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Онлайн-тестування: Test online CES 5.1 for Ch-Eng / 2nd-Eng
Онлайн-тест
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Тест складається із випадкових питань з обраної теми.
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Where on board would you find out which fire sections are enclosed by "A" or "B" class divisions?
In the stability book
On the capacity plan
On the fire control plan
On the general arrangement plan
Which of the following is a combustion reaction?
All the answers are good
Open fire
Smouldering fire
Explosion
What is the general requirement for closing mechanisms for in- and outlets of all ventilation systems (ships other than passenger ships carrying more than 36 passengers)? (SOLAS II-2/16.9)
To be remotely controlled from central fire control panel
Automatic closure for each section to be activated by the fire detection and alarm system
Only manually closing mechanism allowed
Closing must be possible from outside the spaces being ventilated
*A fault in the fire detection and fire alarm systems will be indicated:
By fully automatic separate test boards where any faulty condition is initiated by audible and visual signals
By audible and visual signals at the control panel, distinct from the fire signal
By the general alarm
By the fire signal
*In a ship that is not fitted with a main fire control room, where is the control panel of a fixed fire detection system located?
Відповісти
What manoeuvre should be carried out in case of a fire onboard a ship?
Let the ship follow the wind in order to reduce the oxygen supply
Continue on course and speed
Reduce speed and, if possible, keep the fire zone to the leeward of the ship
Keep the stem up against the wind if possible
What will be the minimum volume of halon to extinguish a fire in an enclosed room?
10% of the volume of the room
15% of the volume of the room
4.25% of the volume of the room
20% of the volume of the room
*The temperature control system of the main engine crankshaft bearings indicates high temperature. What would be the correct way to open and check the crankcase?
Stop the engine immediately, stop the lube oil pump, and inspect the crankcase after 5 minutes
Stop the engine and open crankcase down immediately for inspection
Reduce the RPM to a minimum and open the crankcase doors carefully
Stop the engine immediately and keep the lube oil pump running for at least 20 minutes before opening the crankcase
Instructions for "Preparation for welding or hot work in cargo tanks" is laid down by the Norwegian Maritime Directorate. Which of the following requirements regarding welding or hot work corresponds to these instructions?
For a ship at sea, at least 24 hours shall have elapsed from completion of tank cleaning to the tank may be entered.
The entering permit shall be signed by the safety officer only.
The entering permit shall be based on the check-list for gas freeing and check-list for equipment and preparedness.
The entering permit shall be signed by the Sen.Off.Deck only.
In the radio telex-traffic the landline-connection with a subscriber ashore will be broken with the following command:
msg+
NNNN
kkkk
brk+
What is false regarding the function :” Transmission and reception of signals for locating ”
On area A2 this function is based on the use of SART transponders
On all areas this function is based on the use of S band radars
On area A3 and A4 this function is based on the use of SARSAT COSPAS Epirb
On area A1 this function is based on the use of SART transponders
Sun rays and light reflected from a bright surface (e.g. sea); can cause damage to the skin and eyes. What is this type of burn called?
Dry burns.
Cold burns.
Electrical burns.
Radiation burns.
MARPOL 73/78 - Annex V. Disposal of garbage outside "Special Areas". After unpacking spares, you are left with a limited amount of packing materials. What will be the nearest distance to land for disposal into the sea of this materials?
50 miles
25 miles
3 miles
12 miles
Two vessels are meeting each other in confined waters. What would be the effects of interaction between the two vessels as they approach each other?
The bows of the ships will be sucked together
There will be no effects in these circumstances
Each vessel will experience an increase in speed
The bows of the ships will be pushed away from each other
Do you think a ship's trim has any influence on steering abilities?
Yes, a ship usually steers better if trimmed by the bow
No, it is usually best to have no trim at all
Yes, the ship usually steers better if trimmed by the stern
No, the ship will have the same steering ability unaffected by trim
According to the “Regulation and Restrictions” of the mariphone license, the mariphone:
apart from its position as indicated also be used in other places provided its call sign is at least transmitted once at the start and at the end of each transmission
Don't know
may only be present at the place, as indicated in the license
may be taken off the ship temporarily, only if suitable measures are taken for the prevention of the use of the mariphone
What is most important when preparing for emergencies?
That people listen to orders given.
That people are well trained.
That people know where to find designated equipment.
That people know where to muster.
