Welcome to the website where you can pass online the CES CBT CD-7024 test on the subject «TOTS 1B-Electrical, Electronic and Operations». 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 «TOTS 1B-Electrical, Electronic and Operations». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«TOTS 1B-Electrical, Electronic and Operations» subject includes theoretical and practical information about advanced training for work on any type of vessel. The course delivers in-depth knowledge of electrical and electronic systems found aboard various types of vessels. The training within the curriculum allows participants to gain hands-on experience with troubleshooting, maintaining and operating electrical equipment. The subject covers a wide range of topics, including power generation and distribution, control circuits, automation systems and communication networks on ships. Sailors learn to interpret electrical schematics, diagnose faults in electronic components and perform necessary repairs safely and effectively. A key focus is placed on understanding the operational principles of electronic navigation aids, monitoring systems and emergency equipment used on modern vessels. The course emphasizes the integration of electrical and electronic systems within the overall operation of the vessel, ensuring a holistic understanding. Trainees are educated on relevant safety regulations and industry best practices concerning electrical and electronic work in a maritime environment. Successful completion of the test equips seamen with the advanced skills required to manage and maintain complex electrical and electronic systems on any type of vessel.
On this site Crew Evaluation System Test on the subject «TOTS 1B-Electrical, Electronic and Operations» contains 56 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 pump motor is found to be running at abnormally high temperatures. Which of the following would be the most likely cause of this condition?
A loose terminal connection.
A fouled or damaged impeller.
Low winding insulation.
The thermal overload is set too low.
A three phase DOL (Direct on line) motor is rotating in the wrong direction. How can this be corrected?
Interchange two of the three phases at the motor OR starter.
Fit a reversing contactor.
Install a larger cable.
Stop and restart the motor.
An insulation resistance (megger) test on a motor located on the open deck of a vessel provides an apparent low reading (1MΩ). Which course of action should be taken?
Check the running current of the motor under full load conditions.
Check the maintenance history to identify any deterioration in insulation properties since previous tests.
Immediately remove the motor from service.
Replace the motor with a spare.
Despite its vessel safety function, which of the following shutdowns must be fitted on emergency generator engines?
High cooling water temperature.
High oil mist concentration.
Low lub oil pressure.
Over speed.
For Direct on Line (DOL) Starting, what would you expect the starting current to be?
6 – 10 × normal current.
0,5 – 1 × normal current.
10 – 20 × normal current.
2 – 3 × normal current.
For Star-Delta Starting, what would you expect the starting current to be?
0,5 – 1 × normal current.
2 – 3 × normal current.
6 – 10 × normal current.
10 – 20 × normal current.
Governor droop is required for the prime mover of a synchronous generator in order to …
Ensure stable kW load sharing.
Ensure stable kVAR load sharing.
Maintain constant frequency.
Maintain constant voltage.
How is it possible to ensure that various alarms and cut outs are working?
The Alarm Panel would indicate an error if not operating correctly.
By a regular simulation test to confirm their function.
They are checked during the daily rounds of the Duty Officer.
They are tested and certified during dry docking.
How many methods of starting are required for an emergency generator?
One method.
Two methods.
Three methods.
Four methods.
How often would you expect the operation of standby equipment to be checked? How would you do this?
Daily, by switching over to alternate standby machinery.
Monthly, by switching over to alternate standby machinery.
Weekly, by switching over to alternate standby machinery.
Quarterly, by switching over to alternate standby machinery.
How often would you routinely take insulation resistances (Megger) readings on electrical equipment?
Every 3 months.
Every 2 weeks.
Monthly.
Weekly.
How should you check to see if an item of electrical equipment is overloaded?
By conducting Megger tests to confirm that the insulation value is satisfactory.
Monitor the heat generated, and also vibration and noise levels.
Overload trips are fitted so that, if the equipment does not trip, then it is operating correctly.
By checking the ammeter to ensure it is not drawing excess current.
How would you determine the value of a resistor?
By its shape.
By its size.
By colour coding bands.
By the colour of the resistor.
How would you ensure that all Electrical equipment has a satisfactory insulation value?
By ensuring the equipment is dry and free from moisture.
By operating and observing the operational performance and running amperage.
By regular megger testing.
By routine maintenance.
If a circuit breaker is fitted with a shunt release, the circuit breaker will trip …
When voltage is applied to the shunt release.
When the voltage is removed.
When there is a faulty contact.
When there is a wire break in the control circuit.
