Welcome to the website where you can pass online the CES CBT CD-0485 test on the subject «Four-Stroke Diesel Engines». 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 «Four-Stroke Diesel Engines». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«Four-Stroke Diesel Engines» subject includes theoretical and practical information about advanced training for work on any type of vessel. This test provides in-depth knowledge of four-stroke diesel engine operation, encompassing both fundamental principles and advanced troubleshooting techniques. Participants will gain hands-on experience with various diagnostic tools and maintenance procedures specific to marine diesel engines. The curriculum integrates theoretical understanding preparing trainees for real-world scenarios encountered aboard vessels.Advanced topics covered include fuel injection systems, turbocharging, engine performance optimization and emission control technologies. Upon completion, participants will possess the skills and knowledge necessary to safely and efficiently maintain and repair four-stroke diesel engines on a wide range of vessels.
On this site Crew Evaluation System Test on the subject «Four-Stroke Diesel Engines» contains 38 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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Exam
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* Some questions may have more than 1 correct answer.
According to this module, what is correct the temperature for the air when it enters the cylinder? Select the ONE correct answer.
Between 10 °C and 20 °C.
Between 40 °C and 60 °C.
Between 60 °C and 80 °C.
Between 80 °C and 90 °C.
According to this module, what is the typical efficiency of a modern four stroke marine diesel engine? Select the ONE correct answer.
About 40 %.
About 50 %.
About 80 %.
About 90 %.
For the type of engine described in this module, what is a typical fuel injector opening pressure? Select the ONE correct answer.
Between 50 and 100 bar.
Between 100 and 180 bar.
Between 200 and 300 bar.
Between 300 and 400 bar.
For the type of engine described in this module, what is the maximum fuel pump pressure during fuel injection? Select the ONE correct answer.
Between 500 and 1 500 bar.
Between 100 and 200 bar.
Between 5 and 15 bar.
Between 50 and 100 bar.
For the type of engine described in this module, what is the maximum pressure during the power stroke? Select the ONE correct answer.
180 to 220 bar.
100 to 150 bar.
6 to 10 bar.
60 to 100 bar.
For the type of engine described in this module, what is the maximum temperature in the combustion space? Select the ONE correct answer.
Between 1 000 °C and 1 200 °C.
Between 1 200 °C and 1 400 °C.
Between 500 °C and 900 °C.
Between 1 500 °C and 2 000 °C.
For the type of engine described in this module, what is the pressure of the air at the end of the compression stroke? Select the ONE correct answer.
70 to 100 bar.
10 to 30 bar.
150 to 250 bar.
30 to 50 bar.
For the type of engine described in this module, what is the temperature of the air at the end of the compression stroke? Select the ONE correct answer.
Between 400 °C and 600 °C.
Between 100 °C and 200 °C.
Between 200 °C and 300 °C.
Between 600 °C and 800 °C.
For the type of engine described in this module, which two engine parts are connected by the connecting rod? Select the ONE correct answer.
The crankshaft and the camshaft.
The cylinder head and the cylinder block.
The crankshaft and the piston.
The cylinder head and the cylinder cover.
How is the quantity of fuel injected controlled? Select the ONE correct answer.
By changing the length of the push rod.
By turning the barrel.
By turning the cam.
By turning the plunger.
In practice, how many kilograms of air are needed in order to burn 1 kg of a typical liquid marine fuel? Select the ONE correct answer.
30 to 45 kg of air for 1 kg of fuel.
1 kg of air for 1 kg of fuel.
10 to 20 kg of air for 1 kg of fuel.
5 to 10 kg of air for 1 kg of fuel.
THEORETICALLY, how many kilograms of the air are needed in order to burn 1 kg of a typical liquid marine fuel? Select the ONE correct answer.
15 kg of air for 1 kg of fuel.
1 kg of air for 1 kg of fuel.
10 kg of air for 1 kg of fuel.