A lifejacket must not sustain burning or continue melting after being totally enveloped in a fire for a period of:
20 sec
10 sec
2 sec
1mn
Which item among those below is included in the normal equipment of every rescue boat ?
anti-seasickness medicine sufficient for at least 48h and one seasickness bag for each person
a buoyant bailer
one copy of the prescribed life saving signals on a waterproof card
a food ration for each person as
Which item among those below is included in the normal equipment of every liferaft ?
one boat-hook
one searchlight which can work continuously for not less than 3 hours
an efficient radar reflector (or radar transponder)
two painters of a length equal to not less than the distance from the stowage position of the liferaft to the waterline
The Muster List shall show the duties assigned to members of the crew. Which of the following duties shall be included according to present regulations?
Preparation of immersion suits for passengers.
General preparation of life-saving appliances.
Operation of the vessel's propulsion system.
Preparation of survival crafts' Emergency Position Indicating Radio Beacons (EPIRRB).
*Which of following items shall be included in an abandon ship drill?
a mock search and rescue of passengers trapped in their staterooms
Checking passenger's immersion suits
Checking the lifeboat provisions and supplies
Checking the distress signal rockets and other distress signals
On a RoRo vessel, when loading Double Stacked containers on Maffi Trailers how many twist locks should have used between the 2 containers
three in total 2 at the door end 1 at the opposite end
One at each end 2 in total
One on every corner 4 in total
Why do we use stabilisers on passenger ships?
To decrease the rolling angle of the vessel
To adjust the trim of the vessel
To increase the intact stability
To decrease the dynamic stability
What would be a correct form of response to the question: What is the weather in your position?
The correct form of response would be: "The weather is fine"
The correct form of response would be: Wind northwesterly, force 5; visibility good; moderate sea and swell
The correct form of response would be: "The weather is satisfactory"
The correct form of response would be: "The weather is bad"
LNG is made up of a number of saturated hydrocarbons the greatest percentage of which is Methane. What are saturated hydrocarbons?
Saturated hydrocarbons contain atoms of hydrogen and carbon and also other elements such as chlorine.
Saturated hydrocarbons contain hydrogen and carbon atoms with single carbon to carbon bonds.
Saturated hydrocarbons are compounds of hydrogen and carbon which contain the maximum amount of water vapour.
Saturated hydrocarbons contain hydrogen and carbon atoms with double carbon to carbon bonds.
There are many applications in circuit theory where it is important to obtain the maximum possible power that a given source can deliver. This figure consists of a practical voltage source V(g) with internal resistance R(s). What resistance R(L) will maximize the power transmission from the source to R(L)?
R(L) = R(s)
R(L) = 2 R(s)
R(L) = 0.5 R(s)
R(L) = R(s) / sqrt (3)
At the design phase of a container ship, how is the loss of strength resulting from the large deck openings, compensated?
Large deck beams longitudinally and athwartships at the sides and ends of hatches
Additional transverse bulkheads
Large doubling plates at the hatch corners
Additional longitudinal bulkheads
In a PID controller it is possibile to change the setting of the Proportional band (P), the Reset time (I) and the Rate time (D). Please indicate which curve shows the typical response to a step input, if the variables are well adjusted.
Figure 4.
Figure 3.
Figure 2.
Figure 1.
What necessary precautions should be taken before entering a tank or an enclosed space?
Make sure that the tank/ enclosed space is gas free, ventilated and the oxygen content is measured. O2 content shall be 21% before entering the tank/ enclosed space
Bring a flashlight and put on safety shoes
Remember to have a colleague standing by to assist you if any problems
Use a breathing apparatus if the oxygen level is below 21%
Which group of containerised dangerous goods is considered the most hazardous for marine transportation, due to possible decomposition at normal temperatures?
Inflammable liquids
Organic peroxides
Infectious substances
Toxic gases
What kind of damage can ro-ro cargoes sustain when loaded above fuel tanks?
Tyre damages
Rusting of internal parts
All
Melting of internal plastic areas
When working in parts of the inert gas system such as the scrubber or deck water seal, what procedure must be followed?
Normal working practice.
Working with self contained breathing apparatus (SCBA).
Enclosed space entry.
Working aloft.
What is often done prior to loading grain in cargo holds which are sweating?
Portable fans are used to dry the holds
Steelwork within the holds is covered with kraft paper
Steelwork within the hold is covered with plastic
Grain dust is blown into all parts of the hold via the grain elevator
Why are duplex filters usually employed in the lubricating oil system of an auxiliary diesel engine?
