Welcome to the website where you can pass online the Computer Based Test (CBT) also known as Crew Evaluation System (CES) on the subject «Basic Hydraulic System». Practice like this will help you as a marine specialist improve your knowledge with the help of online studying and appraisal practice. CES/CBT based on practical information and marine specialists experience.
CES & CBT 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 «Basic Hydraulic System». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«Basic Hydraulic System» subject includes theoretical and practical information about basics of the hydraulic system. Knowledge of this information directly shows employee’s competence who holds a relevant post on a vessel, provides to know the basics of hydraulic systems used on ships, be able to control pressure, understanding common reasons for failures in order to avoid them.
On this site Crew Evaluation System Test on the subject «Basic Hydraulic System» contains 16 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.
Choose mode in which you want take CES test about Basic Hydraulic:
Start test
By reducing the flow, the torque will:
Be reduced.
Be the same.
Be higher.
Next question
Counterbalance valve is used:
To support a load and prevent “creeping”.
To unload the delivery pump.
It is the same as a check valve.
Next question
Energy not used to move the load in a hydraulic system turns into what?
Pressure.
Heat.
Noise.
Next question
How much pressure will a force of 2 000 N create in a cylinder with a piston area of 0,0025 m2?
400 kPa.
800 kPa.
1 600 kPa.
Next question
Internal leaks create:
Faster movement of the actuator.
Higher pressure in the system.
Heat.
Next question
Is hydraulic oil compressible?
No.
Aprox. 1/2 % pr. 7 MPa.
10 % pr. 5 MPA.
Next question
Movement of the actuator depends on:
Pressure.
Flow.
Next question
Pascal’s law says:
Force = pressure * area.
Force = pressure / area.
Force = pressure + area.
Next question
Rate of flow determines:
Torque.
Speed.
Pressure.
Next question
What creates pressure in a hydraulic system?
The directional valve.
The resistance to flow.
The pump.
Next question
What is the most common reason for failures in hydraulic systems?
The use of the wrong type of oil.
Water in the oil.
Contamination of the oil.
Next question
What type of gas should be used to charge an accumulator?
Compressed air.
Nitrogen.
Oxygen.
Next question
When do we use a pilot operated check valve?
To reduce load.
To prevent overload.
To prevent creeping.
Next question
Which statement is not true?
Hydraulics has a simple design, few parts and is easy to operate.
Hydraulics cannot be used in hazardous condition.
Hydraulics produce constant torque with variable speed.
Next question
Which statement is true?
Hydraulic components need external lubrication.
Difficult to control speed of actuator.
Hydraulic components have a high power to weight ratio.
Next question
Which type of pump is most common in hydraulic systems?
Positive displacement pump.
Non-positive displacement pump.
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* In some questions may be more, than one right answer.
“CES test” finished! Your result:
