List the different devices and components of main switchboard.

2414

---

How do you detect earth by lam p?

1822

---

How do you reset the circuit breaker?

1916

---

What is the purpose of ventilation in the battery room?

1942

---

What are the usual checks when induction motor is running?

2026

---

Methods to dry up wet induction motors?

1995

---

The lowest allowable insulation resistance?

1873

---

What is space heater?

1801

---

What is hertz in electrical system?

1986

---

Draw a parallel circuit with one battery and two resistors. Derive the formula for resistance?

1859

---

Define earth lamp?

1948

---

What is the use of multi tester?

1874

---

"How to check the diode, fuse and bearer switch?"

2053

---

What is the formula to determine the speed of induction motor?

1873

---

Name the four most important components of a Freon refrigeration system.

1916

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