Home Online tests CES Passenger Deck Support Test online CES 5.1 for Deck department, Support level, Passenger vessel

Online testing: Test online CES 5.1 for Deck department, Support level, Passenger vessel

Select the test mode:

Education

Walkthrough mode

Online test

Description

The test consists of random questions on a selected topic.

Question 1 from 90

If a fire starts in the fuel tanks of a vessel, the fire will be …

a class A fire

a class E fire

a class B fire

a class D fire

Answer

On a cargo ship, where should we find the hydrants ?

At such locations that no part of the ship normally accessible to the crew while the ship is being navigating is located more than 20 meters away from a hydrant

At such locations that at least two jets not emanating from the same hydrant may reach any part of the ship normally accessible to the crew while the ship is being navigating, each of these jets coming from a single length of hose.

At such locations that no part of the ship normally accessible to the crew while the ship is being navigating is located more than 40 meters away from a hydrant

At such locations that at least two jets not emanating from the same hydrant may reach any part of the ship normally accessible to the crew while the ship is being navigating, one of these jets coming from a single length of hose (the other jet may come from a connection of several lengths of hoses)

Where would you find out which fire sections are enclosed by "A" or "B" class divisions on a ship?

On the capacity plan

On the general arrangement plan

All the mentioned alternatives

On the Ship's fire control plans

Regular ‘updating’ of a vessel’s position in an Inmarsat-C installation is among other things of importance:

to exclusively receive MSI-reports meant for the NAVAREA where the vessel is

because the Inmarsat organisation, in connection with the good reception of MSI-reports, makes it……

because MSI-reports for own vessel can't be received otherwise

Don't know

A DSC ‘distress alert’ message received contains the information: “GROUNDING”.This means that :

Don't know

For a good connection aerial transmitting has to be earthed

A vessel is aground

For a good connection transmitting receiving has to be earthed

The Urgency Message from a ship is used to notify other traffic of a situation where the ship is not in imminent danger, but where the development of the situation is uncertain and may need assistance in the near future. What is the telephony urgency message like?

RESCUE-RESCUE

SECURITE

PAN-PAN

MAYDAY

In relation ot OPA 90, Which of the following statement is correct?

COTP-zones may have additional rules and regulations

OPA-90 specify all oil cargo related rules and regulations

OPA-90 specify rules and regulations for all COTP-zones

After implementation of OPA-90 there are no area specific rules and regulations

Shock is a manifestation of changes in which the circulation fails because either pressure or volume of circulating blood has fallen to a dangerous level. What is the skin colour of a patient in shock?

Dark blue.

Light blue.

Pale or grey.

Green or purple.

What should be observed concerning the vessel's stress?

The vessel's draft and trim?

Distribution of the containers?

Distribution and weight of the containers?

Weight of the containers?

You are sailing in shallow water with 15% Under Keel Clearance. Coming full astern from full ahead, how will your changed course compare to deep water?

Large change at first, then changing slightly

The heading will most likely change by a large amount

The heading will not change at all

The heading will change only slightly

To get the best possible efficiency from refrigerator evaporators, the superheat should be regulated to?

0- 1 Degr. C.

40 - 50 Degr. C.

5 - 10 Degr. C.

25 - 30 Degr. C.

Does OPA90 apply to vessels engaged in carrying liquefied gas?

Only if the carrier carry HC-products.

OPA90 apply to all ships.

OPA90 apply only to oil tankers.

OPA90 apply only to non-American flag vessel.

LPG and other liquefied gases are often transported by sea on fully refrigerated gas carriers. What is the generally accepted definition of a fully refrigerated gas carrier?

Any gas carrier designed to carry liquefied gases and is fitted with a cooling plant.

A gas carrier, fitted with a reliquefaction plant, and designed to carry liquefied gases at the boiling temperature and at pressures slightly above atmospheric.

A gas carrier designed to load and carry liquefied gases at boiling temperature and at pressures slightly above atmospheric. No cooling plant is necessary as the cargo is loaded fully refrigerated.

Any gas carrier designed to carry pre-cooled liquefied gases in thermally insulated cargo tanks.

Is membrane tanks designed for carrying of ambient liquefied gases?

Yes if the vessel have cargo cooling plant

No, membrane tanks is normally designed for transport of fully refrigerated cargoes

Yes if the membrane tank is designed for high pressure

Yes if the membrane is more than 50mm thick

Which of the following fluids usually has the lowest density at normal ambient temperatures?

Marine diesel oil.

Heavy fuel oil.

Lubricating oil.

Sea water.

What is the purpose of a "part flow display system" installed on some oil tankers ?

