## Technology Questions and Answers Part-9

1. Compact discs, (according to the original CD specifications) hold how many minutes of music?
a) 74 mins
b) 56 mins
c) 60 mins
d) 90 mins

Explanation: According to many stories surrounding the origin of the compact disc, 74 minutes was settled on because it would comfortably contain all of Beethoven's 9th symphony on one disc. Although some stories reference a specific Sony higher-up who claimed this as his favorite piece of music, stories differ. All that's known for sure is that Sony insisted on this and won out over Phillips' original 60 minute proposal.

2. Once the active medium is excited, the first photons of light are produced by which physical process?
b) Spontaneous emission
d) Planck's oscillation

Explanation: Spontaneous emission is what you see with most "glow in the dark" toys. You excite the toy by exposing it to bright light, then the toy glows in the dark by spontaneously emitting photons as the excited atoms relax back down to their normal state.

3. 'DTP' computer abbreviation usually means ?
a) Digital Transmission Protocol
b) DeskTop Publishing
c) Data Type Programming
d) Document Type Processing

Explanation: No explanation is given for this question

4. The average power (in watts) used by a 20 to 25 inch home color television is...?
a) 70-100
b) 25-50
c) 500-800
d) Over 1000

Explanation: About the same as as the most popular light bulb size.

5. What does AC and DC stand for in the electrical field?
a) Alternating Current and Direct Current
b) A Rock Band from Australia
c) Average Current and Discharged Capacitor
d) Atlantic City and District of Columbia

Explanation: Electricity is voltage and current. Voltage is electrical pressure, and current is the flow of charged particles. The difference between alternating current (AC) and direct current (DC) is that the electrons in an AC circuit regularly reverse their direction. In a DC circuit electrons always flow in the same direction.

6. In which year was MIDI(dress) introduced?
a) 1987
b) 1983
c) 1973
d) 1977

Explanation: No explanation is given for this question

7. What does the term PLC stand for?
a) Programmable Lift Computer
b) Program List Control
c) Programmable Logic Controller
d) Piezo Lamp Connector

Explanation: Used in manufacturing, engineering, and process operations.

8. When measuring the characteristics of a small-signal amplifier, say for a radio receiver, one might be concerned with its "Noise..."?
a) Fundamental
b) Fall
c) Force
d) Figure

Explanation: "Noise figure" is one critical parameter for determining the "quality" of a low-noise, small-signal, amplifier, and perhaps more importantly, the sensitivity of the overall receiver system. It is especially important for VHF (very high frequency) - and higher frequency - designs where most of the undesired "noise" (noise that masks or overpowers the desired signals) is generated internal to the electronics itself. In HF (high frequency) applications, atmospheric noise plays a much larger role in determining overall useful sensitivity, so a circuit's "noise figure" is less important.

9. 'DB' computer abbreviation usually means ?
a) Database
b) Double Byte
c) Data Block
d) Driver Boot

Explanation: No explanation is given for this question

10. '.INI' extension refers usually to what kind of file?
a) Image file
b) System file
c) Hypertext related file
d) Image Color Matching Profile file