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NCCCO Core Practice Exam Questions and 100% Correct Verified ANSWERs| Grade A
- 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?
- ANSWER: Boom up (This is a standard hand signal
indicating the operator should raise the boom.)
- 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?
- ANSWER: 1% (OSHA 1926.1431 requires the crane to be
level within 1% unless the manufacturer specifies otherwise.)
- 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?
- ANSWER: Stay in the cab until the lines are de-energized
(OSHA 1926.1408 advises operators to remain in the cab unless there’s an imminent danger like fire, as it’s the safest place until power is cut.)
- According to OSHA 1926.1413, how many randomly
distributed broken wires in rotation-resistant rope are cause for replacement of the rope?
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- ANSWER: 2 broken wires in 6 rope diameters (Per OSHA
1926.1413(a)(2)(ii)(A)(2), this is a criterion for replacement in rotation-resistant wire rope.)
- What is the net capacity of a crane on main boom unless the
manufacturer states otherwise?
- ANSWER: The capacity listed in the load chart minus the
weight of the rigging and all attachments (This is standard practice to determine net lifting capacity.)
- What may happen to a properly rigged load when lifted off
the ground unless the operator takes account of boom deflection?
- ANSWER: It could swing out away from the crane (Boom
deflection can cause the load to shift outward if not compensated for.)
- What Standard Method hand signal is being illustrated?
[Context: “Swing”]
- ANSWER: Swing (This refers to the signal where the arm is
extended horizontally with the palm down, typically swung in the desired direction.)
- Who should an operator respond to a "stop" signal from?
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- ANSWER: Anyone (OSHA 1926.1419(f) mandates that
operators must obey a stop signal regardless of who gives it.)
- Which area do truck cranes without a 5th outrigger generally
have no lifting capacity unless the manufacturer states otherwise?
- ANSWER: The front (Without a fifth outrigger, stability is
compromised over the front quadrant.)
- What is the definition of "operating radius"?
- ANSWER: The distance from the center of rotation of the
crane to the center of gravity of the load (This is a standard definition in crane operations.)
- What applies to the capacities below the bold line shown on
a load chart?
- ANSWER: They are based on the stability of the crane
(Below the bold line, capacities are typically stability-limited rather than structurally limited.)
- In which quadrant are rough terrain crane capacities
generally greater?
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- ANSWER: Over the front (Rough terrain cranes often have
greater capacity over the front due to design and outrigger placement.)
- According to federal requirements, under what conditions is
it okay for a person to ride the headache ball?
- ANSWER: It is never okay (OSHA 1926.1431 prohibits
riding the headache ball under any circumstances.)
- By what percentage do most manufacturers require a crane's
load chart capacity to be reduced by for duty cycle operations such as high-volume concrete placement?
- ANSWER: 20% (This is a common manufacturer
recommendation to account for continuous operation stresses.)
- From which two points should the boom be measured?
- ANSWER: From the boom hinge pins to the center of the
boom tip sheave (This is the standard measurement per ASME
B30.5.)
- What is the preferred method of installing wire rope from a
reel onto a hoist drum?