NCCCO Mobile Crane Operator Test 1 2

Question 1

What is the first action a mobile crane operator should take upon arriving at a new job site?

Accepted Answer

Conduct a pre-operation site assessment identifying hazards, overhead lines, ground conditions, and obstructions

Answer

Begin assembling the crane immediately to save time

Answer

Check in with the site superintendent for any production quotas

Answer

Review prior operator log entries and proceed with crane setup

Question 2

What information must be in the cab of a mobile crane during operations?

Accepted Answer

Current load charts for the specific crane configuration in use, along with the crane's operating manual

Answer

Only the operator's NCCCO certification card

Answer

Insurance certificate and registration documents

Answer

A copy of OSHA Subpart CC regulations

Question 3

What is the purpose of the anti-two-block (ATB) device on a mobile crane?

Accepted Answer

To prevent the hook block from rising into contact with the boom tip sheave by cutting off hoist power before contact occurs

Answer

To prevent the crane from lifting loads heavier than rated capacity

Answer

To lock the boom hoist when the crane is parked

Answer

To prevent the load line from becoming tangled around the boom

Question 4

What is a load line hitch and what determines the working load limit of the hitch?

Accepted Answer

A load line hitch is the method of attaching rigging to the load; the WLL is determined by the hitch type (vertical, choker, basket) and the sling's rated capacity

Answer

A load line hitch is any connection between rope and load; the WLL equals the rope's breaking strength

Answer

A load line hitch rating is always 50% of the sling's catalog breaking strength

Answer

Load line hitch WLL is the same regardless of how the sling is configured

Question 5

What is the significance of a crane's 'rated capacity' versus its 'tipping load'?

Accepted Answer

Rated capacity is a fraction of tipping load, incorporating a safety factor so the crane remains stable with a margin before actual tipping occurs

Answer

Rated capacity and tipping load are identical values for safe operations

Answer

Tipping load is always double the rated capacity for conservative design

Answer

Rated capacity always exceeds tipping load to provide a conservative safety margin

Question 6

When a crane operator disagrees with a lift supervisor about the safety of a planned lift, what is the appropriate course of action?

Accepted Answer

Refuse to perform the lift and explain safety concerns; the operator has the authority and responsibility to refuse unsafe lifts

Answer

Follow the supervisor's instructions as they have overall site authority

Answer

Perform the lift at reduced speed to compensate for the safety concerns

Answer

Document the disagreement but proceed with the lift as instructed