If you suspected that an electric motor had burnt out what would you check to confirm your diagnosis?
You would check the main switch board for earth fault indications.
You would check the motor casing for discolouration or the smell of smoke.
You would check motor insulation, the terminals and the starter box for any single phasing.
You would check the shaft and bearings for wear.
In a battery system, the most effective method of determining a cell’s capacity to maintain its charge is by measuring the cell voltage …
Under fully loaded condition.
When off load.
When removed from the circuit.
While on boost charge.
In addition to maintaining the output voltage of a generator at a pre-set level, what is the function of the Automatic Voltage Regulator (AVR)?
To ensure equal loading of kVAR between generators operating in parallel.
To control the system power factor.
To ensure equal loading of kW between generators operating in parallel.
To ensure that generators operating in parallel always run at matching speeds.
In preparing for maintenance on any critical equipment what should be considered first?
Are the spare parts onboard that are required for the work?
Is permission from the port authorities required?
Is there sufficient man power to complete the job?
Has a risk assessment been prepared?
In which compartments would you expect to find intrinsically safe electrical apparatus?
The engine control room.
The battery compartment.
The engine room.
The wheel-house.
On loss of main electrical power, how should the emergency generator start?
By pressing the local start button.
By pressing the remote start button.
Manually.
Automatically.
On starting a ship’s auxiliary generator, the voltage does not rise to the required level while the correct system frequency is steady. What is the most probable cause of this fault condition?
Excitation failure.
Governor failure.
Low insulation.
Reverse power.
The emergency generator automatic starting system must be capable of a minimum of …
Three starts.
Five starts.
One start.
Ten starts.
The main reason for using an insulated neutral supply system is to …
Prevent tripping of essential circuits when an earth fault occurs.
Avoid the need for earth fault detection equipment.
Give automatic tripping of faulty circuits.
Prevent system over voltages.
The power supply at a ship’s main switchboard has an unsteady frequency. What is the most likely cause of this condition?
Alternator winding over-temperature.
A faulty generating engine governor.
An Automatic Voltage Regulator fault.
The loss of excitation.
The starting of a large induction motor may result in high surge currents that can cause …
A voltage dip on the supply.
A long run up time.
An increase in supply frequency.
Starting of the standby generator.
To enable two or more generators to be connected to a common busbar, which of the following electrical parameters must be matched?
The current.
The power.
The voltage and frequency.
The reactive power.
What action should you take if the insulation on the earth meter shows low readings?
Isolate each piece of equipment in turn to identify which one has low insulation.
Megger test all related equipment to identify the one which has low insulation.
Observe the operation of all equipment for abnormalities.
Switch all the equipment on, then turn off one by one to identify which has low insulation.
What condition would result in the operation of a generator’s Reverse Power Relay?
When the generator engine is running at low speed.
When the generator engine is running at high speed.
When the generator is in overload condition.
When there is a high temperature of the alternator windings.
What does a PT100 Sensor measure?
Level.
Pressure.
Temperature.
Voltage.
What does the abbreviation UPS stand for?
Uninterruptible Power Supply.
Under-voltage Pre Set.
Universal Power Supply.
Unprotected Power System.
What element of electrical power is credited with being responsible for damaging the human body?
Amps.
Frequency.
Volts.
Watts.
What is the correct initial action that should be carried out prior to the inspection of a ship’s auxiliary generator?
Isolate/Lock off the generator circuit breaker at the main switchboard and display isolation notices.
Prove the generator terminals are dead and earth/short circuit using approved equipment.
Obtain a Permit-to-Work.
Remove the alternator covers.
What is the fail safe condition for digital input switches connected to a ship’s central alarm and monitoring system?
It can be open or closed depending on the application.
It does not matter.
It is normally closed.
It is normally open.
What is the most appropriate method of simulating a particular temperature output from a PT100 probe?
Connect a known resistance to the sensor cabling.
Apply a 4-20 mA signal to the sensor cabling.
Apply a mV signal to the sensor cabling.
Short circuit the sensor cabling.
What is the most important aspect of portable or fixed electrical equipment in a hazardous area?
The equipment is class approved.
The equipment should be intrinsically safe.
The equipment is safely secured to prevent damage.
The equipment should be correctly earthed.
What is the purpose of a preferential trip?
It is the process of shutting down machinery when entering dry dock, prior to switching to shore power.
When a generator is overloaded, the preferential trip automatically starts the standby alternator/engine to share the load/demand, and prevent damage and blackout.
