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: 100%
Right answers:
1
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.2
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.3
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.4
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.5
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.6
In case of a pollution in US waters, who shall notify the cleaning up contractor (OPA-90)?
Your answer is correct:
Qualified Individual.7
The operating mode of a pyrotechnic signal depends essentially on:
Your answer is correct:
Instructions or diagrams printed on its casing by the manufacturer.8
What does ISM stand for?
Your answer is correct:
The International Management Code for the Safe Operation of Ships and for Pollution Prevention.9
Why shall a duly qualified officer supervise any potential polluting operation?
Your answer is correct:
To avoid pollution.10
In the circuit diagram shown the starter connects between which terminals?
Your answer is correct:
5 and 6.11
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.12
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.13
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.14
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.15
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.16
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?
Your answer is correct:
Between 0,1 and 1,0 Ohm.17
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.18
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.19
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?
Your answer is correct:
6 Ohms.20
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.21
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.22
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.23
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.24
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.25
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.26
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.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
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?
Your answer is correct:
No.29
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.30
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.31
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.32
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.33
How often should the lifeboat wire falls be turned and renewed?
Your answer is correct:
Turned at intervals of not more than 30 months and renewed every 5 years.34
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.35
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.36
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.37
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.38
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.39
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.40
A transformer overheats while taking a shore supply. Which is the likely cause?
Your answer is correct:
Incorrect frequency.41
It is the Master’s responsibility to ensure that:
Your answer is correct:
Concerned personnel carry out the on-board training programme effectively.42
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.43
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.44
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.45
A transformer overheats while taking a shore supply. Which is the likely cause?
Your answer is correct:
Incorrect frequency.46
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.47
When measuring viscosity with a restricted flow viscometer, the preferred sensing device is:
Your answer is correct:
Capillary tube.48
When considering instrumentation systems, what is the meaning of the expression “dead-band”?
Your answer is correct:
The controller will not react to a process change in this range.49
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.50
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.51
What is the maximum current that a 15 Volt, 3 Watt Zenerdiode can handle without damage?
Your answer is correct:
0,2 A.52
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.53
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.54
The main propulsion diesel engine is normally started by direct admission of compressed air. Which one of the following statements is correct?
Your answer is correct:
A heavily leaking starting air valve may cause an explosion in the starting air pipe system.55
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.56
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.57
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.58
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.59
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.60
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.
Your answer is correct:
I(2) = 4 A.61
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.62
What is the result of an “unusually large metacentric height”?
Your answer is correct:
The vessel will roll slowly or be unstable.63
Which personnel must undergo familiarization training on board?
Your answer is correct:
Everyone.64
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?
Your answer is correct:
Increase cylinder oil feed rate slightly and monitor the scavenge space drains.65
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.66
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.67
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).68
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.69
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.70
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.71
In what kind of measuring equipment might we find a Bourdon-tube?
Your answer is correct:
In a pressure transmitter.72
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.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.
Your answer is correct:
Set the proportional band to maximum width and the integral action to minimum (repeats per minute).74
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.75
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.76
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 1.77
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.78
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.79
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.80