NCCER Crane Operations & Safety Procedures 2

Question 1

When a crane operator receives conflicting signals from two different signalers, what should the operator do?

Accepted Answer

Stop the load and request clarification before proceeding

Answer

An operator should stop all movement and get clarification when receiving conflicting signals, as proceeding could cause a dangerous situation.

Question 2

What is the minimum safe distance a crane must maintain from energized power lines rated at 50 kV or less?

Accepted Answer

10 feet

Answer

OSHA requires a minimum 10-foot clearance from energized power lines rated 50 kV or less.

Question 3

Which condition MOST requires a crane operator to stop operations and contact a competent person?

Accepted Answer

Unusual noise or vibration during operation

Answer

Unusual noises or vibrations can indicate mechanical failure and require immediate inspection before operations resume.

Question 4

What does the term 'two-blocking' refer to in crane operations?

Accepted Answer

The upper load block contacting the boom tip sheaves

Answer

Two-blocking occurs when the upper load block or hook travels up and contacts the boom tip, which can cause the load line to break.

Question 5

Under NCCER standards, who is responsible for ensuring that the crane's load chart is available and legible in the cab?

Accepted Answer

The crane operator

Answer

The crane operator is responsible for having a legible load chart accessible in the cab at all times during operation.

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