NCCER Crane Operations & Safety Procedures 5

Question 1

What is the maximum allowable slope for setting up a mobile crane on outriggers, according to most crane manufacturer specifications?

Accepted Answer

3 degrees

Answer

Most crane manufacturers specify a maximum 1% to 3-degree setup slope; exceeding this shifts the crane's center of gravity and reduces stability.

Question 2

When is it permissible to carry a suspended load while traveling a mobile crane?

Accepted Answer

Only when expressly permitted by the load chart or manufacturer and with a defined travel path

Answer

Traveling with a suspended load is only permitted when the crane's load chart specifically allows it and a safe, pre-defined travel path is established.

Question 3

What does a 'rated capacity limiter' (RCL) or 'load moment indicator' (LMI) do on a modern crane?

Accepted Answer

Warns or prevents the operator from exceeding the crane's rated load capacity

Answer

An RCL/LMI monitors the load and boom configuration and provides audible/visual warnings or automatic cutouts when rated capacity is approached.

Question 4

Which of the following describes 'dynamic loading' in crane operations?

Accepted Answer

Forces on the crane caused by sudden starts, stops, or swings in addition to the static weight

Answer

Dynamic loading refers to inertial and impact forces generated by rapid crane movements, which can significantly exceed the load's static weight.

Question 5

A crane operator notices that the swing brake is not holding the load in position after a swing. What is the correct response?

Accepted Answer

Immediately stop operations and remove the crane from service for repair

Answer

A malfunctioning swing brake is a critical safety defect; the crane must be taken out of service until the brake is repaired and tested.

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

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

NCCER Crane Operations & Safety Procedures 5