ELECTRICAL ENGINEERING EXAM QUESTIONS AND ANSWERS 100% CORRECT!!!

What is TNC grounding - ANSWER system is characterized by the combination of functional and protective neutral conductors. A classical TN-C system is a traditional four-wire power supply circuit with three phases and one neutral wire. What is grounding? - ANSWER This is achieved by providing a low-resistance connection to the ground, which helps to dissipate electrical current and prevent electrical shocks or fires What is TNS? - ANSWER TN-S systems have a single neutral-to-earth connection, placed as near as possible to the supply transformer and separate supply cables throughout. In low voltage supplies the transformer can even be connected to the sheath of the supply cable which will give a separate route back to the sub-station transformer. What is TNCS grounding - ANSWER A TN-C-S earthing system is a single source of supply with direct connection of the source with Earth at one or more points (denoted by the first letter T) and exposed- conductive-parts of the installation are directly connected by a protective conductor with the source earth (denoted by the second letter N). What is an Alternator? - ANSWER A synchronous rotating AC machine used to change mechanical power into electrical power (alternating current - AC). What is a voltage regulator? - ANSWER A device that controls the strength of a magnetic field produced by a generator or alternator. What is an actuator - ANSWER An end device of a control system, that manipulates a physical variable such as a valve opening or position of a machine part. What is an ammeter used for? - ANSWER An instrument that measures electric current. Capicitor - ANSWER An electrical component that stores energy in an electric field. What is an anode? - ANS