Welcome to the website where you can pass online the CES CBT CD-0484 test on the subject «Diesel Engine Diagnostics». Practice like this will help you as a marine specialist improve your knowledge with the help of online studying and appraisal practice. CES based on practical information and marine specialists experience.
CES tests developed for evaluating seaman basic knowledge by Seagull Company (rebranded as «OTG»), is an evaluating online-tool, used for revealing any professional preparation needed in specific fields of knowledge, defined by STCW.
CES tests have proven themselves as good tools for the selection and recruitment process, as well as advancing the level of knowledge of the current officers and crew. Ocean Technologies Group use various subjects for question creation, which includes:
Crowd and Crisis Management;
Integrated Navigation System (INS);
Ballast water management;
Handling and Stowage;
Vessel operation management and safety;
Marine engineering;
Maintenance and repair, etc.
Current test contains Seagull CES questions on the subject «Diesel Engine Diagnostics». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«Diesel Engine Diagnostics» subject includes theoretical and practical information about advanced training for work on any type of vessel. Diesel engine diagnostics training provides knowledge and skills for identifying and resolving issues in marine diesel engines. The course covers advanced diagnostic techniques, including interpreting engine performance data and analyzing fault codes. Participants learn to use specialized tools and equipment to inspect, test and maintain diesel engines on various types of vessels. Emphasis is placed on understanding engine systems, such as fuel injection, lubrication, cooling and exhaust systems. Practical exercises include troubleshooting common engine problems, performing routine maintenance and implementing repair solutions. The training ensures compliance with international maritime standards, preparing crew members to handle complex engine systems safely and efficiently. By mastering diesel engine diagnostics, participants improve vessel performance, reduce downtime and enhance operational reliability.
On this site Crew Evaluation System Test on the subject «Diesel Engine Diagnostics» contains 31 questions you need to answer with no possibility to go back to previous question. Therefore, we recommend carefully reading each question and making decision with no hurry. In case you have some difficulty answering, you have also possibility to request a hint.
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* Some questions may have more than 1 correct answer.
A decreased pH of the main lubricating oil has been observed. What are the TWO most likely causes? Select the TWO correct answers.
Faulty stuffing box.
High sulphur content in the fuel.
High TBN of the cylinder oil.
Low sulphur content in the fuel.
A low dispersancy of the main lubricating oil has been observed during a spot test. What is the most likely cause? Select the ONE correct answer.
Ageing of the oil.
Ineffective oil filtering.
Low oil level in the sump.
Low viscosity of the oil.
An increased cylinder box temperature near one scavenge box has been observed. What are the most likely causes? Select the TWO correct answers.
Too much cylinder oil.
Dirty air cooler.
Worn piston rings.
Not enough cylinder oil.
An increased temperature of ONE main bearing has been observed. What are the TWO most likely causes? Select the TWO correct answers.
Seizure in the main bearing.
Engine overload.
High temperature of the lubricating oil.
Cylinder overload.
High contamination of the main lubricating oil has been observed during the spot test. What is the most likely cause? Select the ONE correct answer.
Ineffective oil filtering.
High sulphur content in the fuel.
Ineffective oil cooling.
Low viscosity of the oil.
The viscosity of the lubricating oil has been found to be low. Which TWO of the following could have combined to cause this? Select the TWO correct answers.
Worn nozzles of the fuel injectors.
High sulphur content in the fuel.
Worn piston rings.
Low TBN of the cylinder oil.
The Mean Indicated Pressure, MIP of ONE cylinder has an increasingly negative deviation as shown. What are the TWO most likely causes? Select the TWO correct answers.
Late combustion caused by the wrong injection timing.
Low compression pressure.
Dirty air filter.
Early combustion caused by the wrong injection timing.
The air cooler temperature difference has an increasingly negative deviation as shown. What is the most likely cause? Select the ONE correct answer.
Dirty fresh water side of the central cooler.
Dirty water side of the air cooler.
Low pressure of the fresh cooling water.
Low temperature of the fresh cooling water.
The air pressure drop at the air cooler has an increasingly positive deviation as shown. What is the most likely cause? Select the ONE correct answer.
Dirty air cooler.
Dirty air filter.
Dirty turbocharger.
Faulty stuffing box.
The air pressure drop at the air filter has an increasingly positive deviation as shown. What is the most likely cause? Select the ONE correct answer.
Dirty air cooler.
Dirty turbocharger.
Dirty air filter.
Low ambient air pressure.
The combustion pressure in ONE cylinder changes as shown on the graph. What is the most likely cause? Select the ONE correct answer.
A leaking exhaust valve.
Early combustion caused by the wrong injection timing.
Late combustion caused by the wrong injection timing.
Low scavenge air pressure.
The combustion pressure in ONE cylinder changes as shown on the graph. What is the most likely cause? Select the ONE correct answer.
A decreased quantity of the fuel injected.
A leaking exhaust valve.
Late combustion caused by the wrong injection timing.
