Displaying 31 to 36 of 36 Questions. You are on Page No. 4 of total 4 pages
Question: Which is NOT an acceptable method of distributing small power outlets throughout an open plan office area?
Correct Answer Extension cords can be a tripping hazard, and can be easily damaged, causing an unsafe situation. There are many ways of safely getting power to each work place, where wiring is protected and concealed.
Question: Which of the following is an international protocol for lighting control?
Correct Answer DALI stands for Digital Addressable Lighting Interface, and was developed as an industry standard. All leading electronic control gear manufacturers, such as Osram, Philips and Helvar, abide by this protocol, which allows for interchangeability of elements.
The other terms are made up.
Question: In the UK, what type of installation requires a fireman's switch?
Correct Answer Neon lighting runs at a high voltage, typically above 1000 Volts. A fireman's switch protects a fireman from receiving a shock when a water jet is sprayed onto the installation. The switches are red, and mounted in a conspicuous position. (This is specified by IEE Regulations (Europe), SANS (South Africa), UK Electricity regulations and many Asian countries. I am unable to confirm other countries' requirements, so feel free to let me know.)
Question: What will a UPS be used for in a building?
Correct Answer UPS stands for Uninterruptible Power Supply. Examples of equipment that may require a UPS supply are computers, fire detection systems, hospital operating theatre equipment and escape route lighting.
Question: Larger buildings may be supplied with a medium voltage electricity supply, and will required a substation or mini-sub. What is the main item of equipment contained in these?
Correct Answer The transformer is used to transform a medium voltage supply to a low voltage supply, e.g. from 11 000 V to 400 V. A transformer is rated in kVA, kilo-Volt-Amps, which is a measurement of electrical power.