NCCCO Mobile Crane Practice Exam 2025 - Free Crane Operator Certification Practice Questions and Study Guide

Image Description

Question: 1 / 400

During crane operations, what does the term "two-blocking" refer to?

A lifting motion exceeding specifications

Cable snagging

Contact between the hook and the boom

The term "two-blocking" specifically refers to the situation where the hook makes contact with the boom of the crane. This can occur when the hoisting cable becomes fully retracted, causing the hook to rise and collide with the boom itself. Such an event can lead to severe equipment damage or even catastrophic failures, as it puts undue stress on the crane's rigging and components.

In crane operations, it is crucial to identify and mitigate the risks associated with two-blocking. Operators can implement various safety precautions and follow manufacturer's guidelines to avoid this condition. Ensuring proper lifting techniques, maintaining appropriate loads, and using limit switches are just a few measures employed for this purpose.

Understanding the implications of two-blocking is vital for safe crane operation, highlighting the importance of training and awareness in preventing accidents related to this condition.

Get further explanation with Examzify DeepDiveBeta

Improper signal communication

Next Question

Report this question

Download National Commission for the Certification of Crane Operators (NCCCO) Mobile Crane Practice Exam PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy