NCCCO MOBILE CRANE CERTIFICATION
EVALUATION SCRIPT 2026 TESTED QUESTIONS
AND CORRECT ANSWERS
◉ Leverage of the load. Answer: As a crane operator booms down
with a suspended load, the load's leverage on the crane increases as
radius increases, making the load feel effectively 'heavier' to the
crane
◉ Radio communications failure. Answer: The operator should stop
operations until communication is restored
◉ Crane operations during lightning. Answer: During an electrical
storm with lightning in the area, crane operations should be
suspended, and everyone should stay away from the crane until the
storm has passed
◉ Mobile crane on rubber tires. Answer: When a mobile crane is
working on rubber tires (no outriggers), its lifting capacities are
generally lower due to reduced stability, often limited to about 75%
of tipping capacity and subject to directional limits
◉ Truck-mounted cranes without stabilizers. Answer: Many truck-
mounted cranes without a front stabilizer have no lifting capacity
, over the front of the crane because the crane can tip forward if a
load is lifted directly over the front
◉ OSHA regulation for cranes. Answer: 29 CFR 1926 Subpart CC
specifically covers cranes and derricks used in construction,
including mobile crane operator certification requirements
◉ ASME B30.5. Answer: A safety standard that applies to mobile and
locomotive cranes (crawler, truck cranes, etc.)
◉ Crane stability principle. Answer: Crane stability is established on
the principle of leverage and balance of moments (counterweight vs.
load at distances)
◉ Working radius. Answer: Defined as the distance from the crane's
center of rotation to the center of the load's hook or center of
gravity, in a horizontal line
◉ Parts of line. Answer: The number of wire rope falls/lines
supporting the hook block (number of line parts between boom tip
and hook)
◉ Jib (boom extension) effect. Answer: Increases the crane's reach
(tip height and radius) but reduces the crane's lifting capacity (due
to additional weight and leverage)
EVALUATION SCRIPT 2026 TESTED QUESTIONS
AND CORRECT ANSWERS
◉ Leverage of the load. Answer: As a crane operator booms down
with a suspended load, the load's leverage on the crane increases as
radius increases, making the load feel effectively 'heavier' to the
crane
◉ Radio communications failure. Answer: The operator should stop
operations until communication is restored
◉ Crane operations during lightning. Answer: During an electrical
storm with lightning in the area, crane operations should be
suspended, and everyone should stay away from the crane until the
storm has passed
◉ Mobile crane on rubber tires. Answer: When a mobile crane is
working on rubber tires (no outriggers), its lifting capacities are
generally lower due to reduced stability, often limited to about 75%
of tipping capacity and subject to directional limits
◉ Truck-mounted cranes without stabilizers. Answer: Many truck-
mounted cranes without a front stabilizer have no lifting capacity
, over the front of the crane because the crane can tip forward if a
load is lifted directly over the front
◉ OSHA regulation for cranes. Answer: 29 CFR 1926 Subpart CC
specifically covers cranes and derricks used in construction,
including mobile crane operator certification requirements
◉ ASME B30.5. Answer: A safety standard that applies to mobile and
locomotive cranes (crawler, truck cranes, etc.)
◉ Crane stability principle. Answer: Crane stability is established on
the principle of leverage and balance of moments (counterweight vs.
load at distances)
◉ Working radius. Answer: Defined as the distance from the crane's
center of rotation to the center of the load's hook or center of
gravity, in a horizontal line
◉ Parts of line. Answer: The number of wire rope falls/lines
supporting the hook block (number of line parts between boom tip
and hook)
◉ Jib (boom extension) effect. Answer: Increases the crane's reach
(tip height and radius) but reduces the crane's lifting capacity (due
to additional weight and leverage)
