NCCCO TELESCOPIC CORE REVIEW EXAM
ACTUAL EXAM UPDATED QUESTIONS AND
ACCURATE DETAILED ANSWERS FOR GRADE A+
1. A crane's load chart shows a capacity of 28,000 lbs at a 22 ft radius with outriggers
fully extended. If the outriggers are only 80% extended, the capacity will most likely be:
A) 28,000 lbs
B) 22,400 lbs
C) 25,200 lbs
D) 14,000 lbs
Correct answer: B) 22,400 lbs ✅
Rationale: Capacity reduction is roughly proportional to stability base reduction; 80%
extension often gives approximately 80% of fully extended capacity, though manufacturer
chart must be used.
2. The crane's rated capacity is based on the crane being level within:
A) 0.5°
B) 1°
C) 2°
D) 5°
Correct answer: B) 1° ✅
Rationale: Most manufacturers specify level within 1% (approximately 0.57°) but often
state 1° maximum for full capacity.
3. When a crane's hoist rope has been lengthened by splicing, the splice must be:
A) Taped over
B) Able to pass through sheaves without interference
C) Located only on the dead end
D) Painted red
Correct answer: B) Able to pass through sheaves without interference ✅
Rationale: Any splice must be smooth and not larger than the rope diameter to avoid
jamming in sheaves or drums.
4. The maximum allowable reduction in wire rope diameter for a rotation-resistant rope
is:
A) 3%
B) 4%
C) 5%
D) 6%
Correct answer: C) 5% ✅
,Rationale: ASME B30.5 applies the same 5% diameter reduction limit to all wire ropes,
including rotation-resistant types.
5. A crane's load chart for a particular boom length shows capacities at various radii. At
a radius of 35 ft, the capacity is 12,000 lbs. At 40 ft, the capacity is 9,000 lbs. This
reduction is due to:
A) Increased stability
B) Increased load moment
C) Decreased boom angle
D) Both B and C
Correct answer: D) Both B and C ✅
Rationale: As radius increases, boom angle decreases and load moment increases, both
reducing capacity.
6. When using a crane with a jib, the operator must ensure that the jib is:
A) Always at 0° offset
B) Used only for light loads
C) Within the manufacturer's approved configuration for the lift
D) Removed when not in use
Correct answer: C) Within the manufacturer's approved configuration for the
lift ✅
Rationale: Jib use requires specific boom/jib angle combinations; deviating from approved
configurations can cause overload or instability.
7. A crane's hoist drum has a diameter of 30 inches. The wire rope diameter is 1.5
inches. The drum-to-rope ratio is:
A) 15:1
B) 18:1
C) 20:1
D) 30:1
Correct answer: C) 20:1 ✅
Rationale: *.5 = 20:1, which meets ASME minimum 18:1.*
8. The hand signal for "travel in reverse" (crane moves away from signal person) is:
A) Both arms extended forward, palms facing in, moving in a circular motion
B) Both arms extended forward, palms facing out, pushing motion
C) One arm raised with fist
D) Both arms crossed above head
Correct answer: B) Both arms extended forward, palms facing out, pushing
motion ✅
,Rationale: ASME standard for travel away from signal person is pushing motion with
palms outward.
9. A crane's outrigger floats should be placed on cribbing that extends beyond the float
by at least:
A) 1 inch on each side
B) 2 inches on each side
C) 3 inches on each side
D) 6 inches on each side
Correct answer: C) 3 inches on each side ✅
Rationale: Common industry practice: cribbing should extend at least 3 inches beyond the
float on all sides to ensure full support.
10. When a crane is set up on a barge, the crane's load chart must be reduced due to:
A) Wave motion and list
B) Lower crane weight
C) Increased counterweight effect
D) Water buoyancy
Correct answer: A) Wave motion and list ✅
Rationale: Dynamic forces from waves and possible list reduce stability; a dedicated
marine chart is required.
11. A crane's wire rope has 3 broken wires in one strand within a distance of 6 rope
diameters. The rope must be:
A) Removed
B) Used with 25% load reduction
C) Inspected monthly
D) Lubricated
Correct answer: A) Removed ✅
Rationale: ASME B30.5 requires removal for 3 broken wires in one strand in one rope lay
(or within 6 diameters for rotation-resistant ropes).