Changing of the filter element can be carried out without interrupting engine operation.
The pressure drop is half that of a single filter unit.
Filter blockage will not occur.
It gives better filtration of the oil.
Cargo heaters are frequently used when discharging refrigerated LPG cargoes into pressurised shore tanks. What would be a typical "heating range" required from a heater for discharge of fully refrigerated propane?
From - 55 C to - 15 C.
From -25 C to +15 C.
From - 45 C to - 5 C.
From - 35 C to + 5 C.
What does MARVS mean on a cargo tank?
We mean maximum allowed relieve valve setting.
We mean minimum allowed relieve valve setting.
We mean maximum ROB of vapour.
We mean maximum recovery system.
What would it imply if at the discharge port cargo was found contaminated by a previous cargo?
That cargo interests will refuse to accept the cargo
That the vessel was unseaworthy when the voyage commenced
That the vessel will be arrested by cargo interests
That the vessel will be detained by port state control
What must be ensured at the commencement of cargo operations?
That the draught survey has been completed
That all fire dampers are closed
That all fire dampers are open
That CO2 gas lines to each cargo hold are clear
Maintenance of lifeboats and davit arrangements is routine work onboard. Why should you not carry out this type of work alone?
There might be a risk of falling even though harness and lifeline is used. A second person should always stand by to assist with tools etc. and other practical arrangements.
If you need something to drink, the second person can get it for you
It is boring to work alone and you should be able to chat with colleagues while working
If the person working on the lifeboat falls over board, the second person can lower the lifeboat and prepare pick-up immediately
The operation of a diesel engine is controlled by a mechanical-hydraulic, compensated speed sensing governor. How will the governor control be affected if the compensation needle valve is closed in and the engine load changes?
The governor will hunt resulting in erratic engine speed control.
Engine speed control will be sluggish.
A change in load will not affect a speed sensing governor.
Altering the compensation needle valve has no effect on speed control.
Many modern boiler burners operate with automatic modulating combustion control? Which of the following is necessary to ensure high efficiency and low emissions throughout the load range with this type of operating control?
Shortened furnace pre-purge sequence.
Operation on distillate fuels.
High turndown ratio for the burner.
Operation with an increased amount of excess air.
You are on a chemical tanker, where the duty officer usually controls the opertaion of the pumps and valves from a control room. You are in radio contact with him. The ship has just started to discharge several grades of chemicals to shore. Suddenly, the jettyman shouts across to you to "STOP". Which of the following will you do?
Inform the jettyman that you will check with the duty officer first.
It is important to keep the cargo discharge going, so you will ask the duty officer to slow the pumps to minimum speed while you find out what is happening.
Immediately repeat the request on the radio to the duty officer, then proceed to the manifold and stand-by for further instructions.
Ignore him, because you take your instructions only from the duty officer.
Who is responsible for ensuring that your ship’s security plan meets the requirements of the ISPS Code?
Recognized Security Organization
Flag State Administration
Company Security Officer
Ship Security Officer
During cargo tank gassing up and cooling down operations on an LNG carrier which of the given options, regarding temperature, needs to be observed?
Always control the vaporisers so that the temperature of methane vapour is lower than existing tank atmosphere temperature.
Never allow temperature of the insulation to fall below the safe minimum temperature.
Always control the outlet temperature of methane from the vaporiser.
Always control the temperature in the shore supply line.
Why is it necessary to cool down LNG cargo tanks slowly prior to loading cargo?
To minimise the risk of creating a vacuum in the tank.
To minimise thermal stresses in the cargo tank.
To prevent ice forming in the cargo tank.
To minimise thermal stresses in the hull.
When a new crewmember joins a ship for the first time, on-board training and instructions in the use of the ship's life-saving appliances, including survival craft equipment and in the use of the ship's fire extinguishing appliances shall be given as soon as possible. What is the maximum timeframe for completion of this training?
Maximum 1 week
Maximum 6 months
Maximum 2 months
Maximum 2 weeks
According to the specification for Oil Discharge Monitoring and Control Systems for oil tankers laid down by IMO, which of the following is the definition of an 'overboard discharge control'?
A system which receives automatic signals of oil content, flow rate, ship's speed, ship's position, date and time.
A system which monitors the discharge into the sea of oily ballast or other oil-contaminated water from the cargo tank areas.
A facility which prevents the initiation of the opening of the discharge valve or the operation of other equivalent arrangements before the monitoring system is fully operational.
