Question 1

Building services (power distribution): Which of the following is NOT an acceptable method for distributing small-power outlets across an open-plan office? Identify the unsafe/non-compliant approach compared to standard methods like floor boxes and …

Accepted Answer

Concept Safe office distribution uses structured systems (floor boxes, poles, perimeter trunking). Trailing extension leads across floors are a trip/fire hazard and not acceptable for permanent distribution. Final Answer Trailing extension leads run across walkways and under carpets

Question 2

Computer media abbreviations: In computing, the abbreviation 'CD' usually stands for what? Identify the standard optical storage term. Choose the correct expansion.

Accepted Answer

Concept CD stands for Compact Disc, an optical storage medium used for audio (CD-DA) and data (CD-ROM) formats. Final Answer Compact Disc

Question 3

History of email addressing (@ symbol): In which year was the '@' character formally chosen for use in e-mail addresses? Ray Tomlinson selected '@' to separate the user name from the host/computer name on ARPANET. Choose the correct year.

Accepted Answer

Given data Ask: The year the '@' symbol was adopted for e-mail addressing. Concept/Approach Engineer Ray Tomlinson implemented the first networked e-mail between computers on ARPANET and chose the @ symbol to separate user and host names. Step-by-step reasoning • ARPANET experiments began in the late 1960s.• The specific adoption of '@' for addressing occurred in 1971. Common pitfalls Confusing the start of ARPANET (1969) or later RFC formalizations with the actual year of the '@' convention. Final Answer 1971

Question 4

Laser history (first working laser): What was the active medium used in the first operational laser? Identify the gain medium in Theodore Maiman's 1960 demonstration. Choose the correct medium.

Accepted Answer

Given data Pioneer: Theodore H. Maiman, 1960. Concept/Approach The first functioning laser was a solid-state ruby laser, using chromium-doped sapphire (Cr³⁺:Al₂O₃) as the active/gain medium. Reasoning • Gas lasers (He–Ne, CO₂) and Nd:YAG came later; Maiman's breakthrough used synthetic ruby. Final Answer Ruby (Cr³⁺:Al₂O₃) crystal

Question 5

Home electronics (power draw): On average, how much power does a 20–25 inch color CRT television consume? Assume a typical household CRT set from the late analog era. Choose the closest wattage.

Accepted Answer

Given data & assumption Device: 20–25 inch color CRT TV (typical household unit). Concept/Approach CRT sets commonly draw between ~100–170 W depending on size/brightness; a mid-range estimate for 20–25 inch sets is about 150 W. Common pitfalls Confusing standby power (a few watts) with active viewing power; mixing up with modern LCD/LED (typically lower). Final Answer 150 W

Question 6

File formats (images): The '.JPG' extension usually refers to which type of file? Identify the common compressed bitmap image format standardized by JPEG. Choose the correct file type.

Accepted Answer

Concept .JPG (or .JPEG) denotes a JPEG image file, a lossy compressed bitmap format defined by the Joint Photographic Experts Group. Final Answer JPEG image file

Question 7

Laser physics (excitation step): The first step to get output from a laser is to excite the active medium. What is this excitation process called in laser terminology? Choose the correct term.

Accepted Answer

Concept To achieve population inversion, energy is supplied to the gain medium via pumping (optical, electrical, or chemical), enabling stimulated emission. Final Answer Pumping

Question 8

Internet history (Hotmail): Who co-founded Hotmail in 1996 and later sold it to Microsoft? Identify the entrepreneur associated with the e-mail service's creation. Choose the correct person.

Accepted Answer

Concept/Approach Hotmail was co-founded by Sabeer Bhatia and Jack Smith in 1996; it was acquired by Microsoft in 1997. Final Answer Sabeer Bhatia

Question 9

EDA history (circuit simulation): In which decade was the SPICE simulator introduced? Consider its early UC Berkeley releases used for analog circuit analysis. Choose the correct decade.

Accepted Answer

Concept SPICE originated at UC Berkeley; early public versions (e.g., SPICE1/2) appeared in the 1970s, becoming foundational for analog simulation. Final Answer 1970s

Question 10

File formats (video): The '.MOV' extension usually refers to which type of file? Identify the multimedia container associated with Apple's ecosystem. Choose the correct file type.

Accepted Answer

Concept .MOV is the default extension for Apple QuickTime container files, which can hold video, audio, and metadata streams. Final Answer QuickTime video/movie file

Question 11

Radio spectrum (HF band): What frequency range defines the High Frequency (HF) band? Provide the ITU/RF engineering standard limits. Choose the correct range.

Accepted Answer

Concept The ITU designates HF as 3–30 MHz, supporting skywave propagation and long-distance communication. Final Answer 3 MHz to 30 MHz

Question 12

Network scope (geography): What do we call a network whose elements are separated by distance, usually interconnecting two or more small networks via high-speed lines? Identify the standard term in networking. Choose the correct type.

Accepted Answer

Concept A WAN links multiple LANs across cities/countries using leased lines, MPLS, or the public Internet. Final Answer Wide Area Network (WAN)

Question 13

Consumer video (VCR format): The most common home video recorder format was VHS. VHS stands for what? Choose the correct expansion.

Accepted Answer

Concept VHS expands to Video Home System, the dominant consumer videotape format introduced by JVC. Final Answer Video Home System

Question 14

Data operations: What is the term for instructing a computer to arrange information numerically or alphabetically? Provide the standard data-processing verb. Choose the correct term.

Accepted Answer

Concept To order data ascending/descending (numeric, alphabetic, or custom keys) is to sort the records. Final Answer Sort

Question 15

Television inputs (signal band): The antenna/cable input to a TV set uses signals in which frequency category? Identify the standard term used for these input frequencies. Choose the correct category.

Accepted Answer

Concept TV tuners accept RF signals (VHF/UHF bands) via antenna or cable; these are then converted to intermediate frequency inside the set. Final Answer Radio frequency (RF)

Question 16

Laser categories: Which set correctly lists three broad types of lasers by gain medium? Identify a representative coverage of common laser classes. Choose the correct set.

Accepted Answer

Concept Lasers are commonly grouped by their gain medium: gas (e.g., He–Ne, CO₂), solid-state (e.g., ruby, Nd:YAG), and semiconductor diode lasers. Final Answer Gas lasers, solid-state lasers, and semiconductor (diode) lasers

Question 17

Amateur radio history: In which decade was the ARRL (American Radio Relay League) founded? Recall the origin period of the US national association for amateur radio. Choose the correct decade.

Accepted Answer

Concept The ARRL was founded in 1914 by Hiram Percy Maxim and Clarence Tuska, placing its origin in the 1910s. Final Answer 1910s

Question 18

Television standards (USA): Which broadcast standard has historically been used in the United States? Consider the legacy analog standard used prior to digital transition. Choose the correct standard.

Accepted Answer

Concept The legacy US analog TV standard was NTSC. (Digital broadcasting later adopted ATSC, but exam questions typically reference the analog era.) Final Answer NTSC

Question 19

Tech headquarters: Where is Intel's corporate headquarters located? Identify the California city associated with Silicon Valley. Choose the correct location.

Accepted Answer

Concept Intel is headquartered in Santa Clara, California, in the heart of Silicon Valley. Final Answer Santa Clara, California

Question 20

CRT television (EHT): In a color TV with a picture tube, approximately what high voltage accelerates the electron beams? Assume a typical consumer CRT set. Choose the closest voltage.

Accepted Answer

Concept Color CRTs use EHT (extra-high tension) of roughly 20–30 kV; a standard nominal value is about 25 kV. Final Answer 25 kV

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