Low scavenge air pressure.
The cooling water temperature difference at ONE cylinder has an increasingly positive deviation as shown. What are the TWO most likely causes? Select the TWO correct answers.
Crack in the cylinder head.
Crack in the turbocharger.
High temperature of the cooling water.
Crack in the cylinder liner.
The exhaust gas temperature deviation of a single cylinder shows the following trend. What are the possible causes? Select any answers that you think apply.
A leaking exhaust valve.
Early combustion caused by the wrong injection timing.
Low inlet pressure of the oil cooling the pistons.
Low scavenge air pressure.
The maximum combustion pressure of ONE cylinder has an increasingly negative deviation as shown. What is the most likely cause? Select the ONE correct answer.
Low compression pressure.
Late combustion caused by the wrong injection timing.
Dirty air filter.
Early combustion caused by the wrong injection timing.
The scavenge air pressure has an increasingly negative deviation as shown. What are the TWO most likely causes? Select the TWO correct answers.
Dirty air filter.
Dirty exhaust duct after turbocharger.
Faulty stuffing box.
Worn piston rings.
The turbocharger speed has an increasingly negative deviation as shown. What are the TWO most likely causes? Select the TWO correct answers.
Corroded turbocharger nozzle ring.
Too large a clearance between the turbine blades and the shroud.
Dirty exhaust duct after turbocharger.
Dirty turbocharger.
The turbocharger speed has an increasingly positive deviation as shown. What are the TWO most likely causes? Select the TWO correct answers.
A dirty air filter or air cooler.
Corroded turbocharger nozzle ring.
Dirty turbocharger.
Too large a clearance between the turbine blades and the shroud.
The water content in the lubricating oil has been found to be high. What are the TWO most likely causes? Select the TWO correct answers.
Crack in the cylinder liner.
Faulty operation of the lubricating oil separator.
High water level in the compensation tank.
Low level of the lubricating oil in the sump.
There is dark smoke coming from the funnel. What are the possible causes? Select any answers that you think are correct.
Fault in the turbocharging system.
Fault in the fresh water cooling system.
Low viscosity of the lubricating oil.
Engine overload.
What are the possible causes of an increasing positive deviation of the average exhaust temperature? Select any answers that you think apply.
Low inlet pressure of the cylinder cooling water.
Low inlet pressure of the oil cooling the pistons.
Not enough combustion air.
Low inlet temperature of the oil cooling the pistons.
Which THREE of the following are typical symptoms of problems with combustion in the engine? Select the THREE best answers.
Increasing deviation of the exhaust gas temperature after a single cylinder.
Increasing negative deviation of the maximum combustion pressure in a single cylinder.
Increasing positive deviation of the average exhaust gas temperature.
Increasing negative deviation of the scavenge air pressure.
Which TWO of these parameters are most commonly used for the evaluation of diesel engine combustion? Select the TWO best answers.
Exhaust temperature after each cylinder.
Maximum pressure in each cylinder.
Scavenge air pressure.
Turbocharger rpm.
Which TWO of these parameters are most commonly used for the evaluation of engine lubrication? Select the TWO best answers.
Main bearing temperatures.
Cylinder head temperatures.
Water content in the lubrication oil.
Mean Indicated Pressure in each cylinder.
Which TWO of these parameters are most commonly used for the evaluation of engine performance? Select the TWO best answers.
Load index.
Ship speed.
Turbocharger rpm.
Engine rpm.
Which TWO of these parameters are most commonly used for the evaluation of turbocharging? Select the TWO best answers.
Scavenge air pressure.
Turbocharger rpm.
Exhaust temperature after each cylinder.
Maximum pressure in each cylinder.
Which TWO of these statements about diesel engine diagnostic parameters are true? Select the TWO correct answers.
Their value does not depend on the engine technical state.
They help to optimize the maintenance process.
They help to avoid the most serious engine faults.
They can only be measured with a special electronic equipment.
Which engine parameter should be used as an independent variable when creating a model diagram for turbocharger speed? Select the ONE best answer.
Scavenge air pressure.
Engine power.
Engine rpm.
Exhaust gas temperature before the turbocharger.
Which of these factors might affect the measured parameters of a diesel engine? Select any answers that you think are correct.
Fuel quality.
Technical state of the engine.
The draught of the ship.
Weather conditions.
Which parameter should be used as the independent variable when creating the model diagram for cooling water temperature difference at cylinder? Select the ONE best answer.
Cooling water inlet temperature.
Engine power.
Engine rpm.
Exhaust gas temperature after cylinder.
Why is the first step in engine diagnosis usually to use a model diagram, followed by plotting the deviation on a time-based deviation chart? Select the TWO best answers.
Because measurements need to be compared to their values at a similar load by using a model diagram.
Because there may be some short term effects like weather, or tide, so we need to look at the trend of deviations over a long enough time period.
Because individual measurements are inaccurate.
Because over time, the performance cannot be expected to be anything like it was when the ship was new.
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