NCCCO Mechanical Systems & Maintenance Practices 2

Question 1

How often should a crane receive a 'frequent' inspection according to OSHA?

Accepted Answer

Daily to monthly, depending on the component and severity of service conditions

Answer

OSHA requires 'frequent' inspections ranging from daily pre-shift checks to monthly reviews of critical components. The frequency depends on the crane's usage intensity and operating environment.

Question 2

What is the primary purpose of checking hydraulic fluid levels before operating a crane?

Accepted Answer

Hydraulic fluid powers critical systems; low levels can cause loss of control of boom, hoist, or outriggers

Answer

Hydraulic systems operate the boom, hoist, swing, and outriggers. Insufficient fluid can cause these systems to fail or become sluggish, creating dangerous conditions during lifts.

Question 3

What should an operator look for when inspecting wire rope?

Accepted Answer

Broken wires, kinks, crushing, birdcaging, corrosion, reduced diameter, and heat damage

Answer

Wire rope inspection covers: broken wires (count per strand), kinking, crushing, birdcaging, corrosion, wear patterns, reduced diameter, heat discoloration, and damage at termination points.

Question 4

What is 'birdcaging' in wire rope?

Accepted Answer

When the outer strands separate and spread outward from the core, resembling a birdcage

Answer

Birdcaging occurs when outer strands open up from the rope core, typically caused by sudden load release or improper spooling. It permanently weakens the rope and requires immediate replacement.

Question 5

How often should the crane's braking system be tested?

Accepted Answer

Before each shift as part of the pre-operation inspection

Answer

Brake function is tested daily as part of the pre-operation inspection. This includes hoist brakes, swing brakes, and travel brakes. Any brake issues require immediate attention.

NCCCO (National Commission for the Certification of Crane Operators) Practice Test

NCCCO (National Commission for the Certification of Crane Operators) Practice Test

NCCCO Mechanical Systems & Maintenance Practices 2