The three general types of materials used in electrical control systems are:
A) Wire, electrical tape, and batteries.
B) Conductors, semiconductors, and nonconductors.
C) Protons, electrons, and neutrons.
D) Wood, concrete, and oil.
B
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Answer the following statement(s) true (T) or false (F)
1. Soft steel is used for the construction of permanent magnets. 2. A very powerful temporary magnet can be made by placing a bar of soft steel inside a coil of wire carrying an electrical current. 3. If two magnets are brought near each other, like poles will repel and opposite poles will attract. 4. Magnetic lines of force can be blocked or insulated.
A group of data communications devices such as computers, file servers, printers, and an e-mail server that are tied together allowing each to share network resources is referred to as a:
A) WAN B) DCCD C) DDS D) LAN
This note is a specific note placed with general notes and keyed to the drawing with a delta symbol (D):
What will be an ideal response?
How can RFID be used in an RTLS system?
What will be an ideal response?