Q1. Discuss the criteria of the classification of marine high voltage for A.C. and D.C. Systems. Sketch a Ships high voltage distribution system and explain its features. Discuss the various methods of testing the insulation of HV system, Mention the significance of PI test, why 3 terminals insulation testers are used in HV insulation measurements. (16)
Q2. a) Describe the circuit breaker for an A.C. generator using a sketch to show how arcing is controlled. (8)
b) Explain the sequence of events that might occur if the breaker opens on a short circuit and state the check you would require following such event. (4)
c) Give a safe procedure to follow should a main circuit breaker fail to open under fault Condition. (4)
Q3. a) Explain how the efficiency and regulation of a transformer can be assessed by open circuit and short circuit tests? (12) b) What is meant by equivalent resistance. (4)
Username or email address *Required
Password *Required
Note: Entering wrong username in the login form will ban your IP address immediately. Entering wrong password multiple times will also ban your IP address temporarily.
Log in
Lost your password? Remember me
No account yet?
