should be level to within what percent of grade?

A

1%

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47
Q

Timber crane mats work best when they are _____.

A

bolted together.

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48
Q

When arriving in the crane at the job site, the operator should first determine the condition of the _____.

A

access roads.

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49
Q

What surface would NOT be a good location for assembly or setup of a mobile crane?

A

Above underground vaults.

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50
Q

Each outrigger pad and its blocking should be sufficient to support _____.

A

the total weight of the crane and its load.

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51
Q

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

A

Introduces side load onto the boom.

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52
Q

When is the only time the outrigger beams should be less than fully extended?

A

The load chart indicates that this is allowed

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53
Q

What is the primary purpose for a rooster sheave or auxiliary boom point sheave?

A

Separate the load hoist lines.

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54
Q

Eccentric main boom tip reeving causes what?

A

Twisting of the main boom.

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55
Q

Which type of wire rope is installed on most cranes?

A

Right regular lay.

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56
Q

The hoist drum flange shall extend a minimum of _____ over the top layer of wire rope at all times while the crane is in operation.

A

1/2 inch

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57
Q

What is classified as a standing wire rope?

A

Pendant line.

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58
Q

When lifting on outriggers, the floats or pads should always be ______.

A

secured to the outrigger’s cylinder.

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59
Q

How many randomly broken wires in a lay length must there be in a mobile crane’s hoist line before it should be removed from service?

A

6.

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60
Q

What is the minimum design factor required for a right regular lay, boom or hoist wire rope?

A

3.5

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61
Q

On a mobile crane, how many broken wires are permitted at the end connection of a pendant line before it must be taken out of service?

A

1.

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62
Q

Type 1 rotation resistant hoist wire rope has a design factor of____.

A

5 to 1

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63
Q

It is important to know when lubricating crane hoist wire rope that the lubricant must _______.

A

not hinder visual inspection.

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64
Q

How often is the competent person required to inspect the running wire ropes on a mobile crane?

A

Each shift.

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65
Q

On mobile cranes, how many broken wires must be present in one strand of one lay for running wire rope to be removed from service?

A

3.

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66
Q

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

A

2 broken wires in 6 rope diameters.

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67
Q

According to OSHA, what is the minimum number of full wraps of wire rope that must remain on hoist drums in all service conditions?

A

2.

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68
Q

On whose recommendations should a mobile crane preventative maintenance program be developed?

A

Crane manufacturer.

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69
Q

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

A

center of rotation of the crane.

70
Q

On a mobile crane, should the load be applied when determining the proper hook angle?

A

Yes.

71
Q

On a mobile crane’s range diagram, boom length and boom angle can be used to determine ______.

A

Load radius.

72
Q

On a mobile crane, what is the weight of the stowed jib that is deducted in load chart calculations called?

A

Effective weight.

73
Q

When determining boom tip elevation for a mobile crane, the user could ____.

A

use the range diagram.

74
Q

The term net capacity is best defined by which term?

A

Gross capacity minus capacity deductions.

75
Q

When lifting off the main boom, how is the effective weight of the fly/jib different in the erected position from that of the stowed position?

A

Effective weight increases.

76
Q

Mobile cranes that are setup on barges shall have a list chart provided by which entity?

A

Manufacturer.

77
Q

When lifting loads on tires, mobile cranes are rated at what percentage of tipping?

A

75%.

78
Q

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

A

Lower than the actual weight.

79
Q

When load radius is between radii values, the operator must use the ____.

A

Longer radius.

80
Q

Why do most crane manufacturers reduce load capacity for duty cycle operations?

A

Side loading forces may occur.

81
Q

Why should only approved attachments or extra counterweights provided by the manufacturer be placed on the rear of the crane?

A

They could cause a backward stability problem.

82
Q

A mobile crane’s jib is offset 15 degrees versus its original 0 degree offset, but the boom angle remains unchanged. In this situation, the load radius _____.

A

increases.

83
Q

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

A

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

84
Q

How can the LMI’s boom length or load radius reading be verified?

A

Actual measurements.

85
Q

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

A

Angle of the boom to horizontal.

86
Q

What is the device called that automatically stops the boom when it nears the crane’s maximum angle?

A

Boom hoist limiting.

87
Q

When the number of layers of wire rope on a drum increases, the _____.

A

allowable line pull decreases.

88
Q

In a mobile crane, side loading of the boom could be caused by what?

A

Starting or stopping the swing too rapidly.

89
Q

Which person has the responsibility for determining the correct weight of a load?

A

Lift director.

90
Q

What must an operator do when an operator leaves the controls of the crane for an extended period of time?

A

Apply all brakes and dogs, and lower the load to the ground.

91
Q

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

A

Collapsing the boom.