A device which automatically initiates the sequence to stop the overboard discharge of the effluent in alarm conditions and prevents the discharge throughout the period the alarm prevails.
What is commonly recognised as the main hazard associated with unprotected entry into an enclosed space on a tanker?
There are no significant hazards associated with entry into enclosed spaces on tankers
A potentially oxygen deficient or toxic atmosphere
Restrictions on access and mobility within the space
Lack of adequate illumination for safe movement within the space
You are alongisde, port side to, about to commence loading several grades of chemicals. The Duty Officer instructs you over the walkie-talkie to proceed to the port manifold and open the valve to 4 port line. When you get there, there is no hose connected to that line. What will you do?
Take a look at the starboard manifold. There is a hose loop between 4 port and 4 starboard lines. Assume the Duty officer must have meant this side and open 4 port line on this manifold.
Open the valve to 4 port line as instructed.
Although there is no hose connected to 4 port line, there is one connected to 3 port line. Assume the Duty Officer must have meant this line and open this valve instead.
Report the situation back to the Duty Officer. Request clarification and confirmation of the instruction.
Following repair and refitting of the seawater pipe for the fresh water generator feed line the rating assisting with the work notices that one of the flange joints is leaking. What action should be taken by the rating?
Check the bolts are correctly tightened before informing the engineer so that the flange faces can be cleaned and re-jointed if necessary.
Shut off the water and apply silicon or other sealing compound to the outer edge of the flange joint.
Use a spanner with an extension pipe to try and stop the leak by tightening the flange bolts as much as possible.
Use a hammer and flogging spanner to try and stop the leak by tightening the flange bolts as much as possible.
For a low pressure boiler, after testing the water cloride level, it is found to be 500 PPM, what action would You take?
Do nothing.
Increase dosage.
Decrease dosage.
Blow down boiler and check condenser for leakage.
The range of a transducer is 0-200 bar. The output signal is 4-20 mA. What is the span of the output signal.
20 mA
4 mA
24 mA
16 mA
What is the purpose of "Glycol Water Heating"?
The system heats glycol water which is pumped around cofferdam system to maintain the temperature inside those spaces, when loaded, at approximately - 5 C.
The system heats glycol water which is pumped around cofferdam system to maintain the temperature inside those spaces, when loaded, at approximately +25 C.
The system heats glycol water which is pumped around cofferdam system to maintain the temperature inside those spaces, when loaded, at approximately +15 C.
The system heats glycol water which is pumped around cofferdam system to maintain the temperature inside those spaces, when loaded, at approximately +5 C.
Routine maintenance insulation testing of a three - phase induction motor should cover which measurements?
AA-E, ZZ-E
U1-U2, V1-V2, W1-W2, U-E, V-E,W-E
U-V-W-E
U-E, V-E, W-E, U-V,V-W, W-U
On the figure 4 possible definitions of the term "FORWARD" are given. Which one is the correct one?
Forward is given by B on the figure
Forward is given by C on the figure
Forward is given by A on the figure
Forward is given by D on the figure
What necessary precautions should be taken before entering a tank or an enclosed space?
Bring a flashlight and put on safety shoes
Make sure that the tank/ enclosed space is gas free, ventilated and the oxygen content is measured. O2 content shall be 21% before entering the tank/ enclosed space
Remember to have a colleague standing by to assist you if any problems
Use a breathing apparatus if the oxygen level is below 21%
Why should elevators not be used in an emergency?
Too few people can be moved in an elevator.
The elevator is reserved for people with special needs.
Power could fail and passengers could be trapped inside.
Engineering will shut down the ship's power and the elevator will be useless.
Which of the following is the purpose behind holding a pre-cargo transfer meeting before discharging a number of chemical grades?
To enable the master to confirm that ship's personnel have been advised of the cargo operation requirements on the Vessel Particular Questionnaire mailed to the ship's agent prior to arrival in port.
To ensure that all personnel involved are aware of the details of the proposed cargo operation, the services required and the safety considerations.
To establish tank readiness and the status of any other pre-operation preparations in order for the master to be able to confirm a time of arrival.
To ensure that the responsibility for all items on the Ship/Shore Safety Checklist is assigned and understood before the vessel arrives alongside.
You are in charge of discharging and crude oil washing. What is the maximum allowed oxygen level measured in the middle of the ullage space in a tank during crude oil washing? (IMO Reg)
10%
8%
3%
5%
The cargo tank pressure reading for a refrigerated cargo of propane is higher than the saturated vapour pressure for the cargo temperature. e.g. an absolute pressure of 1.5 bar at minus 43 degrees C. If the cargo tank had been cleaned before loading the cargo what is the likely cause of this condition?
