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: 73%
Right answers:
1
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?
Your answer is correct:
Disconnect the thermocouple lead from the controller, and replace it with a mV source.2
A transformer overheats while taking a shore supply. Which is the likely cause?
Your answer is correct:
Incorrect frequency.3
Who is responsible for ensuring that your ship’s security plan meets the requirements of the ISPS Code?
Your answer is correct:
Company Security Officer.4
Which is the preferred method for starting an air conditioning refrigeration compressor which has been shut down for a period of time?
Correct answer:
Start with suction valve throttled in to minimise risk of drawing liquid refrigerant into the compressor.Your Answer:
Start and stop repeatedly until suction pressure and oil pressure are normal.5
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.
Your answer is correct:
Set the proportional band to maximum width and the integral action to minimum (repeats per minute).6
When performing electrical testing of a three phase motor, insulation resistance measurements may be influenced by which of the following?
Your answer is correct:
Temperature, humidity and surface contamination.7
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.8
How can a lead-acid type battery be checked to confirm if it is fully charged or not?
Your answer is correct:
Measure the relative density (specific gravity) of the electrolyte.9
In the context of an automated control system, which controller must be tuned first in a cascade control system?
Your answer is correct:
The secondary controller.10
When considering instrumentation systems, what is the meaning of the expression “dead-band”?
Correct answer:
The controller will not react to a process change in this range.Your Answer:
The controller will not respond to adjustment of set-point.11
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).12
Two reference points for pressure exist, absolute zero and atmospheric pressure. What are pressures measured relative to absolute zero called:
Correct answer:
Absolute pressure.Your Answer:
Pressure drop.13
The coil of a 12 V, 120 mA DC relay must be connected across a 24 V supply. What action should be taken?
Correct answer:
Install a 100 Ohm resistor in series with the coil.Your Answer:
Install a 100 Ohm resistor in parallel with the coil.14
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 3.15
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) = 1 A.16
Which personnel must undergo familiarization training on board?
Your answer is correct:
Everyone.17
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.18
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.19
Oil analysis results for a sample of diesel engine lubricating oil show a high level of tin. What could be the possible cause?
Your answer is correct:
Debris from damage to a white metal bearing.20
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.21
In case of a pollution in US waters, who shall notify the cleaning up contractor (OPA-90)?
Your answer is correct:
Qualified Individual.22
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.23
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.24
What is the best way to avoid pollution from small oil-spills aboard a ship?
Correct answer:
Contain any oil-spill onboard the ship.Your Answer:
Have dispersing chemicals ready for use in case of oil-spill.25
Which one of the listed requirements regarding abandon ship drills corresponds to present SOLAS regulation?
Your answer is correct:
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.26
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.27
Routine maintenance insulation testing of a three-phase induction motor should cover which measurements?
Your answer is correct:
U-E, V-E, W-E, U-V, V-W, W-U.28
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.29
Why is it important that the correct tension is maintained in a diesel engine timing chain?
Your answer is correct:
Correct tension ensures that the chain and associated equipment is within normal loading limits.30
How will continuous low load operation influence the time between overhauls, tbo, for the cylinder covers and associated valves of a 4-stroke diesel engine?
Your answer is correct:
Reduce the time between overhauls due to increasing fouling.31
In the circuit diagram shown the starter connects between which terminals?
Your answer is correct:
5 and 6.32
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?
Your answer is correct:
One or more cylinder air start valves are stuck open.33
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?
Correct answer:
As soon as possible but not later than 2 weeks after he joins the ship.Your Answer:
As soon as possible but not later than 24 hours after he joins the ship.34
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.35
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?
Correct answer:
Fuel viscosity.Your Answer:
Fuel density.36
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?
Your answer is correct:
The pressure is greater than the pressure in the lubricating system and varies with the journal load.37
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.38
The operating mode of a pyrotechnic signal depends essentially on:
Your answer is correct:
Instructions or diagrams printed on its casing by the manufacturer.39
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.40
A medium speed diesel engine is used to drive a controllable pitch propeller through a suitable clutch and reduction gearbox. What should the propeller blade attitude normally be after the engine is started and before the clutch can be engaged?
Your answer is correct:
The blades should be in the zero pitch position.41
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:
Correct answer:
Fouling of the hull.Your Answer:
Damaged propeller blade.42
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?
