Magnetic Contactor A magnеtic contactor is an еlеctrical switching dеvicе that usеs a coil to gеnеratе a magnеtic fiеld, which in turn controls thе opеning and closing of еlеctrical contacts. It is commonly usеd to control thе flow of еlеctrical … Continued
Automatic Transfer Switch (ATS) An automatic transfer switch (ATS) circuit is often used to switch between two power sources. The primary power source is usually the utility grid or mains power, while the secondary power source is usually a backup … Continued
Electrician,Building Electrician job Interview Questions & Answers
Q#1 In clay soil (A) Swelling and shrinkage characteristics prevail (B) Consolidation continues even after several years of construction (C) Differential settlement is generally prevalent (D) All the above Ans: D Q#2. Dutch bond is a modification of (A) English … Continued
1) Why is AC transmission preferred over DC transmission? Answer. 2) What is the difference between the Transmission line and distribution line? Answer. Transmission lines are used for carrying electric power from power stations to the substations. Distribution lines are … Continued
Plumbing TRAPS: A trap is a device which is used to prevent sewer gases from entering the buildings. The traps are located below or within a plumbing fixture and retains small amount of water. These are available in cast iron, … Continued
Distribution Board An electrical distribution board is easy in that it can be used by different areas of the building as long as a switch dis-connector operates each board. For example, a particular DB board may be used for the … Continued
Electrical Wiring Electrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, sockets, and light fittings in a structure. Types of Electrical Wiring Systems 1. Cleat Wiring: This wiring system wire is braided and … Continued
1. Ohm’s Law states that, a) I=VR b) V=IR c) R=VI d) All of the above As per ohm Law Current is directly proportional to Voltage. Ans.b 2. The SI unit of Current, Voltage, Resistance, Power, Capacitance, Inductance, Frequency a) … Continued
