Test Online for Seamans about Engine, Management Level (CES v6.0)
Test results
The test consisted of 80 random questions.
Total questions on this topic: 118
Total questions on this topic: 118
Your result: 64%
Right answers:
1
This figure shows a transformer, with two windings, N(1) = 2 000 and N(2) = 1 000 turns, on a common magnetic circuit. Assume that there is no energy loss in the transformer itself. Calculate the current I(2) when the current I(1) = 2 A.
Correct answer:
I(2) = 4 A.Your Answer:
I(2) = 2 A.2
A portable oxygen analyser for use onboard ship is of the paramagnetic sensing element type. It is being used to test the atmosphere of a space onboard ship but starts to give erratic readings. There is no obvious indication as to why this is happening. Select from the options given the most likely cause of this problem:
Your answer is correct:
The sampling filter is partially blocked giving rise to wide pressure variations in the sampling chamber.3
Some fuel oil and lubricating oil separators have a facility to control the back pressure of the clean oil outlet during start up and operation. What is the purpose of this control function?
Correct answer:
To help to maintain the oil/water interface at the correct position.Your Answer:
To reduce the amount of sealing water required during operation.4
A motor nameplate reads 75 hp. What is the reading in kW?
Your answer is correct:
56 kW.5
The pyrotechnics used to transmit visual signals to other vessels, boats or aircrafts are of the following type:
Your answer is correct:
All of the below mentioned.6
Which one of the listed requirements regarding abandon ship drills corresponds to present SOLAS regulation?
Correct answer:
Each lifeboat shall be launched, and maneuvered in the water with its assigned crew at least once every three months during an abandon ship drill.Your Answer:
Drills shall be conducted when the ship is in a harbour.7
What type of dynamic forces may cause indent in plating on forecastle deck and main deck in way of pillars inside forecastle?
Your answer is correct:
Pressure forces caused by green water on deck.8
An indicator card from a cylinder of a slow speed diesel engine shows a high maximum pressure occurring earlier in the cycle than normal with a normal compression pressure. From the options given, which action is most likely to identify the cause of the problem?
Your answer is correct:
Check if the fuel injection pump timing is correct.9
How is a Safety Management Certificate obtained?
Your answer is correct:
Ship owner has Document of Compliance issued, and vessel is assessed and holds all statutory certificates.10
A transformer rated at 22 kVA, 440/220 Volts, 60 Hz, is used to step down the voltage to a lighting system. The low tension voltage is to be kept constant at 220 Volts. What load impedance connected to the low-tension side will cause the transformer to be fully loaded?
Your answer is correct:
2,2 Ohms.11
The cold room temperature is almost at the cut out point in a vapour-compression refrigeration system. What should the refrigerant state be just after the evaporator if the system is correctly set up?
Correct answer:
Slightly superheated low pressure gas.Your Answer:
Cold liquid at high pressure.12
What kind of electrolyte is used for Nickel-iron batteries?
Your answer is correct:
Solution of potassium hydroxide (KOH) and water.13
A 6-Volt DC relay is to be used with a 12-Volt power supply. The relay requires a current of 0,1 Amp. What is the series resistance required?
Your answer is correct:
60 Ohm.14
The main propulsion diesel engine is normally started by direct admission of compressed air. Which one of the following statements is correct?
Your answer is correct:
A heavily leaking starting air valve may cause an explosion in the starting air pipe system.15
After a couple of hours of operation the failure alarm sounds for a heavier fuel oil purifier which is operating on a timed automatic sludge cycle. Upon investigation the purifier is found to be running slowly and when opened up the casing and sludge outlet is heavily fouled with sludge in contact with the bowl. From the options given what is the most likely cause of this problem?
Correct answer:
The heavy fuel is unstable leading to excessive high viscosity sludge formation.Your Answer:
The purifier bowl has not closed properly.16
A galley hot plate uses a Nichrome/Magnesium Oxide heating element, and is to be tested before being put into service for the first time. An insulation resistance test yields a reading of 0,3 M Ohm. Which action should be taken?
Correct answer:
Apply reduced voltage to the element for a few minutes. Then retest, and if ok put into service.Your Answer:
Wash the element in a degreaser agent. Then retest, and if ok put it into service.17
Low voltage ships tend to have insulated neutral systems. What is the reason for this?
