CORE EXAM PREP PAPER 2026 QUESTIONS
AND ANSWERS GRADED A+
◉ Operating a mobile crane with a long boom, on uneven ground,
what support condition should be considered? Answer: Keeping 90
degree angle between cylinder rod and pad
◉ What is the primary purpose fir a rooster sheave or auxiliary
boom point sheave? Answer: Separate the boom hoist lines
◉ How many randomly broken wires in a lay length must there be
on a mobile cranes hoist line, before it should be removed from
service? Answer: 6
◉ On a mobile crane, how many broken wires are permitted at the
end connection of a pendent before it must be taken out of service?
Answer: 1
◉ Type 1 rotation resistant hoist wire rope has a design factor of:
Answer: 5 to 1
◉ How many randomly distributed broken wires in rotation-
resistant hoist wire rope are considered for replacement? Answer: 2
broken wires in 6 rope diameters
,◉ The term net capacity is best defined by which of the terms listed
below? Answer: Gross capacity minus capacity deductions
◉ Mobile cranes that are set up on barges, shall have a list chart
provided by which of the entities listed below? Answer:
Manufacturer
◉ When lifting loads on tires, mobile cranes are rated at what
percentage of tipping? Answer: 75%
◉ How does the effective weight of a slowed extension relate to the
actual weight of the extension? Answer: Higher than the actual
weight.
◉ When load radius is between radii values, the operator must use
the: Answer: longer radius
◉ Why should only approved attachments or extra counterweights
provided by the manufacturer be placed on the rear of the crane?
Answer: They could cause a backward stability problem.
◉ A mobile crane's jib is offset 15º versus its original 0º offset, but
the boom angle remains unchanged. In this situation, the load
radius: Answer: increases
, ◉ Abruptly stopping a rapid swing on a long-boom mobile crane will
produce what major effect? Answer: Collapsing the boom.
◉ When determining the position to a mobile crane should be left in
over night, when high winds in the forecast the operator should:
Answer: Follow the manufacturers recommendations.
◉ 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? Answer: The radius increase.
◉ Increasing the distance from the crane's center of gravity to the
tipping axis will have what effect on the mobile crane? Answer:
Decreases stability.
◉ Backward stability of a mobile crane is tested in which
configuration listed below? Answer: Basic boom at minimum angle
with no load
◉ Deflection of the boom while operating a mobile crane will
increase? Answer: Load Radius (Swings out)
◉ A sudden start or stop of the hoisting function while operating a
mobile crane can produce a: Answer: dynamic load
AND ANSWERS GRADED A+
◉ Operating a mobile crane with a long boom, on uneven ground,
what support condition should be considered? Answer: Keeping 90
degree angle between cylinder rod and pad
◉ What is the primary purpose fir a rooster sheave or auxiliary
boom point sheave? Answer: Separate the boom hoist lines
◉ How many randomly broken wires in a lay length must there be
on a mobile cranes hoist line, before it should be removed from
service? Answer: 6
◉ On a mobile crane, how many broken wires are permitted at the
end connection of a pendent before it must be taken out of service?
Answer: 1
◉ Type 1 rotation resistant hoist wire rope has a design factor of:
Answer: 5 to 1
◉ How many randomly distributed broken wires in rotation-
resistant hoist wire rope are considered for replacement? Answer: 2
broken wires in 6 rope diameters
,◉ The term net capacity is best defined by which of the terms listed
below? Answer: Gross capacity minus capacity deductions
◉ Mobile cranes that are set up on barges, shall have a list chart
provided by which of the entities listed below? Answer:
Manufacturer
◉ When lifting loads on tires, mobile cranes are rated at what
percentage of tipping? Answer: 75%
◉ How does the effective weight of a slowed extension relate to the
actual weight of the extension? Answer: Higher than the actual
weight.
◉ When load radius is between radii values, the operator must use
the: Answer: longer radius
◉ Why should only approved attachments or extra counterweights
provided by the manufacturer be placed on the rear of the crane?
Answer: They could cause a backward stability problem.
◉ A mobile crane's jib is offset 15º versus its original 0º offset, but
the boom angle remains unchanged. In this situation, the load
radius: Answer: increases
, ◉ Abruptly stopping a rapid swing on a long-boom mobile crane will
produce what major effect? Answer: Collapsing the boom.
◉ When determining the position to a mobile crane should be left in
over night, when high winds in the forecast the operator should:
Answer: Follow the manufacturers recommendations.
◉ 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? Answer: The radius increase.
◉ Increasing the distance from the crane's center of gravity to the
tipping axis will have what effect on the mobile crane? Answer:
Decreases stability.
◉ Backward stability of a mobile crane is tested in which
configuration listed below? Answer: Basic boom at minimum angle
with no load
◉ Deflection of the boom while operating a mobile crane will
increase? Answer: Load Radius (Swings out)
◉ A sudden start or stop of the hoisting function while operating a
mobile crane can produce a: Answer: dynamic load
