WorksheetsLubricating system wrong and mixed
Total questions: 11
Worksheet time: 6mins
Most of the world’s deep sea trading vessels are powered by:
High speed four stroke engines
Steam turbines
Medium speed 4 stroke engines
Slow speed two stroke engines
Why is the cross head bearing on two stroke diesel engine is difficult to lubricate?
Water can get through from the rudder
The connecting rod stops adequate lubrication reaching the surfaces
Oscillating movement prevents a dynamic oil film being formed
It is very large and heavy
How fast does a slow speed 2 stroke engine go?
10-30 rpm
500-800 rpm
30-50 rpm
18-300 rpm
What is the primary fuel source for most deep sea trading vessels?
Electricity
Coal
Diesel
LNG
At what speed does a medium speed 4 stroke engine typically operate?
100-300 rpm
500-800 rpm
30-50 rpm
10-20 rpm
What is the main challenge in lubricating the cross head bearing on a two stroke diesel engine?
Water ingress from the propeller
The large size and weight of the bearing
Oscillating movement preventing proper oil film formation
Excessive heat generation
What is the primary purpose of the cooling system on a ship's engine?
Generate electricity
Regulate fuel consumption
Remove excess heat from the engine
Which type of cooling system is commonly used in marine applications to cool engine components?
Air cooling
Liquid cooling
Passive cooling
In a jacket water cooling system, what is the primary coolant for the engine?
Seawater
Freshwater
Air
Which cooling system is commonly found in large ocean-going vessels with powerful engines?
Keel cooling
Evaporative cooling
Closed-loop liquid cooling
In a dual-purpose cooling system, what is the second function besides cooling the engine?
Power generation
Fuel purification
Heating accommodations
