Test Online and Answers for Marine Engineering and Navigation (CES v6.0)
Результаты прохождения теста
Тест состоял из 80 случайных вопросов.
Всего вопросов по данной теме: 135
Всего вопросов по данной теме: 135
Ваш результат: 85%
Правильные ответы:
1
Which of the following is true when comparing plate type with shell and tube type heat exchangers?
Правильный ответ:
All of the above.Ваш ответ:
Better sealing between liquids in shell and tube.2
What shall you do if you see a person falling into the sea?
Ваш ответ правильный:
Throw a lifebuoy overboard and report to the bridge immediately.3
How far from the coast is it permitted to use low-pressure evaporation to produce drinking water?
Ваш ответ правильный:
20 miles.4
Which one of the listed fire extinguishing medium is most effective against an open oil fire?
Ваш ответ правильный:
Foam.5
How is temperature controlled in a steam oil heater?
Ваш ответ правильный:
Steam outlet valve throttled.6
Which of the following is a rotary compressor?
Правильный ответ:
Diesel engine charge air compressor.Ваш ответ:
Control air compressor.7
A receiver in a refrigeration system is used to:
Ваш ответ правильный:
Store the refrigerant.8
Modern high pressure boilers produce which of the following?
Ваш ответ правильный:
Superheated steam.9
What is meant by “synchronism or resonance”?
Ваш ответ правильный:
This is a dangerous condition that occurs when the ship’s still water period and the apparent wave period are equal.10
Boiler feed water is water:
Ваш ответ правильный:
Taken from the condenser and fed back to the boiler.11
You are underway on a power driven vessel in open water, when you see another power driven vessel approximately five miles straight ahead on an opposite course. What action do you take?
Ваш ответ правильный:
Make a bold alternation to starboard and pass on his port side.12
What is the centre of pressure?
Ваш ответ правильный:
It is the pressure in the centre of a specific tank.13
Which of these requirements regarding lifebuoys corresponds to the SOLAS regulations?
Правильный ответ:
It must be constructed of inherently buoyant material.Ваш ответ:
It must have sufficient air.14
What is the critical time in a dry docking operation?
Правильный ответ:
Just before the ship takes the blocks at the stern.Ваш ответ:
As the ship enters the dock gates, to ensure she is not moving too fast.15
What do the intersecting horizontal lines signify in the diagram?
Ваш ответ правильный:
They show the actual angle of trim.16
What liquid is present in the collecting point at the bottom of the evaporator?
Ваш ответ правильный:
Brine.17
The indications of a faulty refrigeration compressor valve are:
Ваш ответ правильный:
Any of the alternatives.18
Name the two (2) different lubrication oil circuits of a steam turbine:
Ваш ответ правильный:
The bearing and gear oil circuit/the governor oil circuit.19
What is the purpose of the corrugations on a plate heat exchanger?
Ваш ответ правильный:
All of the above.20
On the air compressor crankcase, there is a small valve that let’s off pressure. What should be done if oil is present with air?
Ваш ответ правильный:
Overhaul the compressor unit.21
Why is the maximum pressure in a plate heat exchanger usually limited to about 10 bar?
Ваш ответ правильный:
Difficult to seal plates above this pressure.22
In case of a fire inside the acetylene-line in the AC/OX gas welding equipment, what action is deemed necessary?
Ваш ответ правильный:
Close the valves on both acetylene and the oxygen bottles.23
Turbo alternators perform which of the following tasks?
Ваш ответ правильный:
Supplying electricity on steamships when the main boiler is operating.24
In a refrigeration system, a fluid that serves only as a heat carrier is called the:
Ваш ответ правильный:
Secondary refrigerant.25
What are “cross curves” of stability used for onboard a ship?
Ваш ответ правильный:
Obtaining statical stability curves at known displacements.26
What is the source of energy used to convert salt water into fresh water in the fresh water generator?
Ваш ответ правильный:
The waste heat from the main engine.27
What is the purpose of performing an inclining experiment or stability test?
Ваш ответ правильный:
It is done to find out the GM of a vessel, place the ship’s lightweight and VCG and LCG at this lightweight.28
What is the reason for the effect we call squat?