92
Q

When should a tag line be used during the hoisting of material?

A

When the rotation of the load would be dangerous.

93
Q

What percentage of the rated capacity of a mobile crane must be used when lifting with two cranes attached to the same load?

A

75%

94
Q

When lifting a load with two mobile cranes, it is very important to ____.

A

keep the hoist lines of both cranes vertical.

95
Q

If lifting a load with two mobile cranes of different rated capacities, the crane with the larger rated capacity should _____.

A

be hooked at a distance closer the load’s center of gravity.

96
Q

When determining the position a mobile crane should be left in over night, with high winds in the forecast the operator should ______.

A

follow the manufacturer’s recommendations.

97
Q

When performing a multiple crane lift, it is important for the operators of each crane to understand that _____.

A

the weight may increase if the other crane lands the load.

98
Q

When lifting loads that are submerged under water with a mobile crane, what is one of the conditions that the operator should be familiar with?

A

Load will increase when lifting the load out of the water.

99
Q

When lifting over water with a personnel platform, what are the occupants of the platform required to wear?

A

Floatation device.

100
Q

If a mobile crane is NOT set up level and the operator swings the load from the high side to the low side, what effect will that have on the radius?

A

Radius will increase.

101
Q

Increasing the distance from the crane’s center of gravity to the tipping axis will have what effect on a mobile crane?

A

Increase stability.

102
Q

Backward stability of a mobile crane is tested in which configuration?

A

Basic boom at maximum angle with no load.

103
Q

What is the minimum pitch diameter used for sheaves in a boom hoist reeving system using rotation resistant wire rope?

A

Not less than 18 times rope diameter.

104
Q

When can capacity altering modifications be made to mobile cranes?

A

When permission is given by the crane manufacturer.

105
Q

A crane is at the point of instability when the crane’s leverage on the load equals _____.

A

100% of the load’s leverage on the crane.

106
Q

Who must determine maximum speed for a mobile crane to travel with a suspended load?

A

The competent person.

107
Q

Deflection of the boom while operating a mobile crane will increase ____.

A

load radius.

108
Q

A sudden start or stop of the hoisting function while operating a mobile crane can produce a ______.

A

dynamic load.

109
Q

When traveling with a suspended load on a mobile crane climbing an incline, the load should be carried in which direction?

A

Uphill.

110
Q

Which mobile crane boom configuration can cause the most hazardous side-loading for the crane?

A

Long boom with minimum radius.

111
Q

When preparing to hoist a load, the load block hook should be positioned _____.

A

directly above the load’s center of gravity.

112
Q

When making a lift on outriggers, the maximum ground-bearing pressure occurs in which boom position?

A

Over the corner.

113
Q

When personnel platforms are hoisted with a mobile crane, what item must be provided?

A

An anti two-block device.

114
Q

Personnel platforms suspended on the hook of a mobile crane must not exceed what percentage of a crane’s capacity at any given radius?

A

50%

115
Q

When proof testing a personnel platform to 125% of its rated capacity, how long must the platform be suspended?

A

5 minutes.

116
Q

What is the requirement for hooks used to hoist employees on a crane-supported personnel platform?

A

Hooks shall have a latch that closes and locks.

117
Q

OSHA permits hoisting of personnel by a crane as long as the employer can show ____.

A

there is no less hazardous or practical way.

118
Q

Before lifting an occupied personnel platform on a job site, the crew must ensure they perform ______.

A

pre-lift meeting, fully deploy all outriggers, and performs trial lift.

119
Q

Before lifting an occupied personnel platform on a job site you must _____.

A

use 50% of crane’s rated capacity, trial lift anticipated load weight, and ensure rigging is dedicated to platform only.

120
Q

Which of the following standards or regulations governs the lifting of personnel in construction?

A

OSHA 1926.1431

121
Q

According to OSHA 1926.1431, which device must be attached to the crane?

A

Anti two-block.

122
Q

According to OSHA 1926.1431, which hoist option is prohibited?

A

Hoist free fall.

123
Q

Inside the personnel platform, except for gates, how much of the perimeter must contain a grab rail for the occupants?

A

100 percent.

124
Q

According to OSHA 1926.1431, during personnel platform hoisting operations, access gates should not swing in which direction?

A

Outward.

125
Q

OSHA 1926.1431 states that tag lines must be used ______.

A

when necessary to control the platform.

126
Q

According to OSHA 1926.1431, while hoisting a personnel platform, what weather condition will prompt discontinue the operation?

A

Dangerous.

127
Q

While hoisting employees in a personnel platform, direct communication must be maintained between the signal person and who?

A

Operator.

128
Q

According to OSHA 1926.1431, at what wind speed must a qualified person be consulted?

A

20 mph.