The Part Flow System makes it possible to observe the discharge visually for oil content, even in darkness

The Part Flow System makes it possible to discharge dirty ballast below the water line on older tankers

The Part Flow System makes it possible to measure the oil content, even if the Oil Discharge Monitoring Equipment is not working

The Part Flow System makes it possible to observe the discharge visually for oil content, on older tankers with discharge below the waterline

You are to carry a cargo of Phenol across the North Atlantic in winter time. What precaution will you take with the double bottom tank located under the cargo tank containing the Phenol?

It is not necessary to take any additional precautions with the double bottom tank because it is part of an entirely separate pumping system.

It should be continuously vented to avoid the build up of condensation on the structure around the product.

It should be empty, to avoid cold water contacted the structure around the product because Phenol has a relatively high melting point.

It should be inerted, because Phenol has a very low Flash Point.

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?

To provide a reference point, and so ensure accuracy of any test results.

To ensure that the equipment does not overheat due to currents circulating through earth (ground).

To ensure that no energy remains in the system and that it cannot be recharged by external influences.

To ensure that it is dead, even if there was a flaw in the isolation procedure.

Where is the "PORT QUARTER", in the figure?

The Port quarter is A, in the figure

The Port quarter is C, in the figure

The Port quarter is B, in the figure

The Port quarter is D, in the figure

Ballast introduced into a cargo tank on a chemical tanker which has been washed to such an extent that the ballast contains less than 1 ppm of the substance previously carried may be discharged into the sea without regard to the discharge rate, ship's speed and discharge outlet location, but under certain conditions. What are those conditions?

That the vessel is not less than 50 miles from the nearest land and is proceeding on route.

Provided the ship is underway and a sample of the ballast water has been drawn from the tank and is stored on board, there are no additional conditions to be imposed on such a discharge.

That the discharge is passed through the Oil Discharge Monitoring Equipment and a visual watch is maintained on the vessel's wake.

That the vessel is not less than 12 miles from the nearest land and is in water that is not less than 25 metres deep.

What signal may be given by sound and by light to indicate that a vessel fails to understand the intentions or actions of another vessel, or is in doubt that sufficient action is being taken by the other to avoid collision?

Five prolonged blasts (flashes).

Three short and rapid blasts (flashes).

One prolonged blast (flash), followed by five or more short and rapid blasts (flashes)

Five short and rapid blasts (flashes).

Anyone of the crew who is assigned to watch duties in port has a number of important tasks to carry out. Which one of the listed tasks should be included in the watchman's duties?

Check the number of persons joining and leaving the vessel.

Check the safe and secure handling of cargo.

Check the moorings for correct tightness and ensure the gangway remains safe and secure.

Check there is always a shore watchman on the jetty.

What is important to prepare prior to a helicopter operation?

To stop the vessel completely

Make sure all loose deck equipment at helicopter deck is stowed away and secured.

To increase the speed of the vessel

To light up the area for pick-up

What is the purpose of having deep tanks on a general cargo ships?

Primarily for ballasting and to aid the stability when loaded, but may be used for liquid cargo

To raise the centre of gravity of the ship and make it a smaller GM and reduce the rolling period

To carry bulk grain

To hold solid ballast

What type of Bill of Lading covers "door to door" shipment?

A Destination Bill of Lading.

A Through Bill of Lading.

A Multi-Phase Bill of Lading.

An Ocean Bill of Lading.

Semi-pressurised liquefied gas carriers are often fitted with direct, single stage reliquefaction plants for cooling the cargo and dealing with boil off vapours. What cooling medium is usually used in the condenser to condense the cargo vapours for this type of system?

Fresh water.

Sea water.

Refrigerant gas.

Air.

he instrument most widely used for testing of semiconductor diodes is

Ammeter

Ohmmeter

Oscilloscope

Voltmeter

You have just started to load Dicyclopentadiene to 5 port and starboard cargo tanks, but no cargo seems to be coming into the tanks. What will you do?

Stop cargo - notify the Duty Officer and / or the terminal dependng on the agreed communication procedure. Re-check the lines, valves and connections carefully, bearing in mind that there might be a build-up of pressure. Advise as appropriate.

Open the main lid on the tank and use a flashlight to try and see if there is a problem with the pump or line inside.

Carefully slack the bolts back on the connections, working initially on the off-shore mainifold, to determine how far the pressure extends in the ship's pipeline system, to determine which valve is giving the problem.

Re-check all valves. Just say nothing and open it, if one is found closed.

How should wooden chopping boards be arranged after washing?

They should be placed in an oven set on a low heat, to dry them as quickly as possible.

