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: 98%
Right answers:
1
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.2
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.3
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.4
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).5
You are in charge of a night bunkering operation. The delivery rate from the supplier is high and you are filling six tanks simultaneously. You lose track of the progress of the operation and feel that you are losing control of the situation. What action should you take?
Your answer is correct:
Stop bunkering, and establish facts, before bunkering is resumed.6
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.7
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.8
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.9
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.10
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?
Your answer is correct:
30 volts.11
In what kind of measuring equipment might we find a Bourdon-tube?
Your answer is correct:
In a pressure transmitter.12
A transformer overheats while taking a shore supply. Which is the likely cause?
Your answer is correct:
Incorrect frequency.13
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?
Your answer is correct:
One of the main switching elements in the triac has failed.14
The turbocharger on a diesel engine is surging. Which one of the following options would be the most likely cause?
Your answer is correct:
Dirty scavenging air cooler on the air side.15
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.16
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.17
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.18
It is the Master’s responsibility to ensure that:
Your answer is correct:
Concerned personnel carry out the on-board training programme effectively.19
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?
Your answer is correct:
Figure 1.20
In which of the following automated control processes will the time constant be of minor importance?
Your answer is correct:
Level control.21
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.22
What is the result of an “unusually large metacentric height”?
Your answer is correct:
The vessel will roll slowly or be unstable.23
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.24
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.25
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.26
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.27
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?
Your answer is correct:
To help to maintain the oil/water interface at the correct position.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
What kind of electrolyte is used for Nickel-iron batteries?
Your answer is correct:
Solution of potassium hydroxide (KOH) and water.30
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.31
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.32
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.33
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.34
A motor nameplate reads 75 hp. What is the reading in kW?
Your answer is correct:
56 kW.35
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.36
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.37
Low voltage ships tend to have insulated neutral systems. What is the reason for this?
Your answer is correct:
In the event of an earth fault vital equipment will not trip.38
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.39
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.40
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.41
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.42
What does ISM stand for?
Your answer is correct:
The International Management Code for the Safe Operation of Ships and for Pollution Prevention.43
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.44
When measuring level of liquids with a conductivity level indicator, measurement is performed by:
Your answer is correct:
Electrodes.45
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.46
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?
Your answer is correct:
Scavenge ports dirty.47
Why shall a duly qualified officer supervise any potential polluting operation?
Your answer is correct:
To avoid pollution.48
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.49
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.50
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?
Correct answer:
Between 0,1 and 1,0 Ohm.Your Answer:
Between 0,1 and 1,0 M Ohm.51
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.52
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.53
A transformer overheats while taking a shore supply. Which is the likely cause?
Your answer is correct:
Incorrect frequency.54
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.55
What is the advantage of a transmitter with a narrow measurement range?
Correct answer:
Better linearity and increased accuracy.Your Answer:
Do not need any calibration.56
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.57
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.58
In terms of automated control systems, what is typical for a continuous control system?
Your answer is correct:
It is possible to predict the control mathematically.59
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?
Your answer is correct:
The heavy fuel is unstable leading to excessive high viscosity sludge formation.60
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.61
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?
Your answer is correct:
120 °C.62
What is the best way to avoid pollution from small oil-spills aboard a ship?
Your answer is correct:
Contain any oil-spill onboard the ship.63
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.64
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.65
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.66
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.).67
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.68
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.69
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.70
When turning a cascade control system, which of the following actions should be done first?
Your answer is correct:
Adjust the slave controller with the master controller in manual mode.71
What is the maximum current that a 15 Volt, 3 Watt Zenerdiode can handle without damage?
Your answer is correct:
0,2 A.72
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.73
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.74
When measuring viscosity with a restricted flow viscometer, the preferred sensing device is:
Your answer is correct:
Capillary tube.75
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.76
When considering instrumentation systems, what is a typical symptom of a fault with the span of an instrument?
Your answer is correct:
Zero-point is accurate, but 100 % input is not giving 100 % output.77
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.78
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.79
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.80