20 kg of air for 1 kg of fuel.
To provide a good scavenging process, what should the scavenge air pressure be? Select the ONE correct answer.
Equal to the pressure in the cylinder.
Higher than the pressure in the cylinder when the inlet valves open.
Higher than the compression pressure.
Lower than the pressure in the cylinder when the inlet valves open.
What are the start and end points for the compression stroke? Select the ONE correct answer.
From one Bottom Dead Centre to the next Bottom Dead Centre.
From one Top Dead Centre to the next Bottom Dead Centre.
From one Top Dead Centre to the next Top Dead Centre.
From one Bottom Dead Centre to the next Top Dead Centre.
What are the start and end points for the exhaust stroke? Select the ONE correct answer.
From one Bottom Dead Centre to the next Bottom Dead Centre.
From one Bottom Dead Centre to the next Top Dead Centre.
From one Top Dead Centre to the next Bottom Dead Centre.
From one Top Dead Centre to the next Top Dead Centre.
What are the start and end points for the intake stroke? Select the ONE correct answer.
From one Top Dead Centre to the next Bottom Dead Centre.
From one Bottom Dead Centre to the next Bottom Dead Centre.
From one Bottom Dead Centre to the next Top Dead Centre.
From one Top Dead Centre to the next Top Dead Centre.
What are the start and end points for the power stroke? Select the ONE correct answer.
From one Top Dead Centre to the next Bottom Dead Centre.
From one Bottom Dead Centre to the next Bottom Dead Centre.
From one Bottom Dead Centre to the next Top Dead Centre.
From one Top Dead Centre to the next Top Dead Centre.
What is the first place that the air from the air cooler goes to? Select the ONE correct answer.
The crankcase.
The inlet valves.
The turbocharger air side.
The charge air receiver.
What is the fuel delivery pressure before the fuel pump plungers starts to move up? Select the ONE correct answer.
Between 2,5 and 10 bar.
Between 1 and 2 bar.
Between 100 and 200 bar.
Between 20 and 100 bar.
What is the main reason for cooling the air after the turbocharger?
To decrease the fuel quantity.
To increase the density of the air.
To prevent early ignition of the fuel.
To recover waste heat.
What is the name of the engine part which the piston has direct contact with?
The liner.
The crankshaft.
The cylinder block.
The cylinder head.
What is the name of the fuel injection pump part which transfers the cam movement to the pump plunger?
The barrel.
The pushrod.
The fuel rack.
The spring.
What is the name of the fuel injection pump part which transfers the cam movement to the pump push rod?
The roller.
The fuel rack.
The plunger.
The spring.
What is the typical maximum speed of a four stroke high speed diesel engine?
2 000 to 4 000 rpm.
200 to 400 rpm.
400 to 2 000 rpm.
80 to 200 rpm.
What is the typical maximum speed of a four stroke medium speed diesel engine?
400 to 4 000 rpm.
200 to 400 rpm.
60 to 80 rpm.
80 to 200 rpm.
What is the typical pressure of the scavenge air entering the cylinder?
Between 2 and 5 bar.
Between 0,2 and 0,5 bar.
Between 10 and 15 bar.
Between 5 and 10 bar.
What is the typical residual pressure in the fuel injection pipe after injection has finished?
Between 10 and 20 bar.
Between 50 and 70 bar.
Between 100 and 200 bar.
Zero.
What is the typical temperature of the exhaust gases at the end of the power stroke?
Between 500 °C and 700 °C.
Between 100 °C and 200 °C.
Between 200 °C and 300 °C.
Between 300 °C and 500 °C.
When does the exhaust process start?
Shortly before Bottom Dead Centre.
Shortly after Bottom Dead Centre.
Shortly after Top Dead Centre.
Shortly before Top Dead Centre.
When does the fuel injection process start?
Just before Top Dead Centre.
At mid-stroke.
Just after Top Dead Centre.
Just before Bottom Dead Centre.
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