Module 6 Introduction to Basic Rigging Review Questions Answers
A month ago our Hand-Me-Downwards Rigging mail discussed the need for actual grooming versus having riggers beingness taught by their co-workers. As part of that article, we invited readers to take a 5-question rigging quiz. This simple quiz was adapted from Crane Tech's Qualified Rigger Level 1 curriculum with questions that we consider every rigger should be able to answer fairly easily.
By March 7th, in that location were 352 responses and we extracted the information for assay. Imagine our surprise when nosotros institute merely 59 individuals (17%) did not miss any of the questions and simply 109 individuals (31%) missed i question.
Meaning the remaining 52% of respondents missed 2 or more questions of a five-question quiz. In our courses, students have to score a 70% or amend in lodge to "pass". If this was a scored quiz, anyone missing two or more questions would non have received a passing form.
What Do These Results Mean?
While OSHA has come up a long way with their requirements to have educated and "qualified" riggers on construction sites as of 2010, we believe that this basic quiz shows room for improvement in the quality of education and training provided to riggers.
At present consider if these were the scores from your organization, maybe it would exist time to consider some training or re-training. If fifty-fifty 1 employee was not able to reply these bones rigging questions correctly, then you may be introducing unnecessary risk into your organization.
What Were The Responses and Correct Answers?
Here are the results of our informal quiz:
While 66% of individuals got this correct, the remaining 44% did not. The correct reply is a) Get out the pivot hand tight.
When using a shackle, the screw pin threads should be fully engaged and tight, so that the shoulder of the pin is flush and makes full contact with the shackle body. Do not back off a quarter/one-half/full turn on the pin earlier utilise.
The reason for this? Shackles take a natural tendency to spread under load. If the shackle pin is not tight, it will permit the shackle body to stretch. Those backing off the shackle pin most probable do and then considering later on use the pin is oftentimes too tight to loosen by paw. That is simply testify of the shackle attempting to stretch. Imagine if the pin was non tight to start with, you accept likely started to introduce stretch into the shackle and over fourth dimension its integrity volition be compromised. If y'all are concerned almost how to easily re-open up the shackle subsequently utilise, accept a tool, such as a white potato wrench, available to insert in the pivot hole and plow to break the tension.
We were glad to note that the majority of responses knew that using at least one blazon of constructed sling material would be a cause for business organization in an acrid environment; however, it is important to know which i. The correct response is b) Nylon.
According to OSHA 1926.251(east)(half-dozen) -"Ecology conditions." When constructed web slings are used, the following precautions shall be taken:
- 251(e)(6)(i) – Nylon web slings shall not be used where fumes, vapors, sprays, mists or liquids of acids or phenolics are present.
- 251(east)(six)(two) – Polyester and polypropylene spider web slings shall not be used where fumes, vapors, sprays, mists or liquids of caustics are present.
- 251(e)(6)(iii) – Web slings with aluminum fittings shall not be used where fumes, vapors, sprays, mists or liquids of caustics are nowadays.
Riggers should know these limitations. It could be a big concern if using a nylon sling in an environment where there were acidic conditions. Information technology could easily result in a sling failure.
Hands down, when you want load security reply d) Double-wrap choker hitch is the correct response, over the other options given and 79% of respondents agreed. A double-wrap choker hitch provides full contact with the load and if more than than ane object is being lifted at a time, it will draw the objects together without dissentious the sling.
As with whatever of these hitches, they should not be used when loads are long or unbalanced. Also hitches must suit to the proper D/d ratio as to not create excess stress in the sling.
This was the question that shocked the states. We expected some variation of responses, only nosotros did not expect merely 36% of respondents to reply correctly with c) 1,000 pounds.
While some may say that a basic rigger doesn't need to know this, we disagree. They may not need to be able to calculate it in item, merely they exercise need to empathize the upshot that angles can have on slings and how they can very easily impact a lift.
The illustration above, adapted from the Crane Tech Qualified Rigger Level 1 Manual, demonstrates how sling stress is distributed beyond slings in diverse configurations for a i,000 lb load.
We were happy to see that the bulk of respondents understood this concept and selected the right reply c) the load may topple.
Past its very nature, the lifting and rigging industry is working against gravity. Every load has both a vertical and horizontal center of gravity. When rigging an object, the eye of gravity must be taken into consideration in club to create a safe lift. Rigging higher up a load's eye of gravity to keep it upright during flight.
Want to Quiz Others?
Are y'all interested to see how your co-workers would practice? The Quiz is notwithstanding online, and can exist found here. Over time, as more individuals take this quiz we hope to see the results improve. If you would like a printable version for your next tailgate condom meeting, e-mail us.
If the results from your team'due south quiz surprise you, then it might be time for some grooming or refresher grooming to maintain the safety of your site. Recall,Safety through Pedagogy is more than our motto, it is our guiding principle. Call 800-290-0007 or contact united states of america for a quote. If you lot want to find more than about our Qualified Rigger Level one, Qualified Rigger Level 2, or the Train-The-Trainer options, click on the links provided.
Source: https://www.cranetech.com/blog/rigging-quiz/
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