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: 28%
Right answers:
1
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.2
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.3
When measuring viscosity with a restricted flow viscometer, the preferred sensing device is:
Correct answer:
Capillary tube.Your Answer:
Rotating cylinder.4
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?
Correct answer:
2,2 Ohms.Your Answer:
0,22 Ohms.5
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:
480 ohm.6
The engine turns over normally when starting air is supplied but does not fire even though normal starting rpm is achieved. What could be the probable cause to this?
Correct answer:
Air in the fuel oil system.Your Answer:
The turning gear interlock has operated.7
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:
Sea water temperature changing.8
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?
Correct answer:
To avoid the introduction of non-indigenous species of marine life from one area to another.Your Answer:
To ensure that ballast tanks are always pressed up during a ballast voyage to avoid free surface effects.9
A transformer overheats while taking a shore supply. Which is the likely cause?
Your answer is correct:
Incorrect frequency.10
In which of the following automated control processes will the time constant be of minor importance?
Correct answer:
Level control.Your Answer:
Temperature control.11
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.12
Why is an automatic slow turning feature included in the start air system of many large 2 stroke diesel engines?
Correct answer:
To avoid damage during start of the engine in case water or other liquid has gathered in the cylinders during an extended stop.Your Answer:
To check that all indicator cocks are closed before starting engine.13
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.14
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.15
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:
Discard the element.16
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 the same as the pressure in the lubricating system regardless of the journal load.17
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:
I don’t know.18
A motor nameplate reads 75 hp. What is the reading in kW?
Your answer is correct:
56 kW.19
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?
Correct answer:
The performance of the engine will be reduced noticeably.Your Answer:
The cylinder cooling water flow will increase.20
In what kind of measuring equipment might we find a Bourdon-tube?
Correct answer:
In a pressure transmitter.Your Answer:
In an A/D converter.21
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?
Correct answer:
To ensure that no energy remains in the system, and that it cannot be recharged by external influences.Your Answer:
To ensure that it is dead, even if there was a flaw in the isolation procedure.22
When considering instrumentation systems, what is a typical symptom of a fault with the span of an instrument?
Correct answer:
Zero-point is accurate, but 100 % input is not giving 100 % output.Your Answer:
100 % output is accurate, but Zero-point is wrong.23
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:
An interlock is blocking the air to the starting air distributor.24
What is the purpose of the relief valves fitted to the doors and casing of 2-stroke diesel engine crankcases?
Correct answer:
To relieve excess pressure in the crankcase resulting from a crankcase explosion.Your Answer:
To relieve excess pressure in the crankcase resulting from piston rod gland leakage.25
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.26
The majority of conventions adopted under the auspices of IMO fall into which of the three main categories?
Correct answer:
Maritime Safety, Prevention of Marine pollution, Liability and compensation.Your Answer:
Safety, Terrorism, ILO.27
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.28
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:
I don’t know.29
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:
I don’t know.30
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.31
What principle of measurement are viscosity controllers usually based on?
Correct answer:
Measurement of differential pressure.Your Answer:
Measurement of temperature.32
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.33
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?
Correct answer:
Check if the fuel injection pump timing is correct.Your Answer:
Check if the fuel filters are blocked.34
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.35
The operating mode of a pyrotechnic signal depends essentially on:
Correct answer:
Instructions or diagrams printed on its casing by the manufacturer.Your Answer:
The weather conditions of the moment.36
When measuring level of liquids with a conductivity level indicator, measurement is performed by:
Correct answer:
Electrodes.Your Answer:
Capacitance probe.37
Some ships generate electrical power at 440 Volts, 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.38
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.39
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:
Greater than 1 M Ohm.40
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:
Sub-cooled liquid at low pressure.41
A 3-phase cage rotor induction motor requires protection by a time delay overload trip. What is the reason for this?
Your answer is correct:
It will allow for inrush current, or motor specific faults.42
In the context of an automated control system, which controller must be tuned first in a cascade control system?
