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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.
Q Consider a three-phase, full-wave bridge recti?er, as shown in Figure, with a purely resistive load R. For each diode, determine: (i) efficiency, (ii) form factor, (iii) ripple f
Explain the ASCII Character Set? Most programming languages have a means of defining a character as a numeric code and, conversely, converting the code back to the character. ASC
Give the names of four alloys along with their composition, which are used for making heater and thermocouple elements. Constantan or Eureka {(55 to 60 percent) Cu, (45 to 40 p
A preliminary design with ideal resistors, inductors and capacitors, will get 25 marks. If the design does not meet the specifications then one mark will be deducted following the
Hexadecimal to Binary Conversion Conversion from hexadecimal to binary is the reverse of this process. Express each hexadecimal digit in four bit binary equivalent
Define Shunt VAr Compensation? Shunt capacitors absorb leading VArs (i.e. they are used to supply lagging VArs) whereas reactors are used to absorbs lagging VArs. Capacitors an
Q. Give applications of emitter follower The emitter follower has the following principal applications: 1. To provide current amplification with no voltage gain 2. Impede
Define Magnetic field The area around a magnet is known as the magnetic field and it is in this area that the effects of the magnetic force formed by the magnet can be detected
Explain what is Linker? Linker: A huge program is divided in smaller programs termed as modules. A linker is a program that links smaller programs together to by a large prog
Q. Explain working of Bipolar junction transistors? The family of bipolar junction transistors has two members: the npn BJT and the pnp BJT. Both types contain semiconductor ju
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