Crane Safety Practice Test

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Questions and Answers

When rotation of the load may be hazardous, what must the operator ensure?

ensure a tag line is used

Which of the following could be the most dangerous when working near a newly constructed building?

Effective signage

Stable foundations

Un-compacted soil covering underground utilities (correct)

Clear site markings

The main reason for using timber blocking under the crane's outriggers is to?

decrease the applied ground pressure

Who is responsible for conducting an inspection during each shift?

competent person Signup and view all the answers

What should you use to protect slings from a sharp edge?

split pipe sections Signup and view all the answers

Considering the wire rope on a crane, which of the following is prohibited by OSHA?

Splicing Signup and view all the answers

A crane operator is required to have a physical every?

3 years Signup and view all the answers

To provide better protection between the crane and any obstacle, barriers must be erected in what part of the crane's work area?

accessible areas within the rotating superstructure Signup and view all the answers

An example of duty cycle operations would be?

handling large volumes of concrete Signup and view all the answers

The term that defines the load plus all rigging components is?

gross load Signup and view all the answers

When a heavy load is lifted, what is the result?

increased boom deflection Signup and view all the answers

What site conditions must an operator be concerned about prior to setting up a crane?

access roads have a less than 5% grade Signup and view all the answers

Which of the following states the requirements for hooks used to hoist personnel on a crane supported personnel platform?

hooks shall be the type that can be pinned and locked Signup and view all the answers

A load applied at an angle to the vertical plane of the boom is called?

side loading Signup and view all the answers

A mobile crane's rate capacity, as listed in the load chart, is either based on either structural limits or?

stability Signup and view all the answers

When a measured radius falls between values listed in a load chart, what should you do?

use the gross capacity for the longer radius listed in the load chart Signup and view all the answers

A crane's net capacity is equal to?

the manufacturer's load rating less all deductions Signup and view all the answers

The superstructure of a crane is?

the entire upper works above the swing circle Signup and view all the answers

When blocking is used under the floats/pads to support the crane, the blocking/cribbing must be?

greater than the float/pad surface area Signup and view all the answers

If the operator must leave the crane when in contact with energized lines, they should?

avoid simultaneous contact with the crane and the ground Signup and view all the answers

What is a part of the crane inspection?

documented rope inspection Signup and view all the answers

How often is a competent person required to visually inspect the running rope on a crane?

once each shift Signup and view all the answers

Cranes with a suspended load generate the highest ground pressure when working over the?

corner Signup and view all the answers

An auxiliary boom head is intended to be used with?

a whip line Signup and view all the answers

When calculating net capacities, in most cases, a stowed jim is treated as?

a deduction Signup and view all the answers

Excessive side loading of the boom could be caused by?

dragging a load Signup and view all the answers

Which is the most important factor about site access?

compaction of approach roads Signup and view all the answers

Power lines below 350 kV, what is the minimum clearance distance required?

20' Signup and view all the answers

As rope spools onto the hoist drum of a crane and the layers increase, available line pull will?

decrease Signup and view all the answers

If the capacity of a synthetic sling is not legible on the sling, the user should?

not use the sling Signup and view all the answers

For cranes using outriggers fully extended, tipping capacity is based on?

85% Signup and view all the answers

The majority of ground crew deaths are related to?

energized power line contact Signup and view all the answers

The total weight of a load personnel platform and related rigging should not exceed what percent of the related capacity for the radius and configuration of a crane?

50% Signup and view all the answers

A body harness system shall be attached to the personnel platform except which working condition?

over water Signup and view all the answers

On what principle is crane strength based?

leverage Signup and view all the answers

The weight of load handling devices, such as load blocks, sling, ropes, shall be?

considered part of the load Signup and view all the answers

Jib offset can be expressed as the jib angle to the?

boom Signup and view all the answers

When can capacity-altering modifications be made to a crane?

when written permission is given by the crane manufacturer Signup and view all the answers

Wire rope lubricant should not?

hinder visual inspection Signup and view all the answers

How many broken wires are permitted at the end connection of standing wire rope?

1 Signup and view all the answers

When employees are engaged in hooking, unhooking, and guiding the load in the fall zone, what type of hook must be used?

hooks with self-closing latch Signup and view all the answers

The work area diagram is used to?

identify the operational quadrants Signup and view all the answers

Which of the following indicates core failure in rotation-resistant rope?

deduct the effective weight of the jib Signup and view all the answers

One purpose of a load indicator is to?

warn the operator of an overload condition Signup and view all the answers

Which of the following are not allowed within the fall zone?

Qualified evaluator Signup and view all the answers

What may be required when traveling a crane on a job site under or near power lines with no load?

a dedicated spotter Signup and view all the answers

All the cranes involved in a multiple crane lift shall?

be leveled properly Signup and view all the answers

All of the following can cause a two-blocking condition except?

Raising the boom Signup and view all the answers

Rapid hoist acceleration?

produces hook loads higher than the actual weight Signup and view all the answers

Rigging equipment must be inspected?

prior to use Signup and view all the answers

Two audible signals made by a crane operator mean?

go forward Signup and view all the answers

When is the hoist line on the topside of the boom figured as part of the load?

it is never figured in Signup and view all the answers

A monthly inspection includes?

a comprehensive inspection Signup and view all the answers

Drum rotation indicators in a crane will tell the operator?

direction and speed of the hoist drum Signup and view all the answers

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

polypropylene rope Signup and view all the answers

The rated lifting capacities listed in the crane's load chart less all deductions is?

net capacity Signup and view all the answers

How many random broken ropes are required for replacement?

