Test Online for Seamans about Engine, Management Level (CES v6.0)
Результаты прохождения теста
Тест состоял из 80 случайных вопросов.
Всего вопросов по данной теме: 118
Всего вопросов по данной теме: 118
Ваш результат: 86%
Правильные ответы:
1
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?
Ваш ответ правильный:
The blades should be in the zero pitch position.2
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?
Ваш ответ правильный:
To help to maintain the oil/water interface at the correct position.3
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?
Ваш ответ правильный:
Fuel viscosity.4
What principle of measurement are viscosity controllers usually based on?
Ваш ответ правильный:
Measurement of differential pressure.5
The operating mode of a pyrotechnic signal depends essentially on:
Ваш ответ правильный:
Instructions or diagrams printed on its casing by the manufacturer.6
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?
Ваш ответ правильный:
Apply reduced voltage to the element for a few minutes. Then retest and if ok put into service.7
The coil of a 12 V, 120 mA DC relay must be connected across a 24 V supply. What action should be taken?
Ваш ответ правильный:
Install a 100 Ohm resistor in series with the coil.8
Which personnel must undergo familiarization training on board?
Ваш ответ правильный:
Everyone.9
What should be the healthy continuity resistance of a 220V, 2,2kW, 10A heating element, when checked near to it’s rated operating temperature?
Ваш ответ правильный:
22 Ohms.10
The majority of conventions adopted under the auspices of IMO fall into which of the three main categories?
Правильный ответ:
Maritime Safety, Prevention of Marine pollution, Liability and compensation.Ваш ответ:
Maritime Safety, STCW, Maritime Security.11
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?
Ваш ответ правильный:
Scavenge ports dirty.12
Why is an automatic slow turning feature included in the start air system of many large 2 stroke diesel engines?
Ваш ответ правильный:
To avoid damage during start of the engine in case water or other liquid has gathered in the cylinders during an extended stop.13
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:
Ваш ответ правильный:
Fouling of the hull.14
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?
Ваш ответ правильный:
Slightly superheated low pressure gas.15
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?
Ваш ответ правильный:
The performance of the engine will be reduced noticeably.16
It is the Master’s responsibility to ensure that:
Ваш ответ правильный:
Concerned personnel carry out the on-board training programme effectively.17
A 3-phase cage rotor induction motor requires protection by a time delay overload trip. What is the reason for this?
Ваш ответ правильный:
It will allow for inrush current, or motor specific faults.18
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?
Ваш ответ правильный:
Disconnect the thermocouple lead from the controller, and replace it with a mV source.19
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?
Правильный ответ:
Clearing escape routes.Ваш ответ:
Preparation and launching of survival crafts.20
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?
Ваш ответ правильный:
ISM procedures in the ship’s safety manual.21
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?
Ваш ответ правильный:
The heavy fuel is unstable leading to excessive high viscosity sludge formation.22
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?
Правильный ответ:
Replace the damaged chocks with resin based chocks of an appropriate size.Ваш ответ:
Replace the complete steel chocking system with one using resilient mounts to accommodate movement and avoid further incidents of fretting.23
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?
Ваш ответ правильный:
Open circuit winding between W and U.24
In the context of an automated control system, which controller must be tuned first in a cascade control system?
Ваш ответ правильный:
The secondary controller.25
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?
Ваш ответ правильный:
60 ohm.26
Which of the following symptoms would indicate that the filter drier in a refrigeration circuit has become blocked?
Ваш ответ правильный:
A large temperature drop across the drier.27
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?
Ваш ответ правильный:
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
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?
Ваш ответ правильный:
+/- 50 °C.29
Which one of the listed requirements regarding abandon ship drills corresponds to present SOLAS regulation?
Ваш ответ правильный:
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.30
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?
Ваш ответ правильный:
Air in the fuel oil system.31
In case of a pollution in US waters, who shall notify the cleaning up contractor (OPA-90)?
Правильный ответ:
Qualified Individual.Ваш ответ:
The shipowner.32
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?
Ваш ответ правильный:
Flammable mixture is continuously present or present for long periods.33
The pyrotechnics used to transmit visual signals to other vessels, boats or aircrafts are of the following type:
Ваш ответ правильный:
All of the below mentioned.34
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?
Ваш ответ правильный:
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.35
What is the maximum current that a 15 Volt, 3 Watt Zenerdiode can handle without damage?
Ваш ответ правильный:
0,2 A.36
How can a lead-acid type battery be checked to confirm if it is fully charged or not?
Ваш ответ правильный:
Measure the relative density (specific gravity) of the electrolyte.37
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?
Ваш ответ правильный:
Between 0,1 and 1,0 Ohm.38
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?
Ваш ответ правильный:
Figure 1.39
When measuring viscosity with a restricted flow viscometer, the preferred sensing device is:
Ваш ответ правильный:
Capillary tube.40
In what kind of measuring equipment might we find a Bourdon-tube?
Ваш ответ правильный:
In a pressure transmitter.41
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?
Ваш ответ правильный:
60 Ohm.42
What type of dynamic forces may cause indent in plating on forecastle deck and main deck in way of pillars inside forecastle?