When two generators/alternators are operating and the load does not dictate the requirement for 2 alternators, one will automatically stop.
When a generator goes into a predetermined overload condition, certain non-essential power is tripped to reduce load and prevent tripping of the generator main breaker.
What is the purpose of a reverse power trip?
If a motor’s electrical terminals are incorrectly connected, it trips the motor breaker and activates an alarm.
In an emergency, it senses a dropping load demand and trips an alarm.
It trips the main breaker of a generator that is losing power, to prevent it being driven by another generator(s) on the same bus bar.
It trips the main breaker of a generator to prevent it driving another generator.
What is the purpose of a shaft earthing device?
To ensure that there is no voltage differential between the shafting, propeller and the hull.
It is associated with the operation of the vessel’s cathodic protection system.
It prevents static electricity within the crankcase of the main engine and therefore reduces the possibility of a crankcase explosion.
To provide one single point for all earths to be dissipated into the stern of the vessel.
What should the maximum setting of the thermal overload of a three phase induction motor be, in relation to the full load current rating?
A set percentage below the full load current.
A set percentage above the full load current.
At the full load current.
Twice the full load current.
What system is the most important in order to prevent the collapse of a computerised control system in the event of a power failure?
The UPS system must be maintained in good order.
Back up of files/documents must be completed.
There should be an annual service and health check of the computer systems. This should be carried out by the manufacturer’s technician.
Up-to-date anti virus software must be installed.
What type of protective device would normally be installed at a vessel’s main switchboard to serve the incoming cables from a 1.2 MW generator?
A Miniature Circuit Breaker.
An Air Circuit Breaker.
An Isolator.
FUSES.
What would happen in a Star/Delta Starter if the Star and Delta contactors were closed at the same time?
An overload would occur.
A short circuit would occur.
The motor would rotate in the wrong direction.
The motor would run at 50 % normal speed.
When an earth fault occurs on an insulated neutral system, it must be located and cleared because …
The faulty circuit is not working correctly.
The system frequency is low.
A second earth fault causes tripping.
The system voltage is low.
When checking that the casing of a motor starter is adequately earthed, which resistance value would indicate a good earth connection?
Almost zero.
1 MΩ.
Greater than 100 Ω.
Greater than 200 MΩ.
When checking the insulation resistance between a motor winding and earth, which value would indicate a motor in good condition?
Greater than 200 MΩ.
1 MΩ.
100 Ω.
Zero.
When using an extension cable reel, which of the following statements is correct?
Leave as much as possible coiled up on the reel.
Do not exceed the reeled or unreeled rating.
Only uncoil what you need.
Uncoil it fully every time.
Where might you expect to find static electricity on a tanker?
In an electrical charge produced during tank cleaning operations.
In an alternator, as a differential electrical voltage between two generators during synchronisation.
In any motor, as it is the electricity that remains as a charge within a motor when it has stopped running.
In the battery compartment when they are being charged.
Which instrument would be used to determine if an earth fault exists on a three phase 440V heating element?
A voltmeter.
An ammeter.
A megger.
An ohmmeter.
Which of the following equipment should not be tested using a Megger insulation tester?
A heater element.
A supply cable to a hydraulic pump.
A fire detection system.
Electric motor windings.
Which of the following should be entered into a vessel’s maintenance system following work carried out on an electric motor? (1) Whether work scheduled or unplanned. (2) Details of the work done. (3) Details of parts used while carrying out the work.
(1), (2) and (3).
(1) and (2).
(1) and (3).
(2) and (3).
Which of the following would provide the most reliable assessment of the insulation resistance of a motor winding?
A megger tester.
A digital multimeter on resistance setting.
An analogue AVO meter on resistance setting.
Earth lamps/monitoring unit on the main switchboard.
Which test instrument could be used to test the condition of a diode?
A megger.
An ohmmeter.
A voltmeter.
An ammeter.
Which test instrument would be used to determine the running current of a three phase motor?
An ammeter.
A megger.
A voltmeter.
An ohmmeter.
Why should equipment be earthed?
To discharge electrical current to earth in the event of a short circuit.
To enhance machinery performance and extend the life cycle of equipment.
To prevent an earth alarm indication on the main switch board.
To prevent damage to the vessels computer systems.
You are about to megger test a 440 V motor. What is the minimum test voltage to be used?
110 Volts.
220 Volts.
400 Volts.
500 Volts.
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