Service Truck Crane Operator Test 1 Flashcards

A service truck crane is set up on a 3° side slope with outriggers deployed. The load chart specifies ratings for level ground only. According to ASME B30.22 and NCCCO standards, what is the operator's required action before lifting?

Answer: Consult the manufacturer's load chart or capacity de-rating guidance specific to that slope condition before lifting

ASME B30.22 requires the operator to operate within the manufacturer's rated capacity, which includes slope conditions. When a load chart specifies level operation only, the operator must obtain manufacturer-specific de-rating guidance or level the machine properly before lifting — no universal percentage reduction applies across all crane models.

During a pick-and-carry operation with a service truck crane, the operator must cross a railroad grade crossing with a suspended load. What is the NCCCO-compliant requirement?

Answer: Pick-and-carry with a suspended load across a railroad crossing is prohibited unless the manufacturer's load chart explicitly permits it and a spotter is used

ASME B30.22 and NCCCO standards require that pick-and-carry operations only be performed when expressly permitted by the manufacturer and within the dynamic capacity specified. Crossing a railroad grade crossing with a suspended load adds dynamic shock loading not accounted for in static load charts; unless the manufacturer explicitly addresses this, it is prohibited.

A knuckle-boom service truck crane's load moment indicator (LMI) alarms during a lift at 87% of rated capacity with the boom fully extended at maximum radius. The operator silences the alarm and continues. Under OSHA 1910.180 and NCCCO guidelines, which statement is MOST accurate regarding this action?

Answer: Silencing or overriding an LMI alarm without stopping the lift and investigating the cause is a violation of safe operating practice and potentially OSHA regulations

LMIs are rated load indicators required by ASME B30.22 and referenced in OSHA standards. Silencing an alarm without stopping the operation to identify the cause is a violation of safe practice. The alarm indicates the crane is approaching or has exceeded its rated capacity at that configuration; continuing the lift risks structural failure or tip-over.

A service truck crane operator is asked to lift a load using a synthetic roundsling rated at 12,000 lbs vertical. The lift requires a choker hitch configuration at a 45° choke angle. What is the maximum load the sling can safely handle in this configuration?

Answer: 7,200 lbs — applying the 0.80 choker efficiency factor and a 0.75 factor for the 45° choke angle

ASME B30.9 requires applying both the choker hitch efficiency factor (0.80) and the angle-of-choke factor for angles below 120°. At a 45° choke angle, the angle-of-choke factor is approximately 0.75. Therefore: 12,000 × 0.80 × 0.75 = 7,200 lbs. Ignoring the choke angle factor is a common and dangerous error.

A service truck crane operator is about to make a blind lift behind a structure where the load is not visible. A qualified signal person is not available. Which action is NCCCO-compliant?

Answer: The operator must stop the operation until a qualified signal person is on-site; the lift may not proceed under any alternative arrangement

Under OSHA 29 CFR 1926.1428 and ASME B30.22, when the operator does not have a clear view of the load path and the load, a qualified signal person is mandatory. No alternative — cameras, radios with unqualified workers, or mirrors — substitutes for a qualified signal person in this scenario. The lift must stop until a qualified signal person is present.

When inspecting a service truck crane's wire rope, an operator finds 4 broken wires in one lay length within the running rope, all located in the same strand. Per ASME B30.22 removal-from-service criteria, what is the correct determination?

Answer: The rope must be removed from service; 3 or more broken wires in a single strand within one lay length is a removal criterion

ASME B30.22 specifies that rope must be removed from service if there are 3 or more broken wires in a single strand within one lay length, even if the total broken wire count does not yet reach the overall threshold. Four broken wires in the same strand clearly exceeds this single-strand threshold, requiring immediate removal regardless of overall wire count.