129
Q

If working near power lines and using a tag line, which type of rope is least conductive to electricity?

A

Polypropylene.

130
Q

When working near power lines with a mobile crane, where does OSHA require caution stickers be installed on all equipment?

A

At operator’s station and 2 on the outside of the equipment.

131
Q

According to OSHA table T, what is the minimum clearance for 133kV power lines?

A

10’

132
Q

According to OSHA, when working near power lines, when is a dedicated spotter required?

A

When crane operator is unable to see the warning line of signs.

133
Q

According to OSHA’s table T, what clearance should a mobile crane IN TRANSIT keep while going under 445kV lines?

A

16’

134
Q

According to OSHA, when is it safe to hoist loads with a mobile crane below energized power lines?

A

When the fully extended boom can’t reach the prohibited zone.

135
Q

According to OSHA 1926.1408, when operating near high voltage power lines, what clearance shall be required when the rating of the lines is 275kV?

A

20’ w/encroachment precautions.

136
Q

According to OSHA 1926.1411, when you encounter power lines with a voltage of 44kV and the crane is TRAVELING, according to Table T, what is the minimum required clearance?

A

6’

137
Q

According to OSHA 1926.1408, the minimum clearance between any part of the crane and power lines rated 50kV or below shall be ______.

A

10’ w/encroachment precautions.

138
Q

According to OSHA 1926.1408, for power lines rated 100 kV, the minimum clearance between the crane and any lines shall be ______.

A

15’ w/encroachment precautions.

139
Q

The term “jib offset” can be expressed as the jib angle to which mobile crane component?

A

Boom.

140
Q

On a mobile crane, the term “parts of line” refers to which item?

A

The number of lines running through the load block and boom point sheaves.

141
Q

According to OSHA, mobile crane load block hooks must not have a twist in excess of _____.

A

0 degrees.

142
Q

According to OSHA, mobile crane load block hooks must not have a throat opening in excess of ______.

A

5% of its original size.

143
Q

What is the design factor for grade 80 chain slings?

A

4.

144
Q

What grade alloy steel chain should be used for hoisting slings?

A

80.

145
Q

Loads rigged using a basket hitch should be ____ to prevent slippage.

A

balanced

146
Q

When slings encounter sharp edges on loads to be lifted, riggers shall ensure that slings are ______.

A

protected or padded.

147
Q

According to OSHA, quadruple sling bridle ratings are the same as ____.

A

triple sling bridle ratings.

148
Q

When correctly installing U-bolt type wire rope clips, the U portion of the clip shall be on ______.

A

the dead or short end.

149
Q

True or False. As horizontal load angle decreases, stress increases.

A

True.

150
Q

The approximate percentage of strength of choker, vertical, and basket hitches respectively are _____.

A

75%, 100%, 200%.

151
Q

According to ASME, what shall NOT be used for the suspension system on suspended personnel platforms?

A

Synthetic web bridle.

152
Q

When rigging a bundle of pipe or tubing, what would provide the best contact between sling and load?

A

Double wrap choker.

153
Q

What is the angle between the top of the load and the sling leg referred to in sling load charts?

A

Horizontal sling angle.

154
Q

When installing a wedge socket, it must be attached with the load line pulling in a straight line from the ____.

A

pin.

155
Q

For any signal other than emergency stop, who is permitted to give hand signals to the crane operator during a lift?

A

A qualified signal person.

156
Q

OSHA Standard Method Hand Signal with upward rotating finger below palm.

A

Move slowly.

157
Q

OSHA hand signal with fist above elbow over palm.

A

Use whipline.

158
Q

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

A

Function and direction.

159
Q

According to OSHA, each series of voice signals contain how many elements?

A

Three.

160
Q

OSHA hand signal with finger rotating pointing down.

A

Lower.

161
Q

OSHA hand signal with arm out and palm down.

A

Swing.

162
Q

OSHA hand signal with both arms moving in/out horizontally.

A

Emergency stop.

163
Q

OSHA hand signal with both hands holding opposite forearm.

A

Dog everything.

164
Q

OSHA hand signal with one arm moving in/out horizontally.

A

Stop.

165
Q

When directing a crane using voice signals, the transmission must be through a channel that is _____.

A

dedicated.

166
Q

Before commencing lifting operations, the operator and signal person must contact and identify each other when using which form of communication?

A

Voice signals.

167
Q

According to OSHA, where must a signal chart be posted?

A

On the equipment or in the area of the hoisting operation.

168
Q

How many audible travel signals are there?

A

3.

169
Q

OSHA hand signal with fist on top of head.

A

Use main hoist.

170
Q

OSHA hand signal with thumb pointing outwards while other hand holds tag line.

A

Extend boom.

HECA Mobile Crane (6 decks)

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