Correct answer:
In the event of an earth fault vital equipment will not trip.Your Answer:
It’s more effective than insulating the live conductor.18
A galley hot plate uses a Nichrome/Magnesium Oxide heating element and is to be tested before being put into service for the first time. An insulation resistance test yields a reading of 0,3 M Ohm. Which action should be taken?
Correct answer:
Apply reduced voltage to the element for a few minutes. Then retest and if ok put into service.Your Answer:
Wash the element in a degreasing agent. Then retest and if ok put in into service.19
When turning a cascade control system, which of the following actions should be done first?
Correct answer:
Adjust the slave controller with the master controller in manual mode.Your Answer:
Adjust the slave controller with the master controller in auto mode.20
What should be the healthy continuity resistance of a 220 V, 2,2 kW, 10 A heating element, when checked near to it’s rated operating temperature?
Your answer is correct:
22 Ohms.21
When measuring viscosity with a restricted flow viscometer, the preferred sensing device is:
Your answer is correct:
Capillary tube.22
Why shall a duly qualified officer supervise any potential polluting operation?
Your answer is correct:
To avoid pollution.23
When selecting switchgear to work with High Voltage it is important to use an appropriate arcing medium. What is meant by arcing medium?
Your answer is correct:
The gas, liquid or vapor, which will minimize creation of an electric arc as contacts open.24
A transformer overheats while taking a shore supply. Which is the likely cause?
Your answer is correct:
Incorrect frequency.25
The fuel consumption for the main diesel engine has gradually increased over a period of a few months. All system pressures and temperatures appear normal. From the options given, choose the one which is the most likely cause of this:
Your answer is correct:
Fouling of the hull.26
The temperature control for a hot water system is very erratic with the temperature gradually rising and then suddenly falling and vice versa even though system demand is fairly constant. Which of the options given is the most likely cause of this problem?
Correct answer:
Control valve gland is over tightened.Your Answer:
Control valve actuator diaphragm is ruptured.27
What is the correct operation of the slow-turning facility fitted to some large 2-stroke main propulsion diesel engines?
Correct answer:
Slow turning should be set to operate automatically prior to engine start when engine has been stopped for 20 to 30 minutes during manoeuvring.Your Answer:
Slow turning should be carried out immediately the duty engineer gets notice of standby from the bridge.28
The operating mode of a pyrotechnic signal depends essentially on:
Your answer is correct:
Instructions or diagrams printed on its casing by the manufacturer.29
A two step controller (open/close) has failed and the only available spare controller is a P+I controller. Select, from the options given, how the P+I controller could be set up to achieve approximate two step control.
Correct answer:
Set the proportional band to maximum width and the integral action to minimum (repeats per minute).Your Answer:
Set the proportional band to minimum width and the integral action to minimum (repeats per minute).30
The turbocharger on a diesel engine is surging. Which one of the following options would be the most likely cause?
Correct answer:
Dirty scavenging air cooler on the air side.Your Answer:
Dirty rotor blades and nozzle ring.31
The main engine is running steady with an average exhaust gas temperature of approximately 350 °C. What would be a typical alarm/slow down setting for the cylinder exhaust gas temperature deviation from the average?
Your answer is correct:
+/- 50 °C.32
During maintenance work on the main engine a problem arises regarding the lifting of a main component in that the manufacturer’s instructions ado not apply to the engine as fitted and present a hazard. In which of the information/record sources given in the options, is it most important to record the information relating to this anomaly?
Your answer is correct:
ISM procedures in the ship’s safety manual.33
A transformer overheats while taking a shore supply. Which is the likely cause?
Your answer is correct:
Incorrect frequency.34
Power is available at a three-phase motor starter, but nothing happens (at starter or motor) when the start button is operated. Which of the following is a likely cause?
Your answer is correct:
Faulty contactor coil.35
The continuity resistance of a 100 m long × 25 sq. mm cable (rated at 100 A) is to be checked. Which of the following results would you anticipate?
Your answer is correct:
Between 0,1 and 1,0 Ohm.36
The coil of a 12 V, 120 mA DC relay must be connected across a 24 V supply. What action should be taken?
Your answer is correct:
Install a 100 Ohm resistor in series with the coil.37
What is the maximum current that a 15 Volt, 3 Watt Zenerdiode can handle without damage?
