Welcome to the website where you can pass online the CES CBT CD-0483 test on the subject «Introduction to Two-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 «Introduction to Two-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.
«Introduction to Two-Stroke Diesel Engines» subject includes theoretical and practical information about advanced training for work on any type of vessel. The test provides comprehensive training on the principles and operation of these powerful engines. This subject covers concepts and applications relevant to marine engineering. Sailors will learn about the unique combustion cycle, scavenging methods and lubrication systems specific to two-stroke diesels. Understanding these engines is crucial for marine engineers working on various types of vessels from cargo ships to cruise liners. The training emphasizes maintenance procedures, troubleshooting techniques and safety protocols essential for operating these complex machines. This knowledge ensures safe and efficient vessel operation, minimizing downtime and maximizing performance. The subject aims to equip participants with the skills needed for advanced work on any vessel utilizing two-stroke diesel propulsion. By mastering the intricacies of these engines, marine professionals enhance their career prospects within the maritime industry.
On this site Crew Evaluation System Test on the subject «Introduction to Two-Stroke Diesel Engines» contains 30 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.
According to this module, what is the correct 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 two 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 5 and 15 bar.
Between 50 and 100 bar.
Between 100 and 200 bar.
Between 500 and 1 500 bar.
For the type of engine described in this module, what is the maximum pressure during the power stroke? Select the ONE correct answer.
6 to 10 bar.
60 to 100 bar.
100 to 140 bar.
180 to 220 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 1 500 °C and 2 000 °C.
Between 1 000 °C and 1 200 °C.
Between 1 200 °C and 1 400 °C.
Between 500 °C and 900 °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.
3 to 5 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 100 °C and 200 °C.
Between 200 °C and 300 °C.
Between 400 °C and 600 °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 crosshead.
The crankshaft and the piston.
The entablature and the A-frames.
The piston and the crosshead.
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 plunger.
By turning the cam.
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 air are needed in order to burn 1 kg of a typical liquid marine fuel? Select the ONE correct answer.
1 kg of air for 1 kg of fuel.
10 kg of air for 1 kg of fuel.
15 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.
Higher than the pressure in the cylinder when the inlet ports are uncovered.
Equal to the pressure in the cylinder.
Higher than the compression pressure.
Lower than the pressure in the cylinder when the inlet ports are uncovered.
What are the start and end points for the intake and compression stroke? Select the ONE correct answer.
From one Bottom Dead Centre to the next Bottom Dead Centre.
From Bottom Dead Centre to the next Top Dead Centre.
From one Top Dead Centre to the next Top Dead Centre.
From Top Dead Centre to the next Bottom Dead Centre.
What are the start and end points for the power and exhaust stroke? Select the ONE correct answer.
From Top Dead Centre to the next Bottom Dead Centre.
From Bottom Dead Centre to the next Top Dead Centre.
From one Bottom Dead Centre to the next Bottom 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 scavenge air receiver.
The cylinder liner inlet ports.
The turbocharger air side.
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 purpose of the stuffing box? Select the ONE correct answer.
To form a seal around the connecting rod.
To keep the piston rod central.
To prevent exhaust gas from leaking into the crankcase.
To prevent leakage of scavenge air into the crankcase.
What is the main reason for cooling the air after the turbocharger? Select the ONE correct answer.
To increase the density of the air.
To decrease the fuel quantity.
To prevent early ignition of the fuel.
To recover waste heat.
What is the name of the engine part which directly supports the cylinder blocks? Select the ONE correct answer.
The bedplate.
The cylinder heads.
The A-frames.
The liners.
What is the name of the engine part which the piston has direct contact with? Select the ONE correct answer.
The crankshaft.
The cylinder block.
The cylinder head.
The liner.
What is the name of the fuel injection pump part which transfers the cam movement to the pump plunger? Select the ONE correct answer.
The push rod.
The barrel.
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? Select the ONE correct answer.
The fuel rack.
The plunger.
The spring.
The roller.
What is the purpose of the auxiliary blower? Select the ONE correct answer.
To provide scavenge air to the engine at start up and low loads.
To maintain a positive pressure in the crankcase.
To provide air to auxiliary equipment.
To provide more air at high engine powers.
What is the typical maximum speed of a two stroke diesel engine? Select the ONE correct answer.
60 to 80 rpm.
80 to 200 rpm.
200 to 400 rpm.
400 to 1000 rpm.
What is the typical pressure of the scavenge air entering the cylinder? Select the ONE correct answer.
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? Select the ONE correct answer.
Between 50 and 70 bar.
Between 10 and 20 bar.
Between 100 and 200 bar.
Zero.
What is the typical temperature of the exhaust gases at the end of the power stroke? Select the ONE correct answer.
Between 100 °C and 200 °C.
Between 200 °C and 300 °C.
Between 300 °C and 500 °C.
Between 500 °C and 700 °C.
When does the exhaust process start? Select the ONE correct answer.
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? Select the ONE correct answer.
Just before Top Dead Centre.
At mid-stroke.
Just after Top Dead Centre.
Just before Bottom Dead Centre.
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