General Science Short Q&A

Questions
Answers
1. After the first photons of light are produced, which process is responsible for amplification of the light in LASER?
Stimulated emission
2. In a color television set using a picture tube a high voltage is used to accelerate electron beams to light the screen. That voltage is about?
25 thousand volts
3. In an atomic explosion, enormous energy is released which is due to
conversion of mass into energy
4. In which decade was the American Institute of Electrical Engineers (AIEE) founded?
1880s
5. In which year was MIDI (Musical Instrument Digital Interface) introduced?
1983
6. Isotopes are separated by
Distillation
7. Made from a variety of materials, such as carbon, which inhibits the flow of current?
Resistor
8. Mesons are found in
Cosmic Rays
9. Most modern TV’s draw power even if turned off. The circuit the power is used in does what function?
Remote control
10.Sometimes computers and cache registers in a food mart are connected to a UPS system. What does UPS mean?
Uninterrupted Power Supply
11.The electromagnetic coils on the neck of the picture tube or tubes which pull the electron beam from side to side and up and down are called a
Yoke
12.The first step to getting output from a laser is to excite an active medium. What is this process called?
Pumping
13.The most common format for a home video recorder is VHS. VHS stands for?
Video Home System
14.The sampling rate, (how many samples per second are stored) for a CD is?
44.1 kHz
15.What do we call a network whose elements may be separated by some distance? It usually involves two or more small networks and dedicated high-speed telephone lines.
WAN (Wide Area Network)
16.What does VVVF stand for?
Variable Voltage Variable Frequency
17.When measuring the characteristics of a small-signal amplifier, say for a radio receiver, one might be concerned with its “Noise”?
Figure
18.Which among the following is a positively charged particle emitted by a radioactive element?
Alpha Rays
19.Which is NOT an acceptable method of distributing small power outlets throughout an open plan office area?
Extension Cords
20.Which of the following is used as a moderator in nuclear reactor?
Graphite
21.Who is largely responsible for breaking the German Enigma codes, created a test that provided a foundation for artificial intelligence?
Alan Turing
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