NCCER Crane Site Operations & Hazard Recognition 4

Question 1

A crane operator notices hydraulic fluid leaking from the boom cylinder during a lift. What should the operator do first?

Accepted Answer

Lower the load to the ground immediately and shut down the crane

Answer

A hydraulic leak can cause sudden loss of boom support, so the load must be lowered and the crane taken out of service immediately.

Question 2

Which document must the crane operator have access to at all times during operation?

Accepted Answer

The crane's load chart and manufacturer's operating manual

Answer

OSHA and ASME B30.5 require the load chart and operator's manual to be available in the cab for reference during all operations.

Question 3

What effect does operating with the outriggers only partially extended have on the crane's rated capacity?

Accepted Answer

Capacity is significantly reduced compared to fully extended outrigger configuration

Answer

Partial outrigger extension reduces the tipping fulcrum and dramatically lowers rated capacities as specified in the crane's load chart.

Question 4

Which crane hand signal is used to indicate 'emergency stop'?

Accepted Answer

Both arms extended outward, waving rapidly up and down

Answer

The emergency stop signal uses both arms waved rapidly to command the operator to stop all motion immediately.

Question 5

What is the hazard associated with exceeding the crane's rated capacity by even a small margin?

Accepted Answer

Structural overload that can cause sudden, catastrophic crane failure

Answer

Load charts already include safety factors; exceeding rated capacity removes those margins and can cause immediate structural failure or tipping.

(NCCER Crane) National Center for Construction Education and Research Crane Certification Practice Test