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: 88%
Правильные ответы:
1
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.2
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).3
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.4
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.5
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.6
Why shall a duly qualified officer supervise any potential polluting operation?
Ваш ответ правильный:
To avoid pollution.7
What is the best way to avoid pollution from small oil-spills aboard a ship?
Ваш ответ правильный:
Contain any oil-spill onboard the ship.8
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.9
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.10
In case of pollution in US waters, do you always have to notify the National Response Center (OPA-90)?
Ваш ответ правильный:
Yes, within thirty (30) minutes.11
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.12
A motor nameplate reads 75 hp. What is the reading in kW?
Ваш ответ правильный:
56 kW.13
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.14
How can the pressure be regulated during start up of a positive displacement pump such as a gear pump?
Ваш ответ правильный:
Adjustment of the pressure relief valve to recirculate part of the flow.15
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.16
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.17
It is the Master’s responsibility to ensure that:
Правильный ответ:
Concerned personnel carry out the on-board training programme effectively.Ваш ответ:
Life jackets are worn during every training.18
The main propulsion diesel engine is normally started by direct admission of compressed air. Which one of the following statements is correct?
Ваш ответ правильный:
A heavily leaking starting air valve may cause an explosion in the starting air pipe system.19
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?
Правильный ответ:
Have the fuel pump phased and calibrated in a test workshop.Ваш ответ:
Measure the maximum pressure of each cylinder to check that they are equal.20
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.21
The coil of a 12 V, 120 mA DC relay must be connected across a 24 V supply. What action should be taken?
Правильный ответ:
Install a 100 Ohm resistor in series with the coil.Ваш ответ:
Install a 100 k Ohm resistor in series with the coil.22
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.23
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.24
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.25
In the circuit diagram shown the starter connects between which terminals?
Ваш ответ правильный:
5 and 6.26
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?
Ваш ответ правильный:
Circumferential slip of the after clamp ring in the opposite direction to shaft rotation.27
In case of a pollution in US waters, who shall notify the cleaning up contractor (OPA-90)?
Ваш ответ правильный:
Qualified Individual.28
Some automated control systems use a master controller and a slave controller. What is the meaning of “remote mode” related to a slave controller?
Ваш ответ правильный:
The slave controller receives the set-point from the output signal of the master controller.29
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:
Ваш ответ правильный:
The sampling filter is partially blocked giving rise to wide pressure variations in the sampling chamber.30
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.31
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).32
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.33
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?
Правильный ответ:
6 Ohms.Ваш ответ:
2 Ohms.34
When measuring viscosity with a restricted flow viscometer, the preferred sensing device is:
Ваш ответ правильный:
Capillary tube.35
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.36
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.37
How is a Safety Management Certificate obtained?
Ваш ответ правильный:
Ship owner has Document of Compliance issued, and vessel is assessed and holds all statutory certificates.38
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.39
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.40
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.41
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.42
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?
Ваш ответ правильный:
Clearing escape routes.43
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?
Правильный ответ:
2,2 Ohms.Ваш ответ:
22 Ohms.44
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.45
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.46
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.47
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.48
In the context of an automated process control system, what is understood by the expression Master Controller?
Ваш ответ правильный:
The primary controller in a cascade control system.49
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?
Правильный ответ:
Check if the fuel injection pump timing is correct.Ваш ответ:
Check if the fuel injection valve is partly blocked.50
A 250 V contactor has been fitted to a 220 V supply. Which of the following symptoms might be observed?
Ваш ответ правильный:
Contactor chattering (vibrating).51
A 3-phase cage rotor induction motor requires protection by a time delay overload trip. What is the reason for this?
Правильный ответ:
It will allow for inrush current, or motor specific faults.Ваш ответ:
Fuses act too slowly.52
When turning a cascade control system, which of the following actions should be done first?
Ваш ответ правильный:
Adjust the slave controller with the master controller in manual mode.53
In which of the following automated control processes will the time constant be of minor importance?
Ваш ответ правильный:
Level control.54
When performing electrical testing of a three phase motor, insulation resistance measurements may be influenced by which of the following?
Правильный ответ:
Temperature, humidity and surface contamination.Ваш ответ:
Humidity, pressure and surface contamination.55
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.56
In what kind of measuring equipment might we find a Bourdon-tube?
Ваш ответ правильный:
In a pressure transmitter.57
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.58
What kind of electrolyte is used for Nickel-iron batteries?
Ваш ответ правильный:
Solution of potassium hydroxide (KOH) and water.59
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?
Ваш ответ правильный:
0,2 to 0,5 bar.60
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.61
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?
Правильный ответ:
To ensure that no energy remains in the system, and that it cannot be recharged by external influences.Ваш ответ:
To ensure that the equipment does not overheat due to currents circulating through earth (ground).62
Who is responsible for ensuring that your ship’s security plan meets the requirements of the ISPS Code?
Ваш ответ правильный:
Company Security Officer.63
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.64
Which is the preferred method for starting an air conditioning refrigeration compressor which has been shut down for a period of time?
Ваш ответ правильный:
Start with suction valve throttled in to minimise risk of drawing liquid refrigerant into the compressor.65
Which of the following is typical for a feed-forward control system?
Ваш ответ правильный:
Control of the process inlet side.66
Oil analysis results for a sample of diesel engine lubricating oil show a high level of tin. What could be the possible cause?
Ваш ответ правильный:
Debris from damage to a white metal bearing.67
A transformer overheats while taking a shore supply. Which is the likely cause?
Ваш ответ правильный:
Incorrect frequency.68
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?
Ваш ответ правильный:
Rotten eggs.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
Why is it important that the correct tension is maintained in a diesel engine timing chain?
Ваш ответ правильный:
Correct tension ensures that the chain and associated equipment is within normal loading limits.71
Low voltage ships tend to have insulated neutral systems. What is the reason for this?
Ваш ответ правильный:
In the event of an earth fault vital equipment will not trip.72
What is the result of an “unusually large metacentric height”?
Ваш ответ правильный:
The vessel will roll slowly or be unstable.73
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?
Ваш ответ правильный:
No.74
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.75
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?
Ваш ответ правильный:
The pressure is greater than the pressure in the lubricating system and varies with the journal load.76
Worn piston rings are allowing a small amount of piston blow-by on a 2-stroke main diesel engine cylinder, but due to the circumstances, it is not possible to stop and do a piston overhaul. What is the correct, temporary action to take?
Ваш ответ правильный:
Increase cylinder oil feed rate slightly and monitor the scavenge space drains.77
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?
Правильный ответ:
60 Ohm.Ваш ответ:
120 Ohm.78
The majority of conventions adopted under the auspices of IMO fall into which of the three main categories?
Ваш ответ правильный:
Maritime Safety, Prevention of Marine pollution, Liability and compensation.79
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.80