12. The operator must ensure that the crane's load radius is measured from the:
A) Center of the turntable to the load's center of gravity
B) Boom tip to the load
C) Outrigger pad to the load
D) Counterweight to the load
Correct answer: A) Center of the turntable to the load's center of gravity ✅
Rationale: Radius is the horizontal distance from the crane's center of rotation to the
vertical line through the load's center of gravity.
, 13. A crane's LMI alarms when the load reaches what percentage of rated capacity?
A) 85%
B) 90%
C) 100%
D) Manufacturer's setting (typically 90-100%)
Correct answer: D) Manufacturer's setting (typically 90-100%) ✅
Rationale: *Alarm set points vary; many LMIs warn at 90% and cut off at 100-110%.*
14. When using a crane on a slope, the outriggers on the uphill side will have:
A) Less load than downhill side
B) More load than downhill side
C) Equal load
D) No load
Correct answer: A) Less load than downhill side ✅
Rationale: Gravity shifts weight downhill, so uphill outriggers carry less load, potentially
causing them to lift off the ground.
15. The hand signal for "dog everything" (emergency stop all motions) is:
A) Both arms crossed above head
B) One arm raised with fist
C) Both arms extended horizontally, palms down, moving back and forth
D) Arm extended, palm down, moving side to side
Correct answer: A) Both arms crossed above head ✅
Rationale: Standard emergency stop signal.
16. A crane's wire rope has a "birdcage" condition 5 ft from the socket. The operator
should:
A) Cut off the damaged section and re-socket if enough rope remains
B) Replace the entire rope
C) Continue use
D) Lubricate and tape
Correct answer: B) Replace the entire rope ✅
Rationale: Birdcaging indicates internal damage that may extend beyond the visible area;
full replacement is safest.
17. A crane's load chart for on-rubber operation is valid only when:
A) The crane is on a paved surface
B) The tires are inflated to specified pressure and the crane is level
C) The outriggers are down but not contacting
D) The boom is fully retracted
Correct answer: B) The tires are inflated to specified pressure and the crane is
ACTUAL EXAM UPDATED QUESTIONS AND
ACCURATE DETAILED ANSWERS FOR GRADE A+
1. A crane's load chart shows a capacity of 28,000 lbs at a 22 ft radius with outriggers
fully extended. If the outriggers are only 80% extended, the capacity will most likely be:
A) 28,000 lbs
B) 22,400 lbs
C) 25,200 lbs
D) 14,000 lbs
Correct answer: B) 22,400 lbs ✅
Rationale: Capacity reduction is roughly proportional to stability base reduction; 80%
extension often gives approximately 80% of fully extended capacity, though manufacturer
chart must be used.
2. The crane's rated capacity is based on the crane being level within:
A) 0.5°
B) 1°
C) 2°
D) 5°
Correct answer: B) 1° ✅
Rationale: Most manufacturers specify level within 1% (approximately 0.57°) but often
state 1° maximum for full capacity.
3. When a crane's hoist rope has been lengthened by splicing, the splice must be:
A) Taped over
B) Able to pass through sheaves without interference
C) Located only on the dead end
D) Painted red
Correct answer: B) Able to pass through sheaves without interference ✅
Rationale: Any splice must be smooth and not larger than the rope diameter to avoid
jamming in sheaves or drums.
4. The maximum allowable reduction in wire rope diameter for a rotation-resistant rope
is:
A) 3%
B) 4%
C) 5%
D) 6%
Correct answer: C) 5% ✅
,Rationale: ASME B30.5 applies the same 5% diameter reduction limit to all wire ropes,
including rotation-resistant types.
5. A crane's load chart for a particular boom length shows capacities at various radii. At
a radius of 35 ft, the capacity is 12,000 lbs. At 40 ft, the capacity is 9,000 lbs. This
reduction is due to:
A) Increased stability
B) Increased load moment
C) Decreased boom angle
D) Both B and C
Correct answer: D) Both B and C ✅
Rationale: As radius increases, boom angle decreases and load moment increases, both
reducing capacity.
