In which decade was the American Institute of Electrical Engineers (AIEE) founded?
Answer: B
The AIEE was founded in the 1880s - in 1884, in New York.
Its early members included Edison, Bell and Westinghouse. It merged with the Institute of Radio Engineers in 1963 to form the IEEE.
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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?
Answer: A
The main item in a substation is a transformer.
It steps the medium-voltage supply, typically 11 kV, down to the 400/230 V used in the building. Transformers work only on alternating current, which is why AC won the battle of the systems.
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Blue is what number on the resistor color code?
Answer: D
Blue is 6 on the resistor colour code.
The sequence is black 0, brown 1, red 2, orange 3, yellow 4, green 5, blue 6, violet 7, grey 8, white 9. The first two bands give the digits, the third the multiplier and the fourth the tolerance.
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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.
Answer: C
A network whose parts may be separated by great distances is a wide area network.
A WAN links two or more local networks over leased lines, microwave or satellite. The internet is the largest WAN of all.
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'.MOV' extension refers usually to what kind of file?
Answer: B
A .MOV file is a movie file.
It is Apple's QuickTime container format, introduced in 1991, holding video, audio and text tracks together. Much of the MOV specification became the basis of the MPEG-4 file format.
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What are three types of lasers?
Answer: D
Three types of laser are gas, solid state and diode.
Gas lasers such as helium-neon and carbon dioxide use a gas discharge; solid state lasers use a crystal such as ruby or Nd:YAG; and diode lasers use a semiconductor junction, which is what is in every CD player and laser pointer.
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In the United States the television broadcast standard is?
Answer: B
The United States television broadcast standard was NTSC.
It used 525 lines at 30 frames a second. PAL was the European standard at 625 lines and 25 frames, and SECAM was used in France and the Soviet bloc.
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'.BAK' extension refers usually to what kind of file?
Answer: A
A .BAK file is a backup file.
Many programs rename the previous version of a document to .BAK before saving the new one, so that the last good copy survives a crash or a mistaken edit.
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Voltage is sometimes referred to as EMF, or Electromotive...?
Answer: D
EMF stands for electromotive force.
Despite the name it is not a force but an energy per unit charge, measured in volts. It is the work a source such as a cell or generator does in driving a unit charge round the circuit.
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"FET" is a type of transistor, Its full name is ________ Effect Transistor?
Answer: A
FET stands for field effect transistor.
The current between source and drain is controlled by the electric field of the voltage on the gate, which draws almost no current. That high input impedance is why FETs, and MOSFETs in particular, are used in almost all integrated circuits.
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