Ваш ответ правильный:
Increased velocity and decreased water pressure around the ship’s hull.29
What is prismatic co-efficient?
Ваш ответ правильный:
Volume of displacement / (midship area × LBP). Also = cb / cm.30
What is item No. 9 shown in the diagram, fitted between evaporator and condenser of the fresh water generator?
Ваш ответ правильный:
A water deflector.31
What kind of shaft seals are used on this high pressure turbine?
Ваш ответ правильный:
Labyrinth seals.32
What is the result of a high metacentric height?
Ваш ответ правильный:
The vessel will roll violently.33
How can you minimize the squat effect?
Ваш ответ правильный:
Decrease the speed as much as practicable.34
In a two stage compressor, you will find pistons with different diameters (one is bigger than the other). Which one of the following statement is correct?
Ваш ответ правильный:
The smallest diameter piston is the stage two piston.35
Your ship is going astern right-handed propeller as sketched below. How is the ship most likely to react?
Ваш ответ правильный:
The stern will back into the wind.36
High pressure steam turbines are:
Ваш ответ правильный:
Smaller than low pressure turbines.37
Anyone of the crew who is assigned to watch duties in ports has a number of important tasks to carry out. Which one of the listed tasks has to be included in the watchman’s duties?
Ваш ответ правильный:
Checking the moorings for tightness/slack.38
Does liquid turbulence improve the efficiency of a plate heat exchanger?
Ваш ответ правильный:
Yes.39
What is the reason for too rising cooling water temperature at outlet of individual cylinders?
Ваш ответ правильный:
Cooling water spaces insufficiently vented.40
What is the BM for a box-shaped vessel in terms of breadth and draught?
Ваш ответ правильный:
Breadth squared / 12 × draught.41
What is part number 1 called?
Правильный ответ:
The service tank.Ваш ответ:
The setting tank.42
If your vessel is tending to “synchronise”, what should you do to alter this condition?
Ваш ответ правильный:
You should try to alter the wave period by altering course and by reducing speed.43
What is a pro-metacenter?
Правильный ответ:
This expresses KM as moving away off the centreline at large angles of heel.Ваш ответ:
It is the ability of a vessel to return to an upright position.44
The diagram shows loadline marks. How is the distance between S and T calculated?
Ваш ответ правильный:
One forty eighth of the summer draft.45
When you join a new ship, how are you informed about safety rules, alarm instructions and your own duties in case of an emergency?
Ваш ответ правильный:
By muster lists exhibited in conspicuous places.46
If mouth-to-mouth (M-T-M) ventilation by itself is unsuccessful and the casualty’s heart stops or has stopped beating, you must perform external chest compression (ECC) in conjunction with M-T-M. What is the complete rate when performing ECC?
Ваш ответ правильный:
Complete 15 compressions at the rate of 80 compressions per minute.47
What is a “Rescue Unit” (RU)?
Ваш ответ правильный:
A unit composed of trained personnel suitability equipped for expeditious search and rescue.48
Which of these requirements regarding the launching and recovery arrangements for rescue boats corresponds to the SOLAS regulations?
Ваш ответ правильный:
Rapid recovery shall be possible with the boat’s full complement of persons and equipment.49
Which way does the steam pass through in the system?
Ваш ответ правильный:
From the high pressure turbine to the low pressure turbine.50
The ship’s training manual must contain instructions and information on the life saving appliances carried onboard. Which of these duties must be included?
Ваш ответ правильный:
Correct launching, boarding and clearing of survival craft and rescue craft.51
What is statical stability?
Ваш ответ правильный:
It is the ability of a vessel to return to her initial or upright position, after having been forcibly inclined.52
What can be used to reduce the effect of the state of sea-waves?
Ваш ответ правильный:
Vegetable/fish oil.53
Which of the following statements regarding main boilers is NOT true?
Ваш ответ правильный:
The feed water need not be very pure.54
Which of the following statements regarding steam turbines is NOT true?
Ваш ответ правильный:
From the HP turbine, the steam then goes to the condenser.55
What formula do you use to determine the GM from an inclining experiment?