Correct answer:
0,2 A.Your Answer:
0,5 A.38
The fuel tank contents gauges onboard a vessel are of the air bubble and bell type. The gauges are calibrated for a different fuel type to the actual fuel in the tanks. When correcting the actual contents of the tanks from the gauge readings which of the parameters given in the options is the most important?
Your answer is correct:
Fuel viscosity.39
The circuit diagrams illustrate four different methods of wiring between a Pt 100 temperature sensor and its signal processing electronics. Which of the wiring methods gives the best measuring accuracy?
Correct answer:
Figure 1.Your Answer:
Figure 2.40
What is the best method for ensuring that the cylinder powers of a high speed diesel engine, fitted with a monoblock multi-cylinder fuel pump, are correctly balanced?
Your answer is correct:
Have the fuel pump phased and calibrated in a test workshop.41
In a distress situation, how many times or for how long should the emergency alarm signal be sounded?
Your answer is correct:
Until all crew members and passengers have reported to their respective muster stations.42
Who is responsible for ensuring that your ship’s security plan meets the requirements of the ISPS Code?
Correct answer:
Company Security Officer.Your Answer:
Ship Security Officer.43
What is the purpose of the relief valves fitted to the doors and casing of 2-stroke diesel engine crankcases?
Your answer is correct:
To relieve excess pressure in the crankcase resulting from a crankcase explosion.44
When should a crew member joining a ship for the first time be given some training and instructions in the use of the ship’s fire-fighting appliances?
Your answer is correct:
As soon as possible but not later than 2 weeks after he joins the ship.45
In tanker operations, there will be some areas and zones where flammable or explosive vapour, gas, or dust may be expected. Such areas are classified as hazardous. What is meant by hazardous area Zone 1?
Your answer is correct:
Flammable mixture is continuously present or present for long periods.46
In the context of an automated process control system, what is understood by the expression Master Controller?
Your answer is correct:
The primary controller in a cascade control system.47
Continuity testing of a delta connected three phase induction motor yields the following results; U1-V1 = 4 Ohms, V1-W1 = 4 Ohms, W1-U1 = 4 Ohms. What is the value of continuity resistance for each winding i. e. U1-U2?
Your answer is correct:
6 Ohms.48
The torsion meter for the main propeller shaft is reading high. The torque is sensed using the angle of twist principle with two clamp rings attached to the shaft at a fixed distance, with stationary proximity switches for measuring the angle of twist and also shaft speed fixed to a rigid stool. What is the most likely cause of the high reading?
Your answer is correct:
Circumferential slip of the after clamp ring in the opposite direction to shaft rotation.49
Which of the following options would be a typical differential pressure setting for a main engine slow down in the event of jacket cooling water system low flow?
Correct answer:
0,2 to 0,5 bar.Your Answer:
1 to 2 bar.50
A thermistor, which provides feedback for a thermal control system, is suspected to have failed. Assuming there is no available replacement, which of the following methods may be used to prove it has failed?
Correct answer:
Disconnect the thermocouple lead from the controller, and replace it with a mV source.Your Answer:
Connect a mA source in parallel with the thermocouple connections.51
In the circuit diagram shown the starter connects between which terminals?
Correct answer:
5 and 6.Your Answer:
1 and 2.52
When measuring level of liquids with a conductivity level indicator, measurement is performed by:
Your answer is correct:
Electrodes.53
When considering instrumentation systems, what is the meaning of the expression “dead-band”?
Your answer is correct:
The controller will not react to a process change in this range.54
The majority of conventions adopted under the auspices of IMO fall into which of the three main categories?
Your answer is correct:
Maritime Safety, Prevention of Marine pollution, Liability and compensation.55
A ship’s electrical system operates at 60 Hz, but when connected to shore supply it is supplied with 50 Hz. Which of the following would you expect?
Your answer is correct:
Electric motors will run at reduced speed, and will tend to overheat.56
The muster list shall show the duties assigned to the different members of the crew. Which of the given duties necessarily have to be included in the muster list?
Your answer is correct:
Clearing escape routes.57
When starting air is applied to a diesel engine the engine fails to turn over but is seen to oscillate back and forth. What is the most likely cause of this problem?
Correct answer:
One or more cylinder air start valves are stuck open.Your Answer:
Starting air pressure is too low.58
How does the maximum oil film pressure in a white metal journal bearing operating under full fluid film conditions compare with the pressure of the lubricating oil supply system?
