Electronics Quiz, KBC Quiz, KBC Questions, Multiple Choice Question Answers

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

1. Power Poles
   
2. Power Skirting
   
3. Flush Floor Ducting
   
4. Extension Cords
   

Incorrect Answer

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.

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Question: Which of the following is an international protocol for lighting control?

1. Lite-con
   
2. DALI
   
3. IPLC
   
4. Prolicon
   

Incorrect Answer

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.

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Question: In the UK, what type of installation requires a fireman's switch?

1. Neon Lighting
   
2. High Pressure Sodium Lighting
   
3. Water Features
   
4. Hotel Rooms
   

Incorrect Answer

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.)

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Question: What will a UPS be used for in a building?

1. To provide power to essential equipment
   
2. To monitor building electricity use
   
3. To carry messages between departments
   
4. To control lighting and power systems
   

Incorrect Answer

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.

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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?

1. Transformer
   
2. Transponder
   
3. Transducer
   
4. Converter
   

Incorrect Answer

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.

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Question: What is the relationship between resistivity r and conductivity s?

1. R = s2
   
2. R = s
   
3. R > s
   
4. R = 1/s
   

Incorrect Answer

Correct Answer

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