Technology general knowledge questions

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66. 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?
A. Transformer B. Transponder
C. Transducer D. Converter

Answer: Option A

Explanation:

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.
67. What was the active medium used in the first working laser ever constructed?
A. A diamond block
B. Helium-neon gas
C. A ruby rod
D. Carbon dioxide gas

Answer: Option C

Explanation:

Theodore Maiman built the first working laser using a ruby rod while working at Hughes Research Laboratories in Malibu, California. It lased for the first time on May 16, 1960.
68. What does EPROM stand for?
A. Electric Programmable Read Only Memory
B. Erasable Programmable Read Only Memory
C. Evaluable Philotic Random Optic Memory
D. Every Person Requires One Mind

Answer: Option B

Explanation:

A chip found in alomst every microprocessor…
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