PATAG NALANG NG IBA Assignment in Electro Technology II Electro314L3 To be submitted right after midterm exams to be written on your filler notebook size. Midterm: A. AC Generators 1. Draw an AC Generator and Label its parts a. Draw an exploded view of each section that contains the parts of an AC Generator. 2. What is Flemming’s Hand rule? 3. What is root-mean-square and how does it is applied on generators? 4. What is phase difference? 5. Excitation a. Purpose of excitation b. Types of excitation c. Working principles of excitation 6. Voltage Regulator a. What is a voltage regulator? b. How does it work? 7. Synchronization a. What is synchronization? b. Purpose of synchronization. c. Ways of synchronization d. Equipments used in synchronization 8. Load sharing a. How do we adjust load sharing between two or more generators? 9. Emergency Switch board a. What is an emergency switchboard? b. Where it is usually located? c. How and how often do we test emergency generators? B. DC Generator 1. Draw a DC Generator a. Exploded view of sections and parts b. Label of parts 2. Define the parts of a DC Generator 3. How DC generator does differ from AC Generator? 4. What are the two types of winding used on armatures of a DC Generator? C. Shipboard Power distribution System 1. Discuss how power is distributed on board typical ships. 2. What are the types of circuit breakers and where on the distribution system these breakers are used? 3. Why some breakers on board have interlocks? 4. List down the essential equipments on board vessel that must be prioritized to be supplied by power. 5. Define the following: a. Main generators b. Emergency generators c. Shore supply d. Battery supply e. 440V Supply f. 220V Supply g. Circuit breakers h. Transformers D. Insulation 1. Define insulation. 2. What are the common causes of insulation failures on cables? 3. What are the factors that affect the readable value of insulation? 4. How important is taking values of insulation resistance from cables and electrical equipments? 5. How temperature does affect the insulation? E. Transformers 1. Enumerate how transformers are being cooled? 2. Why transformers need cooling? 3. How does transformers are being connected? 4. How do we conduct shore connection? F. AC Motors 1. Draw an illustration of an AC Motor and name its parts? 2. Define each part of an AC Motor. 3. What are the types of motor enclosure and where do we apply each type? 4. What is the relationship between the speed and the current being drawn by the motor? 5. What is slip? G. DC Motors 1. Draw and illustration of a DC Motor and name its parts? 2. How does a DC motor differ to an AC Motor? 3. What is back emf and how does it affect the operation of a DC motor? 4. Name ways on how can we adjust the speed on a DC motor. 5. Define: a. Shunt Motor b. Series motor c. Long shunt d. Short shunt e. Commutatively connected H. Electrical Motor Starting Methods 1. State how does a DC motor being started using the following methods: a. Starting rheostat b. Automatic starter 2. State how does an AC motor being started using the following methods? a. Direct-on Line b. Star-Delta c. Compensator 3. What are the things that we need to consider in selection of motor starting method? 4. Differentiate fault current to overload current. 5. Define the following: a. Over-current Trip b. Over-Voltage Trip c. Fuse d. Thermal Relay 6. What is single phasing and what are its effect on: a. Running motor b. Starting motor 7. How can an infinitely variable speed control can be made on motors? 8. What is Ward-Leonard Drive? 9. Explain the Principle of Variable Frequency Control.
Posted on: Tue, 02 Dec 2014 09:56:25 +0000
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