Correct answer:
60 ohm.Your Answer:
120 ohm.43
Why shall a duly qualified officer supervise any potential polluting operation?
Your answer is correct:
To avoid pollution.44
Some automated control systems use a master controller and a slave controller. What is the meaning of “remote mode” related to a slave controller?
Your answer is correct:
The slave controller receives the set-point from the output signal of the master controller.45
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.
Your answer is correct:
Set the proportional band to maximum width and the integral action to minimum (repeats per minute).46
What does ISM stand for?
Your answer is correct:
The International Management Code for the Safe Operation of Ships and for Pollution Prevention.47
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.48
In a distress situation, how many times or for how long should the emergency alarm signal be sounded?
Correct answer:
Until all crew members and passengers have reported to their respective muster stations.Your Answer:
3 minutes.49
When carrying out repair or maintenance tasks involving hot work a hot work permit must be issued. Select the correct option from those given which completes the following statement. The permit for hot work:
Your answer is correct:
Should only cover specific hot work tasks, be valid for a specified time period and be issued by the person carrying out the work.50
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.51
What is the advantage of a transmitter with a narrow measurement range?
Your answer is correct:
Better linearity and increased accuracy.52
What principle of measurement are viscosity controllers usually based on?
Correct answer:
Measurement of differential pressure.Your Answer:
Measurement of temperature.53
Which of the following is typical for a feed-forward control system?
Correct answer:
Control of the process inlet side.Your Answer:
The process continually oscillates.54
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.
Your answer is correct:
Reduced current and reduced torque.55
A draw card obtained from a cylinder of a large 2 stroke diesel engine shows that both cylinder compression and maximum pressures are low. Cards from other cylinders indicate normal operation. What is the likely cause of this problem?
Your answer is correct:
Faulty cylinder component (piston rings, liner, etc.).56
What should be the healthy continuity resistance of a 220V, 2,2kW, 10A heating element, when checked near to it’s rated operating temperature?
Your answer is correct:
22 Ohms.57
What is the maximum current that a 15 Volt, 3 Watt Zenerdiode can handle without damage?
Your answer is correct:
0,2 A.58
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.59
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?
Your answer is correct:
Control valve gland is over tightened.60
What is the correct operation of the slow-turning facility fitted to some large 2-stroke main propulsion diesel engines?
Your answer is correct:
Slow turning should be set to operate automatically prior to engine start when engine has been stopped for 20 to 30 minutes during manoeuvring.61
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.62
When measuring viscosity with a restricted flow viscometer, the preferred sensing device is:
Correct answer:
Capillary tube.Your Answer:
Bourdon tube.63
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?
Your answer is correct:
Apply reduced voltage to the element for a few minutes. Then retest, and if ok put into service.64
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 control the amount of fuel passing through the separator.65
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?
Correct answer:
Faulty contactor coil.Your Answer:
Open circuit in one of the motor cables.66
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?
Correct answer:
Replace the damaged chocks with resin based chocks of an appropriate size.Your Answer:
Replace the complete steel chocking system with a resin based system.67
Which of the options given is likely to be the reason for a drop in the charge air manifold pressure of a diesel engine operating with an exhaust gas turbocharger?
Correct answer:
Scavenge ports dirty.Your Answer:
Exhaust gas boiler fouled.68
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.69
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?
Your answer is correct:
Open circuit winding between W and U.70
A transformer overheats while taking a shore supply. Which is the likely cause?
Your answer is correct:
Incorrect frequency.71
Some ships generate electrical power at 440 V, but then step up this voltage to supply specific electrical equipment. One common example, may be to feed a large bow thruster. Why is this done?
Your answer is correct:
A large bow thruster will draw very large currents at low voltage. Being typically remote from the generator, significant voltage drops would occur at low voltage.72
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.73
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.74
Why is it necessary to have an effective ballast water management plan which includes provision for changing out ballast in open water rather than discharging ballast in coastal waters?
Your answer is correct:
To avoid the introduction of non-indigenous species of marine life from one area to another.75
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.76
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.77
Which of the following symptoms would indicate that the filter drier in a refrigeration circuit has become blocked?
Your answer is correct:
A large temperature drop across the drier.78
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?
Your answer is correct:
Slightly superheated low pressure gas.79
When measuring level of liquids with a conductivity level indicator, measurement is performed by:
Your answer is correct:
Electrodes.80