BMET CDC SET: B Vol 1.1 QUESTIONS AND ANSWERS RATED A+

BMET CDC SET: B Vol 1.1 QUESTIONS AND ANSWERS RATED A+ What is the primary function of a transformer in an electrical system? To change the voltage level of an electrical signal. What does the term "step-up transformer" refer to? A transformer that increases the voltage from primary to secondary windings. What does the term "step-down transformer" refer to? A transformer that decreases the voltage from primary to secondary windings. What type of current is typically used in transformers? Alternating current (AC). What is the principle behind the operation of a transformer? Electromagnetic induction. 2 What does the turns ratio of a transformer determine? The relationship between the primary and secondary voltages. What is the function of the core in a transformer? To provide a path for the magnetic flux and increase efficiency. What is the role of insulation in a transformer? To prevent electrical shorts and ensure safe operation. What does the efficiency of a transformer depend on? The quality of the core material and the windings. What is the typical material used for the core of a transformer? Silicon steel. How is the voltage induced in the secondary coil of a transformer? By the changing magnetic field created by the primary coil. 3 What happens if a transformer is overloaded? It can overheat and potentially cause insulation damage or failure. What is the purpose of a transformer’s tap changer? To adjust the voltage in the secondary winding. What does a transformer’s primary winding do? It receives the input voltage from the power source. What is the impact of increasing the number of turns on the secondary winding of a transformer? It increases the secondary voltage in a step-up transformer. What is the role of the transformer’s secondary winding? It delivers the output voltage to the load.