2 broken wires in 6 rope diameters Signup and view all the answers

The best way to determine the weight of the load is to?

have a certified load weight and add in the weight of all rigging Signup and view all the answers

The lifting capacities listed in the load chart assume that?

the lift is to be performed under ideal conditions Signup and view all the answers

The capacity of a vertical hitch is?

greater than a choker hitch Signup and view all the answers

The best way to ensure that timber mats work as a unit is to secure them with?

bolts Signup and view all the answers

What would be evident in the appearance of rotation-resistant rope if core failure is suspected?

localized reduction in diameter Signup and view all the answers

Minimum clearance of energized lines at 40 kV?

6 feet Signup and view all the answers

A regular lay running rope should be replaced when it has?

3 broken wires or more in a strand in a lay Signup and view all the answers

A crane's net capacity is the?

manufacturer's load rating minus all deductions Signup and view all the answers

What percent shall personnel platforms be tested at?

125% Signup and view all the answers

The bold line used on a capacity chart, the capacities above the bold line are based on?

75% of structural strength Signup and view all the answers

Improper cribbing of outriggers includes?

solid cribbing under beams Signup and view all the answers

What does a load indicator measure?

the max load that can be lifted Signup and view all the answers

What effect does loosely spaced cribbing have on outrigger floats/pads?

decrease strength and stability Signup and view all the answers

Who on site is responsible for the assembly or disassembly of a crane?

A & D director Signup and view all the answers

Who is responsible for determining that the power lines are de-energized?

controlling entity Signup and view all the answers

Slings picked for assembly/disassembly of a crane should be?

synthetic slings Signup and view all the answers

Min sheave size required for lower load blocks using wire rope?

16 times the diameter of the wire rope used Signup and view all the answers

When lifting over a corner, ground pressure generated by a crane can approach a weight that is?

equal to the weight of the crane and the suspended load Signup and view all the answers

When traveling with a suspended load, the boom should be?

lowered boomed down as low as possible Signup and view all the answers

Dynamic motion such as swing with a load can cause what?

increased load weight Signup and view all the answers

Study Notes

Crane Operations Safety and Procedures

Tag lines are essential to prevent hazardous load rotations during lifting operations.
Un-compacted soil over underground utilities poses significant dangers near newly constructed buildings.

Crane Setup and Capacity

Timber blocking under crane outriggers reduces ground pressure.
A competent person is responsible for conducting inspections each shift to ensure safety.
Split pipe sections protect slings from sharp edges when rigging loads.
Splicing wire ropes on cranes is prohibited by OSHA regulations.
Operators are required to undergo physical examinations every three years to maintain health standards.

Worksite Conditions

Access roads should maintain a grade of less than 5%.
Elevated work areas require barriers in accessible areas of the crane’s rotating superstructure.
Cranes should have adequate compaction of approach roads for safe access.

Load Management

Gross load includes the weight of the load and all rigging components.
Side loading refers to loads applied at angles to the vertical boom.
An auxiliary boom head is designed specifically for whip lines.
The net capacity of a crane is determined by the manufacturer's load rating minus all deductions, including stowed jibs treated as deductions.

Inspections and Maintenance

Regular visual inspections of running ropes are mandated to occur each shift by a competent person.
Documented rope inspections are part of the overall crane inspection protocol.
A monthly crane inspection must involve a comprehensive evaluation of all components.

Safety Protocols

Workers must avoid making simultaneous contact with energized lines and the ground.
Self-closing latch hooks are required when personnel are involved in load operations.
Loose cribbing under floats/pads reduces strength and stability.

Lifting Operations

The maximum weight limit for personnel platforms is set at 50% of the crane's rated capacity.
Hooks with two audible signals indicate a command to move forward.
A dedicated spotter may be required when traveling a crane under power lines.

Rigging and Sling Use

Synthetic slings are preferred for assembling or disassembling cranes.
The minimum clearance from energized lines is six feet at 40 kV.
When using poly ropes, they are less conductive, providing an extra safety measure near electrical lines.

Operational Factors and Limitations

Overloading conditions can be indicated by a load indicator, which warns operators.
Excessive side loading can occur from dragging loads unexpectedly.
Ground pressure increases significantly when lifting loads from a corner, potentially equal to crane weight and the load itself.

Educational Knowledge Requirements

Knowledge of the minimum sheave size required for wire rope is critical; it must be at least 16 times the rope diameter.
Understanding dynamic motions, such as swinging with a load, is essential as it can lead to increased load weight on the hook.
Operators should recognize that the lifting capacity assumptions are based on ideal conditions outlined in the load chart.

Studying That Suits You

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Description

Test your knowledge on crane safety practices and precautions with this set of flashcards. Each card covers important aspects such as load rotation hazards, dangers near construction sites, and proper techniques for using timber blocking. Perfect for crane operators and safety personnel!