RSP Crane Types & Operational Limits 3

Question 1

When a crane is operating 'on rubber' (tires only, outriggers not deployed), how does this affect its rated capacity?

Accepted Answer

Capacity is significantly reduced compared to operating on outriggers

Answer

Operating on rubber tires provides less stability than on deployed outriggers, so the crane's rated capacity on rubber is substantially lower, as shown on a separate section of the load chart.

Question 2

Which of the following is a key advantage of a lattice boom crane over a telescoping hydraulic boom crane?

Accepted Answer

Greater lifting capacity at longer radii

Answer

Lattice boom cranes are structurally more efficient at long boom lengths and large radii, allowing higher rated capacities than equivalent telescoping hydraulic cranes.

Question 3

What is the purpose of a crane's anti-two-block (ATB) system?

Accepted Answer

To stop the hoist before the hook block contacts the boom tip sheaves

Answer

The anti-two-block system detects when the hook block is close to the boom tip and automatically stops the hoist to prevent a two-block condition, which can drop the load or damage the crane.

Question 4

During a lift, the rigger and signal person notice the crane's load indicator shows the load is at 98% of rated capacity. The proper action is to:

Accepted Answer

Stop the lift, reassess the load weight and crane configuration, and verify the load chart

Answer

At 98% of rated capacity there is almost no safety margin; the team must stop, verify the actual load weight and the crane's configuration against the load chart before continuing.

Question 5

A 'pick-and-carry' operation involves a crane:

Accepted Answer

Hoisting a load and traveling with it suspended while the crane moves

Answer

In a pick-and-carry operation, the crane lifts a load and travels with it still suspended, which requires special crane design and strict adherence to the manufacturer's travel-with-load capacity ratings.

(RSP) Rigger and Signal Person Certification Practice Test

(RSP) Rigger and Signal Person Certification Practice Test

RSP Crane Types & Operational Limits 3