Q1. With reference to the operation of main propulsion engines, outline the importance of EACH of the following:
(a) Maintaining the temperature of the scavenge air above the dewpoint (4)
(b) Maintaining the fuel at the correct viscosity for injection (4)
(c) Regular on board testing of the lubricating oil (4)
(d) Ensuring rotation of exhaust valves (4)
Q2. (a) Describe, with the aid of a sketch, the operational principles of a main engine exhaust gas turbo-charger. (10)
(b) State the function of EACH of the following turbo-charger system components:
(i) Suction filters (2)
(ii) Exhaust grids (2)
(iii) Charge air cooler (2)
Q3. (a) Explain how high viscosity fuel oil is treated prior to entering the main engine. (8)
(b) State the changes in the fuel preparation required when changing to a fuel of lower density and viscosity. (8)
Q4. With reference to main starting air compressors:
(a) State THREE maintenance procedures that maintain their efficiency: (6)
(b) Describe the procedure for the manual starting of a compressor. (10)
Q5. List FOUR safety or alarm devices fitted to an automatically controlled auxiliary boiler indicating how EACH of these devices may be tested. (16)
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?
