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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.
Explain the OR Gates - microprocessor? The OR GATE has high or logic 1 output if any of the inputs are high. The output Q is true if input A OR input B is true (or both of t
Q. The total core loss for a specimen of magnetic sheet steel is found to be 1800 W at 60 Hz. When the supply frequency is increased to 90 Hz, while keeping the flux density consta
Q. With a neat circuit diagram explain the working of a Hartley oscillator using an npn transistor and obtain the expression for oscillation frequency and for minimum gain for sust
Q. Binary Coded Decimal Addition Now as in conventional decimal addition, Binary Coded Decimal addition is performed one decimal digit at a time. What happens when the sum g
Positive Edge Triggered D Flip Flop In this type of D flip Flop ( 7475) shown in figure the output changes with positive edge of the CLK when CLK changes from 0 to 1
Constant Frequency System In this system chopping period T is kept constant but the on time T om is varied. This system is also referred to pulse with modulation or time
Functions of Regulatory Body Set standards through setting codes, by miscellaneous orders, by license conditions and by directions in tariff orders; Determine the tari
Explain FET amplifiers? Just like the BJT amplifiers, FET amplifiers are constructed in common-source (CS, analogous to CE), common-drain (CD, analogous to CC), and common-gate
proof of Norton theorem
Working out the function of a combination of gates? Truth tables are able to be used to work out the function of a combination of gates. Inputs Outputs
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