The cargo tank insulation is damaged.
Some inert gas or nitrogen remained in the tank after gassing up.
The cargo has been loaded too quickly.
There is too much cargo vapour in the tank.
Where on a ship is the deck known as the "Boat Deck"?
The Boat Deck is the name of the main deck of the ship or boat.
The Boat Deck is the deck where access would be made from any boats alongside.
The Boat Deck is the deck from which persons embark into the lifeboats
The Boat Deck is the deck of a life boat
Despite setting what appears to be the correct delivery air temperatures in accordance with shipper's instructions, large cargo loss claims can still occur when operating reefer vessels. Which of the options given is likely to help avoid the majority of these large claims?
By confirming that the shipper is supplying to a market that works in Fahrenheit or Celsius.
By confirming that the vessel plant is calibrated in the same temperature scale that the shipper is quoting.
By confirming the whether the shipper is referring to the delivery air or pulp temperature of the cargo.
By confirming the temperature scale that the shipper is using in his carriage instructions, Fahrenheit or Celsius.
With reference to diesel engine ancillary system operation, which one of the given statements is true?
The normal jacket water temperature before the jacket water cooler is approximately 80 to 90 C.
The normal temperature of the lubricating oil before the lub oil cooler is approximately 80 to 90 C.
The normal scavenge air temperature after the charge air cooler is approximately 80 to 90 C.
The normal temperature of heavy fuel oil after the fuel oil heater is approximately 80 to 90 C.
Why is it dangerous to load wet Scrap Steel in containers?
Because of the huge increase in the weight of the cargo
Because the cargo will corrode the container
Because the cargo can spontaneously ignite
Because the cargo will not dry out en route
Which of the function shown is this operational amplifier circuit performing?
Differentiator
Inverting amplifier
Integrator
Non-inverting amplifier
Why is it important to remove all traces of salt after washing the cargo holds of a bulk carrier?
Because salt will contaminate the next bulk cargo
If not done, surveyors at the load port will be unable to properly inspect the cargo holds
Because salt encourages the corrosion of steelwork
To prepare the steelwork for painting during the ballast passage
What is the main effect on lubricating oil of operating for long periods at excessively high temperature?
It will change the flashpoint of the oil.
It will cause the oil to oxidise, reducing the viscosity.
It will cause the oil to oxidise, increasing the viscosity.
It will cause the oil to evaporate, increasing consumption.
When is sector search most effective?
Position of the search object is accurately known
When a datum marker can be used as a reference
When the search pattern radius is larger than 20 NM
Position of the search object is not accurately known
There are a number of standard reliquefaction plants commonly fitted onboard LPG and other liquefied gas carriers. What type of reliquefaction plant is required for a cargo of Ethylene Oxide?
Two-stage direct cycle.
Cascade direct cycle.
Indirect cycle.
Single-stage direct cycle.
LNG carriers are usually designated as Type 2G vessels according to the IMO IGC code. In relation to the 'Ship's Survival Capability' what is the level of preventative measure for cargo escape required for this type of vessel according to the Code?
Maximum preventative measures.
Minimum preventative measures
Moderate preventative measures.
Significant preventative measures
To which of the following are the Hague-Visby rules applicable?
Carriage of animals/livestock
Charter parties incorporating a Clause Paramount
Cargoes stated as being carried on deck
Contracts of carriage not evidenced by a bill of lading
Refrigerated cargoes are generally easy to secure for a sea passage when compared to some bulk, timber and project type cargoes. The cargo must be stowed so that it will not shift during the voyage and so that a good air flow can be maintained through the cargo. Which one of the given options is most likely to result in this required outcome and a successful carriage?
A loose uniform stow.
A tight uniform stow but with vertical gaps in the cargo for air flow.
The stow is unimportant as it is only the temperature in the hold which determines whether or not the cargo is carried successfully.
A tight uniform stow which forces air through the cargo.
A temperature control system is exhibiting hysteresis. Checks on all of the system components show that they are functioning correctly. Which of the changes/modifications given in the options is most likely to correct this problem?
Fit a valve positioner to the system.
Fit a new temperature sensor with a narrower temperature range.
Increase the pressure of the air supply to the controller.
Slacken off the control valve gland.
