Free A/D Director Practice Questions

Question 1

Lattice-boom disassembly has reached an interior section between the boom tip and crane body. The boom is supported only at its foot connection and by the tip section resting on blocking; the pendants are slack. A mechanic proposes driving an interior bottom pin partway out while leaving the top pins in place. Is that pin removal permitted in this support condition?

Accepted Answer

No. Tip support prohibits partial withdrawal of either top or bottom pins in that inboard section.

Answer

Yes. Once pendant tension is relieved, bottom pins may be partly withdrawn while top pins remain fully engaged.

Answer

No. Pendant tension must first be restored so the suspension system supports the boom during pin removal.

Answer

Yes. The tip blocking and retained top pins provide the support needed for a controlled partial withdrawal.

Question 2

An alley prevents full outrigger extension for a telescoping-boom crane being assembled. Its manufacturer permits the intermediate extension shown on a dedicated load chart. The A/D Director verifies that every planned assembly phase is within that chart's limits, the wheels are unloaded, and the level, ground support, attached floats, and blocking meet the manufacturer's requirements. What disposition is justified by these facts?

Accepted Answer

Use the approved intermediate extension and stay within its chart's limits.

Answer

Relocate the crane; federal A/D rules require full outrigger extension.

Answer

Use the full-extension chart with a reduction matching the unextended beam length.

Answer

Retain some weight on the wheels to compensate for the shorter outrigger spread.

Question 3

An assist crane will carry a 10,800-lb component from a 25-ft radius to a final radius of 37 ft. Its chart lists gross capacities of 19,000 lb at 25 ft, 15,000 lb at 35 ft, and 13,000 lb at 40 ft. The chart directs use of the next greater listed radius and requires deductions for a 600-lb hook block, 200 lb of slings and shackles, and a 900-lb lifting beam; no other deductions apply. For the final placement, the correct capacity assessment is:

Accepted Answer

Within capacity by 500 lb, using the 40-ft chart entry.

Answer

Within capacity by 2,200 lb, using the 40-ft chart entry.

Answer

Within capacity by 1,700 lb, interpolating a 37-ft capacity.

Answer

Over capacity by 1,200 lb, using the 40-ft chart entry.

Question 4

An employer appoints a foreman who recognizes A/D hazards and has authority to correct them. An experienced crane specialist with demonstrated ability to solve the equipment's assembly problems will assist throughout the operation. The foreman does not independently meet the qualified-person criteria; the specialist has no authority to order site corrections. Under OSHA's A/D supervision rule, this arrangement:

Accepted Answer

Is permitted: the competent person directs with qualified-person assistance.

Answer

Must be changed so the specialist directs the work without the foreman.

Answer

Must be delayed until one individual satisfies both sets of criteria.

Answer

Is permitted only if the specialist also obtains the foreman's corrective authority.

Question 5

For lattice-boom assembly beside an energized line, the utility confirms a voltage of 115 kV and the employer selects OSHA's Table A option. The assessed paths keep every part of the equipment, load line, load, rigging, and lifting accessories at least 18 ft from the line; nothing passes beneath it. Effective encroachment controls are in place. How does the 18-ft separation compare with the requirement for this plan?

Accepted Answer

It satisfies the 15-ft minimum applicable to this voltage-based plan.

Answer

It is deficient because 20 ft remains mandatory under the Table A option.

Answer

It meets the applicable 10-ft minimum for lines below 200 kV.

Answer

It is prohibited unless the utility deenergizes every line within 20 ft.

Question 6

A 10,000-lb jib section has its center of gravity midway between two lifting points and is rigged on two equally loaded sling legs. Each leg is 30 degrees above horizontal, and its allowable tension in this arrangement is 8,000 lb. Assume a static, symmetric lift; the lifting points and upper fitting are adequate for the resulting forces. Which leg-tension check is correct?

Accepted Answer

10,000 lb per leg; exceeds the limit by 2,000 lb.

Answer

5,000 lb per leg; within the limit by 3,000 lb.

Answer

Approximately 5,774 lb per leg; within the limit by 2,226 lb.

Answer

20,000 lb per leg; exceeds the limit by 12,000 lb.

Question 7

A swing-away jib remains folded alongside a telescoping boom. The manufacturer's procedure requires assist-crane support and a fully installed pivot pin and retainer before opening the transport latch. The assist crane has taken the specified jib load, the connection is verified, and the crew is clear of the swing path. The operators have established the prescribed movement controls. Which action can now advance the erection sequence?

Accepted Answer

Open the transport latch and begin the controlled swing with assist-crane support.

Answer

Release the assist crane's support and swing the jib on the pivot connection.

Answer

Withdraw the pivot pin slightly so the jib cannot bind during its swing.

Answer

Fit the working-position pins before releasing the jib from the transport latch.

Question 8

A mobile crane has been reassembled with a longer lattice boom. Its annual inspection was completed two months ago, and the operator has finished the current shift inspection. The operator is a competent person but is not qualified to evaluate the new boom configuration. Before the crane makes its first production lift, what additional inspection is required?

Accepted Answer

A qualified-person inspection confirming that the assembled crane meets its configuration criteria.

Answer

A complete new annual inspection, performed by an inspector independent of the assembly employer.

Answer

An unloaded functional check by the operator, followed by inspection of the configuration during the shift.

Answer

A post-assembly check only if the new boom length exceeds a configuration previously used on this crane.

Question 9

During a tower's post-erection plumb check, a qualified person measures 2.4 inches of horizontal deviation over 150 ft of vertical height. The crane manufacturer specifies a maximum deviation of 1:1,000. Which finding should be recorded?

Accepted Answer

Unacceptable: the applicable maximum deviation is 1.8 inches.

Answer

Acceptable: the applicable maximum deviation is 3.6 inches.

Answer

Unacceptable: the applicable maximum deviation is 0.15 inch.

Answer

Acceptable: the applicable maximum deviation is 18 inches.

Question 10

During A/D, a mechanic radios, 'Going behind the counterweight; hold all movement.' The operator acknowledges. Their agreed release is the mechanic's 'Clear of the crane' call. Before that call arrives, the signal person requests a small swing. Movement may resume only after:

Accepted Answer

The agreed communication confirming that the mechanic is in a safe position.

Answer

The signal person's confirmation that the planned swing is only a few degrees.

Answer

The A/D Director's assessment that sufficient time has passed for the mechanic to finish.

Answer

A horn warning followed by a pause long enough for the mechanic to move clear.

Free A/D Director Practice Questions

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