Correct answer:
The secondary controller.Your Answer:
I don’t know.43
The main propulsion diesel engine is normally started by direct admission of compressed air. Which one of the following statements is correct?
Correct answer:
A heavily leaking starting air valve may cause an explosion in the starting air pipe system.Your Answer:
If the engine does not turn when the starting air is applied the turning gear can be used together with starting air to start the engine.44
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) = 8 A.45
Which personnel must undergo familiarization training on board?
Correct answer:
Everyone.Your Answer:
Only the deck officers.46
What type of dynamic forces may cause indent in plating on forecastle deck and main deck in way of pillars inside forecastle?
Correct answer:
Pressure forces caused by green water on deck.Your Answer:
Forces created by waves on the forecastle.47
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?
Correct answer:
Rotten eggs.Your Answer:
Rotten fish.48
What type of dynamic forces may cause indent in plating on forecastle deck and main deck in way of pillars inside forecastle?
Correct answer:
Pressure forces caused by green water on deck.Your Answer:
Slamming in way of flat bottom forward of light draught.49
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.50
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.51
What kind of electrolyte is used for Nickel-iron batteries?
Correct answer:
Solution of potassium hydroxide (KOH) and water.Your Answer:
I don’t know.52
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:
Correct answer:
The sampling filter is partially blocked giving rise to wide pressure variations in the sampling chamber.Your Answer:
Nitrogen gas is present in the atmosphere.53
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 temperature.54
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.55
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 one using resilient mounts to accommodate movement and avoid further incidents of fretting.56
What is the result of an “unusually large metacentric height”?
Your answer is correct:
The vessel will roll slowly or be unstable.57
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.58
What does ISM stand for?
Correct answer:
The International Management Code for the Safe Operation of Ships and for Pollution Prevention.Your Answer:
International Safe Manning Certification.59
A transformer overheats while taking a shore supply. Which is the likely cause?
Your answer is correct:
Incorrect frequency.60
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:
Connection between the demand knob and the triac gate terminal has gone open circuit.61
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:
Vacuum pressure.62
Which of the following is typical for a feed-forward control system?
Correct answer:
Control of the process inlet side.Your Answer:
Mathematical calculation of the system response.63
How often should the lifeboat wire falls be turned and renewed?
Correct answer:
Turned at intervals of not more than 30 months and renewed every 5 years.Your Answer:
Renewed every three years.64
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:
Correct answer:
Should only cover specific hot work tasks, be valid for a specified time period and be issued by the person carrying out the work.Your Answer:
Should only cover specific hot work tasks and be valid for a specified time period.65
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?
Correct answer:
Circumferential slip of the after clamp ring in the opposite direction to shaft rotation.Your Answer:
Axial slip of one of the clamp rings to move them further apart.66
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?
Correct answer:
ISM procedures in the ship’s safety manual.Your Answer:
Engine room log book.67
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?
Correct answer:
Reduce the time between overhauls due to increasing fouling.Your Answer:
Increase the time between overhauls since fuel injectors work better at low load so combustion will be improved and the maintenance will be reduced.68
A transformer overheats while taking a shore supply. Which is the likely cause?
Correct answer:
Incorrect frequency.Your Answer:
Incorrect current.69
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?
Correct answer:
Clearing escape routes.Your Answer:
Preparation and launching of survival crafts.70
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.71
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.72
What is the advantage of a transmitter with a narrow measurement range?
Your answer is correct:
Better linearity and increased accuracy.73
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 maximum (repeats per minute).74
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.75
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:
I don’t know.76
When the cable length exceeds approx. 10 meters we normally have to, in case of a Pt 100, in some way compensate for the cable resistance. Do we also have to do this if we choose to use a T802 temperature sensor?
Correct answer:
No.Your Answer:
Not applicable.77
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.78
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.79
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:
I don’t know.80