What would be a typical value for the set point for shut down of a large 2-stroke diesel engine due to thrust bearing high temperature?
125° C
85° C
65° C
105° C
Assign men to search men and women to search women unless a device such as a metal detector is used.
FALSE
.
TRUE
A seawater pipe is holed due to corrosion causing frequent bilge alarms. Which of the given temporary repair methods would be the preferred option to remedy the problem until the pipe can be replaced?
Cover all of the affected area with fibre glass tape and resin/fibre glass mixture.
Drive a steel taper pin into the hole to seal it.
Cover the hole with rubber insertion held in place with a jubilee clip.
Wrap duct tape around the pipe in way of the hole.
What are the immediate duties of the bridge Officer of the Watch when the ship suddenly runs into a fog bank?
Commence sounding the fog signal and reduce speed to Slow Ahead
Commence sounding the fog signal and call the Master and wait for him to arrive before taking any further actions
Commence sounding the fog signal and if the radar indicates no echoes in the vicinity, proceed at the normal speed until ships are detected on the radar or until the fog lifts
Commence sounding the fog signal, engines on standby, call the Master and lookout, if not already on duty
On a traditional crude oil carrier, it is possible to arrange the valves in the bottom of a pumproom so that cargo flows from one bottom line to another. When more than one grade of cargo is carried, what is the operational safeguard requirement regarding these valves?
That two valves must be closed on each line or a 'spacer' removed to ensure no direct connection between tanks.
That there is two valve segregation.
That one valve segregation is maintained at all times.
There is no so special requirement.
How is the condenser in a fresh water evaporator normally cooled?
With air
With seawater
With brine
With distillate
You are alongside, port side to, about to commence loading several grades of chemicals. The Duty Officer instructs you over the walkie-talkie to proceed to the port manifold and open the valve to 4 port line. When you get there, there is no hose connected to that line. What will you do?
Open the valve to 4 port line as instructed.
Report the situation back to the Duty Officer. Request clarification and confirmation of the instruction.
Take a look at the starboard manifold. There is a hose loop between 4 port and 4 starboard lines. Assume the Duty officer must have meant this side and open 4 port line on this manifold.
Although there is no hose connected to 4 port line, there is one connected to 3 port line. Assume the Duty Officer must have meant this line and open this valve instead.
What is the normal slow down/shutdown temperature for the jacket cooling water outlet from a diesel engine cylinder?
105 - 108° C
75 - 78° C
85 - 88° C
95 - 98° C
What name is given to the oriental cooking pan, with a small base and wide sloping sides, commonly used for "stir-fry" dishes?
Gok.
Wok.
Wack.
Wot.
What is the main purpose of bottom-blowing a boiler?
To check that we do not have any leak of smoke and gases in the combustion camber.
To control that water is present in the water chamber, when the boiler is in active operation.
To adjust steam pressure when the burner capacity is excessive.
To get rid of sludge in the water chamber.
When testing a overhauled fuel valve, the test pump is to be operated as follows:
Pushed slowly and use the finger tip to detect the accurately correct opening pressure.
Pushed gradually so the opening point can easily be detected.
Pushed by sufficient force to accurately check the correct adjusting pressure.
Of no importance.
If abnormal vibration occurs, what will You do?
Stop the purifier immediately, and make sure the oil is being feed to the bowl.
Reduce the feed oil.
Open more feed oil.
Close for the feed oil.
The engine RPM drops because of:
Faulty governor.
High temperature in the turbocharger.
Leakage in an inlet valve.
Leakage in an exhaust valve.
When an evaporator is operated in extremely cold water you may need to throttle the seawater supply to:
Prevent the evaporator from cold shocking
Maintain the specified boiling temperature
Increase the evaporator distilling rate
Avoid flooding the evaporator shell
Quality of the feed water in a steam plant changes during operation. Caused by this, the water is regularly tested. Which of the below statements describes the chemical mechanisms normally occuring?
Generation of sulphur acid causes the water quality to drift towards sweet and rise the pH - number.
Generation of carbonic acid causes the water quality to drift towards sour and lower the pH - number.
Water is becoming sligthly less conductive and does not transfer heat.
All of the mentioned alternatives.
What is an effective means of measuring total dissolved solids in boiler water?
Conductivity test.
Not possible to test solids in boiler water.
Alkalinity test.
Chloride test.
Даний онлайн-тест складається з 90 випадкових питань із тестів CES 5.1 з обраної вами тематики.