NCCCO
Mobile Crane 2026 Exam Prep | 100 Practice Questions,
Correct Answers & Detailed Rationales
This Exam Includes:
❖ 100 practice questions
❖ Correct answers
❖ Detailed explanations and rationales
❖ Mobile crane exam preparation
, NCCCO Mobile Crane 2026 Exam Prep | 100
Practice Questions, Correct Answers &
Detailed Rationales
1. What action does a signal person intend if he extends his
arm at shoulder height, makes a fist, and sticks his thumb up?
a. Boom down
b. Swing
c. Boom up
d. Extend boom
Rationale: The standard hand signal for “boom up” is arm
extended horizontally, fist closed, thumb pointing up.
2. When hoisting personnel, within what percentage of level
must a telescopic boom crane be for the gross ratings in the
load chart to remain valid?
a. 1%
b. 2%
c. 5%
d. 8%
Rationale: OSHA personnel-hoisting rules require the crane to be
level within 1%.
,3. The load line contacts an energized power line. There is no
sign of fire or other danger. What should you do?
a. Climb down carefully
b. Jump down, feet together
c. Stay in the cab until the lines are de-energized
d. Get as far away as possible
Rationale: Staying in the cab protects the operator from step and
touch potential until power is removed.
4. According to OSHA 1926.1413, how many randomly
distributed broken wires in rotation-resistant rope cause
replacement?
a. 1 broken wire in 6 rope diameters
b. 2 broken wires in 30 rope diameters
c. 3 broken wires in one strand in one lay
d. 2 broken wires in 6 rope diameters
Rationale: Rotation-resistant rope has stricter broken-wire
removal criteria.
5. What is the net capacity of a crane on main boom unless
the manufacturer states otherwise?
a. Load chart capacity minus weight of rigging and all
attachments
b. Load chart capacity plus weight of rigging and all attachments
, c. Load chart capacity minus rigging and all attachments not in
use
d. Load chart capacity minus rigging alone
Rationale: Net capacity deducts the weight of rigging and
attachments from gross chart capacity.
6. What may happen to a properly rigged load when lifted off
the ground unless the operator accounts for boom
deflection?
a. It could swing out away from the crane
b. It could swing in toward the crane
c. It could raise absolutely vertically
d. It could shift in its rigging
Rationale: Boom deflection increases radius, causing the load to
move away from the crane.
7. What Standard Method hand signal is being illustrated?
a. Swing
b. Stop
c. Emergency Stop
d. Travel
Rationale: The source identifies this signal as swing.
Mobile Crane 2026 Exam Prep | 100 Practice Questions,
Correct Answers & Detailed Rationales
This Exam Includes:
❖ 100 practice questions
❖ Correct answers
❖ Detailed explanations and rationales
❖ Mobile crane exam preparation
, NCCCO Mobile Crane 2026 Exam Prep | 100
Practice Questions, Correct Answers &
Detailed Rationales
1. What action does a signal person intend if he extends his
arm at shoulder height, makes a fist, and sticks his thumb up?
a. Boom down
b. Swing
c. Boom up
d. Extend boom
Rationale: The standard hand signal for “boom up” is arm
extended horizontally, fist closed, thumb pointing up.
2. When hoisting personnel, within what percentage of level
must a telescopic boom crane be for the gross ratings in the
load chart to remain valid?
a. 1%
b. 2%
c. 5%
d. 8%
Rationale: OSHA personnel-hoisting rules require the crane to be
level within 1%.
,3. The load line contacts an energized power line. There is no
sign of fire or other danger. What should you do?
a. Climb down carefully
b. Jump down, feet together
c. Stay in the cab until the lines are de-energized
d. Get as far away as possible
Rationale: Staying in the cab protects the operator from step and
touch potential until power is removed.
4. According to OSHA 1926.1413, how many randomly
distributed broken wires in rotation-resistant rope cause
replacement?
a. 1 broken wire in 6 rope diameters
b. 2 broken wires in 30 rope diameters
c. 3 broken wires in one strand in one lay
d. 2 broken wires in 6 rope diameters
Rationale: Rotation-resistant rope has stricter broken-wire
removal criteria.
5. What is the net capacity of a crane on main boom unless
the manufacturer states otherwise?
a. Load chart capacity minus weight of rigging and all
attachments
b. Load chart capacity plus weight of rigging and all attachments
, c. Load chart capacity minus rigging and all attachments not in
use
d. Load chart capacity minus rigging alone
Rationale: Net capacity deducts the weight of rigging and
attachments from gross chart capacity.
6. What may happen to a properly rigged load when lifted off
the ground unless the operator accounts for boom
deflection?
a. It could swing out away from the crane
b. It could swing in toward the crane
c. It could raise absolutely vertically
d. It could shift in its rigging
Rationale: Boom deflection increases radius, causing the load to
move away from the crane.
7. What Standard Method hand signal is being illustrated?
a. Swing
b. Stop
c. Emergency Stop
d. Travel
Rationale: The source identifies this signal as swing.