Ваш ответ правильный:
GM = w by distance by length of plumbline divided by W by deflection of the plumbline.56
What measures regarding ship stability should be taken in order to make a passenger ship’s able to withstand critical damage?
Правильный ответ:
Maintain sufficient intact stability.Ваш ответ:
Avoid overloading the ship.57
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 respect muster stations.58
If the fresh water generator is producing water with salinity of 5 ppm and is changed to produce water of 2 ppm, this is mainly achieved by:
Правильный ответ:
Slowing down production by opening the vacuum breaker valve.Ваш ответ:
Throttling sea water feed supply to the evaporator.59
In the shown situation, the bow of your ship is pushed away from the bank. How can you handle this?
Правильный ответ:
Give starboard rudder in order to balance the force of the bank effect and rudder effect.Ваш ответ:
Give hard port rudder to get the ship back in the middle of the channel.60
What is the “wave period”?
Ваш ответ правильный:
It is the time in seconds between successive wave crests or troughs, passing a fixed point.61
How is a “turning couple” formed?
Правильный ответ:
Couple is formed when two equal parallel forces in a vertical position are acting in opposite direction.Ваш ответ:
A couple is formed when two unequal parallel forces are acting in the same direction.62
The Disc type oil separator can usually separate water from oil when processing oils between which density ranges?
Ваш ответ правильный:
0,78 to 0,98.63
How often shall each member of the crew participate in an abandon ship drill?
Ваш ответ правильный:
Once every month.64
You are to release the towing wire with forerunner. You have 3 men with you to do the work. How do you do it in a safe way?
Ваш ответ правильный:
Use the winch. Forerunner and wire stopper to pick up the slack and stop the wire. One man operating each. Make the forerunner fast on the bit, releasing the eye of wire and the stopper, lower the wire easy by forerunner.65
What is the minimum allowable value for GZ?
Ваш ответ правильный:
0,2 m.66
You are about to pass another ship in a close situation. What can happen in this situation?
Ваш ответ правильный:
Due to suction, the two ships will be sucked together.67
How will the ship behave if you have a black out in the situation sketched below?
Правильный ответ:
She will turn to port and the speed will drop gradually.Ваш ответ:
She will continue on course and the speed will slowly drop.68
What kind of steam is feeding the astern turbine fitted on the same rotor as the LP turbine?
Ваш ответ правильный:
Steam from the main steam manifold via manoeuvring stand.69
How many hand flares should each lifeboat normally carry?
Ваш ответ правильный:
6.70
Which of the equipment listed is not included in the fireman’s personal equipment? (SOLAS II-2/17.1.1).
Ваш ответ правильный:
Leather safety boots and gloves.71
In a modern steam turbine steam is prevented from leaking along the shaft by:
Ваш ответ правильный:
A labyrinth seal.72
Which alarm and shut-down device is fitted on the thrust bearing assembly?
Ваш ответ правильный:
The axial clearance alarm.73
What is the formula to calculate the volume of displacement?
Правильный ответ:
B by Km by d by cb.Ваш ответ:
L by B by d by cb.74
What does permeability mean?
Ваш ответ правильный:
The relationship between the volume of a compartment and the volume available for water if bilged.75
Which part in this diagram is the high pressure turbine?
Ваш ответ правильный:
2.76
The passage of electrical current through the body may result in severe and sometimes fatal injuries. You are witness to a man getting electric current through his body and is stuck to the dangerous area. It is impossible to switch off the current by any main switch. How can you break the current safely?
Ваш ответ правильный:
Stand on dry insulating material and pull the person away with insulating material.77
What effects does freeboard have on a vessel’s dynamical stability?
Ваш ответ правильный:
As freeboard increases, the range of stability also increases, and this in turn leads to a greater dynamical stability.78
What kind of safety protection is to be weared during a mooring operation?
Ваш ответ правильный:
Helmet, safety shoes, gloves and protecting cloths.79
What activity will have the greatest fire fighting effect in case of a fire?
Ваш ответ правильный:
Extinguishing attempt is started immediately.80