NCCCO CRANE OPERATOR CERTIFICATION 3
MOCK TEST WITH ANSWER RATIONALES 2026
◉ Clearance distance for extremely high-voltage lines over 750 kV.
Answer: C. 45 feet
◉ Crane assembly and disassembly supervision.
Answer: C. Directed by a qualified Assembly/Disassembly (A/D)
director who understands the process and hazards
◉ Pre-lift requirements for crane operations.
Answer: B. Review the planned lift requirements, load weight, and
site conditions with the site supervisor or lift director
◉ Setting up a crane on a slope.
Answer: B. Use cribbing or blocking under the outriggers or tracks
to level the crane as much as possible (within 1% level) before lifting
◉ Working near energized power lines.
Answer: B. If it's necessary to work closer than the mandated
clearance to live power lines, the lines must be de-energized and
grounded or insulated, and a dedicated spotter should be used.
,◉ Standard hand signals for crane operation.
Answer: C. Boom up
◉ Authority to halt crane operation.
Answer: B. The crane operator has the authority to refuse or stop
operations he/she deems unsafe
◉ Most common cause of fatal crane operator accidents.
Answer: B. Electrocution (contact with power lines)
◉ Riding on the crane's hook or load.
Answer: D. Never - it is prohibited to carry personnel on the hook or
load (except in a properly designed man-basket under very strict
guidelines)
◉ Climb down from the cab.
Answer: Carefully get away from the crane.
◉ Jump clear of the crane.
Answer: Keep feet together while jumping.
, ◉ Stay in the cab.
Answer: Keep everyone away and have the power company de-
energize the lines before doing anything else.
◉ Swing the crane clear of the power line.
Answer: Try to do this immediately.
◉ Side-loading.
Answer: Permitted only with freely suspended loads that can swing
(i.e., never intentionally drag or pull a load to the side).
◉ Shock loading.
Answer: Can be dangerous because it creates forces much greater
than the load's static weight, potentially exceeding the crane's
capacity.
◉ Boom deflection.
Answer: If not accounted for, a properly rigged load will likely swing
or drift away from the crane as it becomes suspended.
◉ High winds effect on crane operations.
Answer: High winds can create dangerous sail effect on loads and
booms, so operations should be limited or stopped per
manufacturer guidelines (often around 20-30 mph).
MOCK TEST WITH ANSWER RATIONALES 2026
◉ Clearance distance for extremely high-voltage lines over 750 kV.
Answer: C. 45 feet
◉ Crane assembly and disassembly supervision.
Answer: C. Directed by a qualified Assembly/Disassembly (A/D)
director who understands the process and hazards
◉ Pre-lift requirements for crane operations.
Answer: B. Review the planned lift requirements, load weight, and
site conditions with the site supervisor or lift director
◉ Setting up a crane on a slope.
Answer: B. Use cribbing or blocking under the outriggers or tracks
to level the crane as much as possible (within 1% level) before lifting
◉ Working near energized power lines.
Answer: B. If it's necessary to work closer than the mandated
clearance to live power lines, the lines must be de-energized and
grounded or insulated, and a dedicated spotter should be used.
,◉ Standard hand signals for crane operation.
Answer: C. Boom up
◉ Authority to halt crane operation.
Answer: B. The crane operator has the authority to refuse or stop
operations he/she deems unsafe
◉ Most common cause of fatal crane operator accidents.
Answer: B. Electrocution (contact with power lines)
◉ Riding on the crane's hook or load.
Answer: D. Never - it is prohibited to carry personnel on the hook or
load (except in a properly designed man-basket under very strict
guidelines)
◉ Climb down from the cab.
Answer: Carefully get away from the crane.
◉ Jump clear of the crane.
Answer: Keep feet together while jumping.
, ◉ Stay in the cab.
Answer: Keep everyone away and have the power company de-
energize the lines before doing anything else.
◉ Swing the crane clear of the power line.
Answer: Try to do this immediately.
◉ Side-loading.
Answer: Permitted only with freely suspended loads that can swing
(i.e., never intentionally drag or pull a load to the side).
◉ Shock loading.
Answer: Can be dangerous because it creates forces much greater
than the load's static weight, potentially exceeding the crane's
capacity.
◉ Boom deflection.
Answer: If not accounted for, a properly rigged load will likely swing
or drift away from the crane as it becomes suspended.
◉ High winds effect on crane operations.
Answer: High winds can create dangerous sail effect on loads and
booms, so operations should be limited or stopped per
manufacturer guidelines (often around 20-30 mph).