6. When using a crane with a jib, the operator must ensure that the jib is:
A) Always at 0° offset
B) Used only for light loads
C) Within the manufacturer's approved configuration for the lift
D) Removed when not in use
Correct answer: C) Within the manufacturer's approved configuration for the
lift ✅
Rationale: Jib use requires specific boom/jib angle combinations; deviating from approved
configurations can cause overload or instability.
7. A crane's hoist drum has a diameter of 30 inches. The wire rope diameter is 1.5
inches. The drum-to-rope ratio is:
A) 15:1
B) 18:1
C) 20:1
D) 30:1
Correct answer: C) 20:1 ✅
Rationale: *.5 = 20:1, which meets ASME minimum 18:1.*
8. The hand signal for "travel in reverse" (crane moves away from signal person) is:
A) Both arms extended forward, palms facing in, moving in a circular motion
B) Both arms extended forward, palms facing out, pushing motion
C) One arm raised with fist
D) Both arms crossed above head
Correct answer: B) Both arms extended forward, palms facing out, pushing
motion ✅
,Rationale: ASME standard for travel away from signal person is pushing motion with
palms outward.
9. A crane's outrigger floats should be placed on cribbing that extends beyond the float
by at least:
A) 1 inch on each side
B) 2 inches on each side
C) 3 inches on each side
D) 6 inches on each side
Correct answer: C) 3 inches on each side ✅
Rationale: Common industry practice: cribbing should extend at least 3 inches beyond the
float on all sides to ensure full support.
10. When a crane is set up on a barge, the crane's load chart must be reduced due to:
A) Wave motion and list
B) Lower crane weight
C) Increased counterweight effect
D) Water buoyancy
Correct answer: A) Wave motion and list ✅
Rationale: Dynamic forces from waves and possible list reduce stability; a dedicated
marine chart is required.
11. A crane's wire rope has 3 broken wires in one strand within a distance of 6 rope
diameters. The rope must be:
A) Removed
B) Used with 25% load reduction
C) Inspected monthly
D) Lubricated
Correct answer: A) Removed ✅
Rationale: ASME B30.5 requires removal for 3 broken wires in one strand in one rope lay
(or within 6 diameters for rotation-resistant ropes).
12. The operator must ensure that the crane's load radius is measured from the:
A) Center of the turntable to the load's center of gravity
B) Boom tip to the load
C) Outrigger pad to the load
D) Counterweight to the load
Correct answer: A) Center of the turntable to the load's center of gravity ✅
Rationale: Radius is the horizontal distance from the crane's center of rotation to the
vertical line through the load's center of gravity.
, 13. A crane's LMI alarms when the load reaches what percentage of rated capacity?
A) 85%
B) 90%
C) 100%
D) Manufacturer's setting (typically 90-100%)
Correct answer: D) Manufacturer's setting (typically 90-100%) ✅
Rationale: *Alarm set points vary; many LMIs warn at 90% and cut off at 100-110%.*
14. When using a crane on a slope, the outriggers on the uphill side will have:
A) Less load than downhill side
B) More load than downhill side
C) Equal load
D) No load
Correct answer: A) Less load than downhill side ✅
Rationale: Gravity shifts weight downhill, so uphill outriggers carry less load, potentially
causing them to lift off the ground.
15. The hand signal for "dog everything" (emergency stop all motions) is:
A) Both arms crossed above head
B) One arm raised with fist
C) Both arms extended horizontally, palms down, moving back and forth
D) Arm extended, palm down, moving side to side
Correct answer: A) Both arms crossed above head ✅
Rationale: Standard emergency stop signal.
16. A crane's wire rope has a "birdcage" condition 5 ft from the socket. The operator
should:
A) Cut off the damaged section and re-socket if enough rope remains
B) Replace the entire rope
C) Continue use
D) Lubricate and tape
Correct answer: B) Replace the entire rope ✅
Rationale: Birdcaging indicates internal damage that may extend beyond the visible area;
full replacement is safest.
17. A crane's load chart for on-rubber operation is valid only when:
A) The crane is on a paved surface
B) The tires are inflated to specified pressure and the crane is level
C) The outriggers are down but not contacting
D) The boom is fully retracted
Correct answer: B) The tires are inflated to specified pressure and the crane is
