Answer Posted / pratheesh

I dont know excatly the use of end off line resistor in
Fire alarm system.

But in communication system(Profibus) we use end off
line resistor. In this system, all the communication
devices connected to the same bus in parallel. The bus
having only 2 wires and all the devices connected to
this same 2 wires in parallel.. And each communicator
devices have one address in that bus. Thats how the
server identifies the signals from that particular
device. So the extreme end of this bus cannot be kept
open. By providing an End Off Resistance, server can
know that this is the end of the bus and there is no
devices from that particular point.

How energy is generated in hydroelectric power plant?

1355

---

I am shobana from Chennai. I am having my personal interview on 19th Dec at Chennai.kindly mail me the questions to mail id shobana.shanthi@gmail.com

2422

---

What are n circles?

1139

---

how can we phase identification in a distribution line,how we recognise that which phase is coming for a house hold connection.help me............

2133

---

How is the speed of a DC shunt motor related to the armature current?

1232

---

Is the installation of the filter cloths necessary before spreading the gravels at the transformer yards?

1983

---

To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?

1970

---

how to calculate magnetic force genrated by a coil ?

2256

---

What is the effect of pi controller on the system performance?

1173

---

How to test lightning Arrester?

979

---

What type of wiring series or parallel is used for conventional and addressable type FAS & why?

1851

---

What is turn ratio of a transformer?

1299

---

Explain what are inter-poles and why they are required in a dc machine.

1141

---

State kirchoff voltage law?

1177

---

briefly explain the main blocks found in a microprocessor based system

2249

---