Answer Posted / t.sathish kumar

moulded case circuit breaker,residual current circuit
breaker

Which device is used for the source of emission of electrons in a crt?

1203

---

before synchronizing an alternator,power factor is leading ,why?

1498

---

What is the difference between electronic regulator and ordinary rheostat regulator for fans?

960

---

how to get electrical supervisour certificate in gujarat

1907

---

What is Anemometer used to measure?

1074

---

we are having 15kw and 3kw motor both can run in same time , instead of using copper we are using ug aluminium cable , 35 sq.mm is suitable for its current carrying capacity..?

1682

---

1. Can a 12v DC choke operate a 60v/12w PL lamp ? 2. Can a 230v ballast fire / operate a 60v/12w PL lamps.

2140

---

What OPGW is better than Microwave or PLCC???

4082

---

What will happen if we introduce negative feedback to a control system that uses a positive feedback?

1045

---

How out of step protection relay works?

2346

---

A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

1055

---

wow to calculate the transformer rating(KVA)

2204

---

In three pin plug 6 amp. 220V ac rating. Why earth pin diameter is higher than other two pin? What its purpose ?

1172

---

Why are the cores of large transformers built up of circular transactions ?

1965

---

How can we select suitable capacity generator for three phase load (inductive load) and how to take study analysis in 3 three phase load system ?

2098

---