Exam (elaborations)
Electrical Safety Assessment: Questions & Solutions
- Course
- Institution
Electrical Safety Assessment: Questions & Solutions
[Show more]
Content preview
Electrical Safety Assessment: Questions & SolutionsA consumer unit or distribution board is used to: Right Ans - Provide
distribution and overload protection for final circuits
A main protective bonding conductor is used to: Right Ans - Connect
extraneous conductive parts (such as metal water pipes) to the main earthing
terminal of the installation
A miniature circuit breaker (MCB) is used to: Right Ans - Provide overload
and short circuit protection for electrical circuits
A Permit to Work procedure is a formal written system used to control the
work by means of potential hazards identification and: Right Ans - A risk
assessment
A permit-to-work system must be used: Right Ans - For all work on live
electrical systems
A residual current device is designed to operate in the event of one of the
following: Right Ans - Earth fault
A rewireable fuse will carry an overload current of 50% more than the fuse
rating for approximately Right Ans - 3-4 hours
A risk assessment should be reviewed Right Ans - When any change to the
task or environment takes place
A risk assessment should include consideration of what in your business
might cause harm and how and, the people who might be affected. This should
include: Right Ans - All people who might be affected
A safe system of work is a formal procedure which results from systematic
examination of a task in order to identify all the hazards. It defines safe
methods to ensure: Right Ans - "that hazards are eliminated, or risks
minimized"
A socket in an enclosure to IP 66 can be used for Right Ans - An outside
installation
, A standard (BS1363 or IEC60309) switched socket outlet is used to: Right
Ans - To easily plug a piece of equipment into the electrical supply
A switched fused connection unit is used to: Right Ans - Wire directly into
the final circuit to feed a piece of equipment
A test simulating a fault condition would be used when testing? Right Ans -
Residual current devices
An IEC60309 industrial connector is used in preference to a BS1363 square
pin connector when: Right Ans - For higher-current or 3-phase
applications
Compared with low-current equipment, a piece of equipment that draws a
large-current needs: Right Ans - A larger cable
Earth fault loop impedance should be Right Ans - As low as possible
Extraneous-conductive-parts require protective equipotential bonding to
ensure that? Right Ans - No dangerous potential difference can occur
Fuses are preferable to Miniature Circuit Breakers (MCBs) when: Right Ans
- Very high prospective fault currents may occur
How do you calculate the current drawn by a single-phase mains-powered
device given its power rating Right Ans - Divide the power rating by 230V
If a fuse blows again after being replaced the correct procedure is Right
Ans - Isolate the circuit or device, then trace and rectify the fault
If the hazards of a task can not be eliminated then the next best control is:
Right Ans - A safe system of work
If you are asked to install a piece of electrical equipment that you have never
seen before you should: Right Ans - Do not install it and hand the work
over to someone who has the correct knowledge or experience.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Zendaya. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67163 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now