NCCCO MOBILE CRANE
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📋 DOCUMENT OVERVIEW 99 Qs
This document covers topics in mobile crane operations, including signal persons, boom crane
positioning, load handling, and crane maintenance, as well as OSHA regulations and ANSI safety
standards. It provides 99 questions with correct answers and detailed explanations, allowing students to
review and understand key concepts related to mobile crane operations. Students can use this
document to study and reinforce their knowledge, ensuring a deep understanding of the material for
exam preparation.
✓ Verified Answers ✓ Exam Ready ✓ Study Guide
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EXAM QUESTIONS
QUESTION 1
What action does a signal person intend the operator to perform if he extends his arm at shoulder
height, makes a fist with his hand, and sticks his/her thumb up?
a. Boom down
b. Swing
c. Boom up
d. Extend boom
CORRECT ANSWER
c.
RATIONALE: Extending the arm at shoulder height and making a fist with a raised thumb is a signal for the operator to
move the boom in an upward direction, typically to a higher angle or position. This action is commonly associated with
the phrase "boom up," indicating the desired movement.
QUESTION 2
When hoisting personnel, within what percentage of level must a telescopic boom crane be in order
for the gross ratings in the load chart to remain valid?
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, a. 1%
b. 2%
c. 5%
d. 8%
CORRECT ANSWER
a.
RATIONALE: When hoisting personnel, a telescopic boom crane must be within 1% of level to ensure the gross ratings
in the load chart remain valid, as any deviation beyond this threshold could compromise the crane's stability and lead to
inaccurate load calculations. This requirement is crucial for maintaining the safety of personnel being lifted, as it directly
affects the crane's ability to safely handle the load.
QUESTION 3
The load line of the crane you're operating contacts an energized power line. There's no sign of any
other danger, such as fire. What should you do?
a. Climb down carefully from the crane cab
b. Jump down, feet together
c. Stay in the cab until the lines are de-energized
d. Get as far away from the crane as possible
CORRECT ANSWER
c.
RATIONALE: Staying in the cab until the lines are de-energized is the correct action because it prevents any potential
electrical shock or arc that could occur if you attempt to climb down or jump, which could be fatal. By remaining in the
cab, you minimize your risk of electrical shock and allow the power to be safely turned off before attempting to exit the
crane.
QUESTION 4
According to OSHA 1926.1413, how many randomly distributed broken wires in rotation-resistant
rope are cause for replacement of the rope?
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
CORRECT ANSWER
d.
RATIONALE: This answer choice is correct because it directly aligns with the specific safety regulation outlined in OSHA
1926.1413. The key concept is that any broken wires within a limited distance, in this case, 6 rope diameters, indicate a
potential hazard and necessitate rope replacement to ensure worker safety.
QUESTION 5
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, What is the net capacity of a crane on main boom unless the manufacturer states otherwise?
a. The capacity listed in the load chart minus the weight of the rigging and all attachments
b. The capacity listed in the load chart plus the weight of the rigging and all attachments
c. The capacity listed in the load chart minus the weight of the rigging and all attachments not in use
d. The capacity listed in the load chart minus the weight of the rigging alone
CORRECT ANSWER
a.
RATIONALE: When calculating the net capacity of a crane, it's essential to consider the weight of the rigging and
attachments that will be used to lift the load, as they contribute to the overall weight that the crane must handle. By
subtracting the weight of these rigging and attachments from the capacity listed in the load chart, operators can
accurately determine the crane's available capacity to safely lift a load.
QUESTION 6
What may happen to a properly rigged load when lifted off the ground unless the operator takes
account of boom deflection?
a. It could swing out away from the crane
b. It could swing in towards the crane
c. It could raise absolutely vertically
d. It could shift in its rigging
CORRECT ANSWER
a.
RATIONALE: When a load is lifted off the ground, it may swing away from the crane due to the counterbalance effect of
its weight, which causes the boom to deflect or swing outward, resulting in the load following a curved trajectory. This is
because the crane's boom is designed to pivot, allowing the load to be lifted, but it requires the operator to compensate
for this deflection to maintain control over the load.
QUESTION 7
What Standard Method hand signal is being illustrated?
a. Swing
b. Stop
c. Emergency Stop
d. Travel
CORRECT ANSWER
a.
RATIONALE: The hand signal for "a." Swing is typically illustrated with a sweeping motion, conveying movement or
action. This matches the standard method's definition of "Swing," which is used to indicate the train is moving and the
crew should be prepared for departures or arrivals.
