Q- Which of the following will lead to automatic stopping of IG blower?
a. Low water level in deck water seal.
b. Oxygen content above 8%.
c. Low water level in scrubber tower.
d. High water level in scrubber tower.
Answer-A & C
A. Increasing the atomization pressure of fuel injectors
B. Fitting exhaust valves with valve rotators
C. Running engine at or near normal sea load
D. Decreasing the F.O. purifier feed rate , running two purifier in series one acting as purifier and other as calrifier
Q- Viscosity of fuel oil used for ME was 145cst,new fuel comes whose viscosity was more than earlier, what should u do
a) increase temp setting
b) change setting of viscotherm
c) do nothing
d) open steam valve manually more
Answer-Critical Question(it could be anything)
Q- Main engine is running but viscosity of fuel cannot be maintained.fuel oil heater have a maximum rating of 4 bar steam pressure.steam through a pressure reducing valve is provided to the heater at 4 bar but still viscosity of fuel annot be brought down below 20 cst. as a good marine engineering practice what will you do?
a. let the engine run at same rpm n wait for the port to come to carry out the cleaning of heater
b. reduce the rpm till next port arrives n then clean the heaters
c. increase the steam pressure by adjusting the setting of steam reducing valve
d. stop the engine n clean the heaters
Q-When one of the M/E.F.O. heater is not in use then
A) The F.O. inlet n outlet valve should b kept shut, but steam heating valves should b kept crack open so as to keep the heater warm.
B) F.O. inlet n outlet valve should b kept shut n heating valves also should b completely shut n should b drained of any remaining F.O.
c) F.O. inlet n outlet valve should b kept crack open so that the F.O. recirculation can take place.
d) F.O. inlet n outlet valve should b kept shut while outlet valve should be left open so that
Q- Which of the following can lead to sudden stopping of a diesel engine?
A. Air in fuel supply line
B. Water in fuel supply line
C. Obstruction in air filter p>D. Water in the air filter
Answer-A,B and C
Q- In modern marine 2-stroke diesel engines, ________________ is sometimes used as a coating on the underside of the exhaust valve disc, to reduce the rate of hot corrosion