Correct answer:
The pressure is greater than the pressure in the lubricating system and varies with the journal load.Your Answer:
The pressure is less than the pressure in the lubricating system and varies with the journal load.59
In case of a pollution in US waters, who shall notify the cleaning up contractor (OPA-90)?
Correct answer:
Qualified Individual.Your Answer:
The Master.60
A 250 V contactor has been fitted to a 220 V supply. Which of the following symptoms might be observed?
Your answer is correct:
Contactor chattering (vibrating).61
Sometimes an early warning of failure in High Voltage switchboards may be an unpleasant smell. If the switchboard uses gas circuit breakers, which of the following may indicate a potential problem?
Your answer is correct:
Rotten eggs.62
When starting three phase induction motors there is sometimes a need to use a star-delta starter. A star-delta starter exhibits the following characteristics while connected in a star.
Correct answer:
Reduced current and reduced torque.Your Answer:
Reduced current and increased voltage.63
What is the result of an “unusually large metacentric height”?
Correct answer:
The vessel will roll slowly or be unstable.Your Answer:
The vessel will roll violently.64
A medium speed diesel engine which is supported on a steel chocking system has had repeated problems with two of the chocks at the end of the engine on the port side becoming slack. This has led to some fretting damage to the bedplate and tank top in that area. What action should be taken to affect a cost effective permanent repair?
Your answer is correct:
Replace the damaged chocks with resin based chocks of an appropriate size.65
Continuity testing of a delta connected three phase induction motor yields the following results: U-V = 3 Ohms, V-W = 3 Ohms, W-U = 6 Ohms. Which of the following is the likely condition?
Correct answer:
Open circuit winding between W and U.Your Answer:
Partial fault between W and U.66
What should be the healthy continuity resistance of a 220 V, 2,2 kW, 10 A heating element, when checked near to it’s rated operating temperature?
Your answer is correct:
22 Ohms.67
Why is an automatic slow turning feature included in the start air system of many large 2 stroke diesel engines?
Your answer is correct:
To avoid damage during start of the engine in case water or other liquid has gathered in the cylinders during an extended stop.68
The charge air pressure supplied to a diesel engine, which is normally 2,0 bar, is reduced to 1,5 bar. What will be the likely effect on the engine operation?
Your answer is correct:
The performance of the engine will be reduced noticeably.69
What principle of measurement are viscosity controllers usually based on?
Correct answer:
Measurement of differential pressure.Your Answer:
Measurement of flow.70
Two reference points for pressure exist, absolute zero and atmospheric pressure. What are pressures measured relative to absolute zero called:
Your answer is correct:
Absolute pressure.71
A triac is used to provide temperature control of an oven. The galley complains that the oven only reaches approximately 50 % of demanded temperature. Which of the following is a likely cause?
Correct answer:
One of the main switching elements in the triac has failed.Your Answer:
The voltage supply to the oven controller is reduced by about 50 %.72
In case of pollution in US waters, do you always have to notify the National Response Center (OPA-90)?
Your answer is correct:
Yes, within thirty (30) minutes.73
Which is the preferred method for starting an air conditioning refrigeration compressor which has been shut down for a period of time?
Your answer is correct:
Start with suction valve throttled in to minimise risk of drawing liquid refrigerant into the compressor.74
Some diesel engines have alarm and slow down protection in the event of a fire in the scavenge boxes. Choose the option which would be a typical set point for giving a slow down of the engine in the event of a scavenge box fire?
Correct answer:
120 °C.Your Answer:
50 °C.75
When work must be done on High Voltage equipment, it is vital that the equipment is earthed (grounded) after isolation procedures have been carried out. Why is this?
Your answer is correct:
To ensure that no energy remains in the system, and that it cannot be recharged by external influences.76
In which of the following automated control processes will the time constant be of minor importance?
Your answer is correct:
Level control.77
What is the advantage of a transmitter with a narrow measurement range?
Your answer is correct:
Better linearity and increased accuracy.78
Which personnel must undergo familiarization training on board?
Your answer is correct:
Everyone.79
A cable has a resistance of 100 milli-ohms. It supplies a 300 A load over a distance of 100 meters. What is the voltage drop along it’s length?
Correct answer:
30 volts.Your Answer:
300 millivolts.80