QUESTION 8
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95+ (2026 Full Exam Kit) Solved Q&A | Correct & Verified Answers
100% Guarantee Pass
📋 DOCUMENT OVERVIEW 99 Qs
This document covers topics in mobile crane operations, including signal persons, boom crane
positioning, load handling, and crane maintenance, as well as OSHA regulations and ANSI safety
standards. It provides 99 questions with correct answers and detailed explanations, allowing students to
review and understand key concepts related to mobile crane operations. Students can use this
document to study and reinforce their knowledge, ensuring a deep understanding of the material for
exam preparation.
✓ Verified Answers ✓ Exam Ready ✓ Study Guide
Trusted by thousands of students and professionals worldwide
EXAM QUESTIONS
QUESTION 1
What action does a signal person intend the operator to perform if he extends his arm at shoulder
height, makes a fist with his hand, and sticks his/her thumb up?
a. Boom down
b. Swing
c. Boom up
d. Extend boom
CORRECT ANSWER
c.
RATIONALE: Extending the arm at shoulder height and making a fist with a raised thumb is a signal for the operator to
move the boom in an upward direction, typically to a higher angle or position. This action is commonly associated with
the phrase "boom up," indicating the desired movement.
QUESTION 2
When hoisting personnel, within what percentage of level must a telescopic boom crane be in order
for the gross ratings in the load chart to remain valid?
Trusted by thousands of students and professionals worldwide Page 1 of 30
, a. 1%
b. 2%
c. 5%
d. 8%
CORRECT ANSWER
a.
RATIONALE: When hoisting personnel, a telescopic boom crane must be within 1% of level to ensure the gross ratings
in the load chart remain valid, as any deviation beyond this threshold could compromise the crane's stability and lead to
inaccurate load calculations. This requirement is crucial for maintaining the safety of personnel being lifted, as it directly
affects the crane's ability to safely handle the load.
QUESTION 3
The load line of the crane you're operating contacts an energized power line. There's no sign of any
other danger, such as fire. What should you do?
a. Climb down carefully from the crane cab
b. Jump down, feet together
c. Stay in the cab until the lines are de-energized
d. Get as far away from the crane as possible
CORRECT ANSWER
c.
RATIONALE: Staying in the cab until the lines are de-energized is the correct action because it prevents any potential
electrical shock or arc that could occur if you attempt to climb down or jump, which could be fatal. By remaining in the
cab, you minimize your risk of electrical shock and allow the power to be safely turned off before attempting to exit the
crane.
QUESTION 4
According to OSHA 1926.1413, how many randomly distributed broken wires in rotation-resistant
rope are cause for replacement of the rope?
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
CORRECT ANSWER
d.
RATIONALE: This answer choice is correct because it directly aligns with the specific safety regulation outlined in OSHA
1926.1413. The key concept is that any broken wires within a limited distance, in this case, 6 rope diameters, indicate a
potential hazard and necessitate rope replacement to ensure worker safety.
QUESTION 5
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, What is the net capacity of a crane on main boom unless the manufacturer states otherwise?
a. The capacity listed in the load chart minus the weight of the rigging and all attachments
b. The capacity listed in the load chart plus the weight of the rigging and all attachments
c. The capacity listed in the load chart minus the weight of the rigging and all attachments not in use
d. The capacity listed in the load chart minus the weight of the rigging alone
CORRECT ANSWER
a.
RATIONALE: When calculating the net capacity of a crane, it's essential to consider the weight of the rigging and
attachments that will be used to lift the load, as they contribute to the overall weight that the crane must handle. By
subtracting the weight of these rigging and attachments from the capacity listed in the load chart, operators can
accurately determine the crane's available capacity to safely lift a load.
QUESTION 6
What may happen to a properly rigged load when lifted off the ground unless the operator takes
account of boom deflection?
a. It could swing out away from the crane
b. It could swing in towards the crane
c. It could raise absolutely vertically
d. It could shift in its rigging
CORRECT ANSWER
a.
RATIONALE: When a load is lifted off the ground, it may swing away from the crane due to the counterbalance effect of
its weight, which causes the boom to deflect or swing outward, resulting in the load following a curved trajectory. This is
because the crane's boom is designed to pivot, allowing the load to be lifted, but it requires the operator to compensate
for this deflection to maintain control over the load.
QUESTION 7
What Standard Method hand signal is being illustrated?
a. Swing
b. Stop
c. Emergency Stop
d. Travel
CORRECT ANSWER
a.
RATIONALE: The hand signal for "a." Swing is typically illustrated with a sweeping motion, conveying movement or
action. This matches the standard method's definition of "Swing," which is used to indicate the train is moving and the
crew should be prepared for departures or arrivals.
QUESTION 8
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