Ваш ответ правильный:
Pressure forces caused by green water on deck.43
What is the result of an “unusually large metacentric height”?
Ваш ответ правильный:
The vessel will roll slowly or be unstable.44
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?
Ваш ответ правильный:
Apply reduced voltage to the element for a few minutes. Then retest, and if ok put into service.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.
Правильный ответ:
Set the proportional band to maximum width and the integral action to minimum (repeats per minute).Ваш ответ:
Set the proportional band to minimum width and the integral action to maximum (repeats per minute).46
Two reference points for pressure exist, absolute zero and atmospheric pressure. What are pressures measured relative to absolute zero called:
Ваш ответ правильный:
Absolute pressure.47
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?
Ваш ответ правильный:
Have the fuel pump phased and calibrated in a test workshop.48
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?
Ваш ответ правильный:
6 Ohms.49
What is the correct operation of the slow-turning facility fitted to some large 2-stroke main propulsion diesel engines?
Ваш ответ правильный:
Slow turning should be set to operate automatically prior to engine start when engine has been stopped for 20 to 30 minutes during manoeuvring.50
In a distress situation, how many times or for how long should the emergency alarm signal be sounded?
Ваш ответ правильный:
Until all crew members and passengers have reported to their respective muster stations.51
When measuring level of liquids with a conductivity level indicator, measurement is performed by:
Ваш ответ правильный:
Electrodes.52
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?
Ваш ответ правильный:
To avoid the introduction of non-indigenous species of marine life from one area to another.53
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?
Ваш ответ правильный:
Electric motors will run at reduced speed, and will tend to overheat.54
In terms of automated control systems, what is typical for a continuous control system?
Ваш ответ правильный:
It is possible to predict the control mathematically.55
When considering instrumentation systems, what is a typical symptom of a fault with the span of an instrument?
Ваш ответ правильный:
Zero-point is accurate, but 100 % input is not giving 100 % output.56
What is the advantage of a transmitter with a narrow measurement range?
Ваш ответ правильный:
Better linearity and increased accuracy.57
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?
Правильный ответ:
Open circuit winding between W and U.Ваш ответ:
Short circuit winding between W and U.58
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?
Ваш ответ правильный:
120 °C.59
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?
Ваш ответ правильный:
30 volts.60
How often should the lifeboat wire falls be turned and renewed?
Ваш ответ правильный:
Turned at intervals of not more than 30 months and renewed every 5 years.61
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?
Ваш ответ правильный:
Stop bunkering, and establish facts, before bunkering is resumed.62
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?
Ваш ответ правильный:
One of the main switching elements in the triac has failed.63
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:
Ваш ответ правильный:
Should only cover specific hot work tasks, be valid for a specified time period and be issued by the person carrying out the work.64
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?
Ваш ответ правильный:
As soon as possible but not later than 2 weeks after he joins the ship.65
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?
Ваш ответ правильный:
Control valve gland is over tightened.66
Which of the following is typical for a feed-forward control system?
Ваш ответ правильный:
Control of the process inlet side.67
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.
Ваш ответ правильный:
I(2) = 4 A.68
A transformer overheats while taking a shore supply. Which is the likely cause?
Ваш ответ правильный:
Incorrect frequency.69
When selecting switchgear to work with High Voltage it is important to use an appropriate arcing medium. What is meant by arcing medium?
Ваш ответ правильный:
The gas, liquid or vapor, which will minimize creation of an electric arc as contacts open.70
When considering instrumentation systems, what is the meaning of the expression “dead-band”?
Правильный ответ:
The controller will not react to a process change in this range.Ваш ответ:
The controller will not respond to adjustment of set-point.71
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:
Правильный ответ:
The sampling filter is partially blocked giving rise to wide pressure variations in the sampling chamber.Ваш ответ:
The sampling filter is blocked preventing gas from entering the sampling camber.72
What is the purpose of the relief valves fitted to the doors and casing of 2-stroke diesel engine crankcases?
Ваш ответ правильный:
To relieve excess pressure in the crankcase resulting from a crankcase explosion.73
Routine maintenance insulation testing of a three-phase induction motor should cover which measurements?
Ваш ответ правильный:
U-E, V-E, W-E, U-V, V-W, W-U.74
A motor nameplate reads 75 hp. What is the reading in kW?
Ваш ответ правильный:
56 kW.75
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?
Ваш ответ правильный:
Circumferential slip of the after clamp ring in the opposite direction to shaft rotation.76
What does ISM stand for?
Правильный ответ:
The International Management Code for the Safe Operation of Ships and for Pollution Prevention.Ваш ответ:
Internal Ship Safety Management.77
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?
Правильный ответ:
Faulty cylinder component (piston rings, liner, etc.).Ваш ответ:
Faulty high pressure fuel pump.78
Who is responsible for ensuring that your ship’s security plan meets the requirements of the ISPS Code?
Правильный ответ:
Company Security Officer.Ваш ответ:
Flag State Administration.79
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.
Ваш ответ правильный:
Set the proportional band to maximum width and the integral action to minimum (repeats per minute).80