Welcome to the website where you can find answers for the Computer Based Test (CBT) also known as Crew Evaluation System (CES) on the subject «Engine Oil Viscosity (Automation)». This site will help you as a marine specialist improve your knowledge with the help of open information, where you can find questions as well as answers for them. 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 «Engine Oil Viscosity (Automation)». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«Engine Oil Viscosity (Automation)» subject includes theoretical and practical information about oil viscosity used in engines. Knowledge of this information directly shows employee’s competence who holds a relevant post on a vessel, provides to have understanding on what oil viscosity does affect and what it depends on, what problems high oil viscosity can cause and how to avoid it.
This page contains answers to Seagull CES CBT (Crew Evaluation System/Computer Based Test) test about Engine Oil Viscosity (Automation), and serve as a database of questions and answers, using which seafarer can prepare to exams for getting certificate of competence, or just to challenge yourself with knowledge in this theme.
CBT CD 0083 – Automation.pdf
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Use the search below to find question.
Amount of questions: 13.
Right answers marked with this sign .
Can too high viscosity cause damages to the fuel injection system?
It can only affect the atomisation.
It cannot cause any damages.
It can damage parts of the fuel pump and their drive, it can cause the relief valves to spray off, and it can affect the atomisation of the fuel.
If an input value of a temperature controller connected to a heater is above the set point, this will result in:
A reduction of the output signal.
An increase of the output signal.
A stabilization of the output signal above the proportional band.
A narrowing of the proportional band.
Select the components that are in your opinion the main components in a steam viscosity system:
Measuring tube built into fuel line, and provided with a thermometer and manometer.
Flow rate regulator.
Differential pressure converter.
Controller (proportional, proportional + integral or proportional + integral + differential).
Steam regulating valve.
Viscosensor.
What are the highest viscosity modern diesel engines are capable of burning?
Approximately 1 200 cSt, at 50 °C.
Approximately 700 cSt, at 50 °C.
Approximately 500 cSt, at 50 °C.
Approximately 1 000 cSt, at 50 °C.
What determines the oil’s viscosity?
The oil’s content of cat fines.
The oil’s content of sediments.
Only the temperature.
Temperature and composition.
What do we mean with a “180 grade fuel”?
Viscosity equal to or more than 180 cSt at 50 °C.
Viscosity equal to or less than 180 cSt at 70 °C.
Viscosity equal to or less than 180 cSt at 50 °C.
Viscosity equal to or more than 180 cSt at 70 °C.
What gives the best separating effect?
Low throughput (m3/hr) low viscosity.
High throughput (m3/hr) low viscosity.
Low throughput (m3/hr) high viscosity.
High throughput (m3/hr) high viscosity.
What is the most effective way of cleaning liquid fuels from solids and water?
Filter.
Centrifugal separators.
Settling tanks.
Additives.
What is the working principle of the viscosity controller based on?
The temperature of the oil.
The drop in pressure that occurs in a capillary tube.
The increase in pressure that occurs in a capillary tube.
The oil’s speed through a capillary tube.
What makes a Proportional-Integral-Derivative (PID) control different from a PI control?
The proportional band is narrower.
The control switches before the signal overshoots the set point value.
A “derivative” action increases the reaction time of the control system.
There is no difference between a PID and a PI.
What type of unit is used when referring to “dynamic” viscosity?
Centipoise.
Milliparsel-seconds.
Centiparsecs.
Zahn.
Which statement is true?
The proportional feedback control can reduce error response to disturbances but that it still allows a non-zero steady-state error.
The proportional feedback control can reduce error response to disturbances, and keep it to a steady correct value.
The proportional feedback control cannot reduce any errors.
The proportional feedback is the cause of error response.
With the described viscosity sensor, the differential pressure is transferred to:
A magnetic coupling between viscosity sensor motor and gear pump.
A thermometer.
A resilient stainless steel housing and a stainless steel damping capillary.
An indicator and the viscosity controller.
Test about Engine Oil
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