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1. Name the three parts of a programmable logic controller (PLC) and explain why the PLC is preferred by designers over electromechanical relays.
2. Medium-voltage circuit breakers operating on system voltages between 600 volts and 15 kilovolts generally contain blow-out coils and a puffer. Describe a puffer.What is its funtion?
3. How is an electrical distribution system protected from lightning strikes? Name and describe the device used and describe its electrical connection to the distribution system it protects.
4. The first step in preparing a primary distribution cable for connection to a transformer, tap box, or other terminal equipment is to remove the semiconducting jacket. The next step is to crimp a flat lug onto the cable connector. List in any order any three of the next six steps in making the connection.
Tick off the material, which is different from the group (A) Constantan. (B) Manganin. (C) Nichrome. (D) Brass. Ans: Tick off the materi
Q. Illustrate simple telephone communication system with circuit and equation of current flow in microphone? Ans: Simple Telephone Communication: In the simplest form of
Calculate the monthly electric bill for TESTU. Metering is as follows: B 00,000 kWHr C 00,000 kVARHr D 0,000 kW peak demand Facilities Charge = $500
Q. (a) Consider a three-phase star or wye half-wave recti?er with a purely resistive load R. Determine: (i) efficiency, (ii) formfactor, (iii) ripple factor, (iv) TUF, and (v) PIV
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Role of Bureau of Energy Efficiency The role of the Bureau of Energy Efficiency is to: Ready standards and labels of appliances and equipment; Develop a list
The method by which electrical signals convey information has been described. Systems components have been selected and interfaced to enable a chosen system to perform a desired o
how does creating a supernode helps solve the problems?
Explain the magnetisation- curves of magnetic materials. The major characteristic of a ferromagnetic substance is domain structure of it. Every crystal of a ferromagnetic subst
explain why entropy of a gas increases with volume and tempearture
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