Free NCCCO Mobile Crane Assembly and Disassembly Questions and Answers

Question 1

When assembling a mobile crane, in what position should the superstructure typically be before installing counterweights?

Accepted Answer

Slewed directly over the rear of the carrier

Answer

Slewed 90 degrees to the side

Answer

Slewed directly over the front of the carrier

Answer

At any position as long as the crane is level

Question 2

When assembling a lattice boom, what is the most critical step after connecting two sections with pins?

Accepted Answer

Ensuring all connection pins are fully inserted and secured with keepers

Answer

Painting the connection point to prevent rust

Answer

Checking the boom angle indicator for accuracy

Answer

Attaching the wire rope to the boom tip

Question 3

Before beginning any assembly or disassembly procedures, what must be ensured regarding the crane's outriggers?

Accepted Answer

They are fully extended as required, set on pads, and the crane is level with tires clear of the ground

Answer

They are extended to at least 50% of their full length

Answer

The outrigger pads are at least 12 inches thick

Answer

The outrigger beams are freshly greased

Question 4

What is the only authoritative source for the correct sequence and procedures for assembling or disassembling a specific mobile crane?

Accepted Answer

The crane manufacturer's operator/assembly manual

Answer

The company's general safety manual

Answer

The senior operator's experience

Answer

OSHA 1926 Subpart CC

Question 5

When assembling a luffing jib on the ground, what is a primary hazard the crew must control?

Accepted Answer

The potential for uncontrolled movement due to the jib's center of gravity

Answer

The jib is typically heavier than the main boom

Answer

The jib requires a special type of wire rope that is hard to install

Answer

The jib pins are a different color than the main boom pins

Question 6

During disassembly, an assist crane removes the main boom. What must the lift director's calculation of the boom's weight include?

Accepted Answer

The total weight of the boom, including all rigging, wire rope, and the hook block

Answer

The length of the boom only

Answer

The weather forecast for the next week

Answer

The cost of the assist crane rental

Question 7

What is a key element of a good site layout plan for mobile crane assembly/disassembly?

Accepted Answer

Having a designated, level, and firm area with sufficient space for all components and assist cranes

Answer

Ensuring the area is close to a public road for easy access

Answer

Placing the components in the order they were removed from the truck

Answer

Making sure the area has good cell phone reception for communication