World Science and Technology – Exercise – 1

7. Which is NOT an acceptable method of distributing small power outlets throughout an open plan office area?

(a) Power Poles
(b) Power Skirting
(c) Flush Floor Ducting
(d) Extension Cords

Answer
Answer : (d)
Explanation
Explanation : 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. Let us discuss.
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8. What will a UPS be used for in a building?

(a) To provide power to essential equipment
(b) To monitor building electricity use
(c) To carry messages between departments
(d) To control lighting and power systems

Answer
Answer : (a)
Explanation
Explanation : 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. Let us discuss.
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9. In the UK, what type of installation requires a fireman’s switch?

(a) Neon Lighting
(b) High Pressure Sodium Lighting
(c) Water Features
(d) Hotel Rooms

Answer
Answer : (a)
Explanation
Explanation : 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.) Let us discuss.
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10. The purpose of choke in tube light is ?

(a) To decrease the current
(b) To increase the current
(c) To decrease the voltage momentarily
(d) To increase the voltage momentarily

Answer
Answer : (d)
Explanation
Explanation : No answer description available for this question. Let us discuss.
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