They should be quickly wiped with a cloth and then stacked on top of one another.

Wooden chopping boards should not be washed; they should only ever be scraped and wiped with a dry cloth.

They should be placed vertically in a drying rack, in such a way that air circulates over all surfaces during drying.

How many separate means of escape from passengers and crew spaces should it be in each zone?

One

Two

Three

Four

How is the size of a reefer vessel normally referenced?

By the Suez Canal tonnage.

By the cubic foot capacity.

By the pallet capacity.

By the grain capacity.

On a General Cargo Vessel, which of the following statements are correct?

Under the Hague-Visby rules there is an obligation to make a vessel seaworthy

Under the Hague rules there is an obligation to make a vessel seaworthy

Under the Hague and Hague-Visby rules a ship-owner must exercise due diligence to make a vessel seaworthy

Under the Hague and Hague-Visby rules a vessel must be seaworthy at the commencement of a voyage

How is the painter released from the lifeboat, once the boat is waterborne and ready to leave?

Cut it with the axe provided

Remove the toggle which will release the painter

The painter will automatically part by the weak link when the boat goes astern to clear the ship

Cut it with the knife contained in the equipment locker

Which of the following detectors will you choose for detecting smoke from fire?

Thermocouple

Thermometer

Strain gauge

Ionization type

During an unmanned period on a UMS vessel the "low water level" alarm for the jacket cooling water system expansion tank activates. What action would you take as duty engineer?

Answer the alarm and adjust the alarm set point for the water level in the expansion tank before resuming unmanned operation.

Answer the alarm then block the alarm function for later action and resume unmanned operation.

Answer the alarm then block the alarm and change to manned engineroom condition.

Answer the alarm, top up the tank and check the system for leakage before resuming unmanned operation.

A threaded hole is to be formed in a steel plate using a tap and wrench. When drilling the hole which of the options best describes the required drill size?

The drill should be a bigger size than the diameter of the tap.

The drill should be a smaller size than the diameter of the tap.

The drill should be the same size as the diameter of the tap.

The drill should be the same size at the diameter of the bolt that is to be fitted into the hole.

During bilge pumping operations the pump suction gauge indicates a high vacuum. What is the most likely cause of the high vacuum reading?

Leaking pump gland.

A glogged bilge strainer.

A hole in the suction line.

Broken suction gauge.

Which symptoms would indicate piston blow-by when operating a 4 stroke trunk piston type engine ?

Increased pressure in the air inlet manifold.

Increased pressure in the crankcase and smoke at the crankcase vent.

Smoke and sparks from the scavenge manifold drains..

Increased temperature in the inlet air manifold on the engine.

A spare cylinder head for the generator needs to be lifted from its storage cradle to the generator flat. Because of its location the engine room crane cannot be positioned directly above it. What method should be used to bring the cylinder head into position?

Attach the crane hook to the lifting gear for the cylinder head and drag it across the deck until it is directly under the crane.

Use crow bars to lever the cylinder cover across the deck until it is in position below the crane.

Use a block and tackle to drag the head across to a position beneath the crane.

Rig chain blocks to lift the cylinder head from its cradle and then transfer it gradually over to the crane hook by working the chain blocks.

During the anchoring procedure, what would the Chief Officer understand by the following request from the bridge, "Which way is it leading"?

The Master is requesting the Chief Officer to inform the bridge of whether he can determine which way the ship is moving in the water.

The Master is asking the Chief Officer whether the ship needs to be moved forward and take the weight off the anchor cable.

The bridge would like to know the direction of the anchor cable from the hawse pipe.

The Master is asking the Chief Officer whether the vessel is dragging anchor

In the context of oil tanker operations, what is "clingage"?

Oil residues remaining in the bottom of a cargo tank after tank-cleaning

The resistance to flow in a pipeline during the discharge of an oil cargo

Electrostatically charged bubbles of air and moisture suspended in an oil cargo after loading

Residues remaining on the inside of a pipeline, or on the internal structure of a cargo tank after an oil cargo has been discharged

In the figure is shown the direction of possible mooring lines from the stern of a vessel, when moored port side alongside a jetty. Which letter shows the direction which would be used by a "STERN LINE"?

The Stern Line is indicated by D, in the figure

The Stern Line is indicated by A, in the figure

The Stern Line is indicated by C, in the figure

The Stern Line is indicated by B, in the figure

Your vessel has a controllable pitch propeller. The engine can be started when the propeller pitch is:

25 % ahead

10 % ahead

25 % astern

Zero

Which of the following should be available alongside the hand-washing facilities in the galley?

A bacterial liquid soap dispenser.

A mirror.

A light with a waterproof switch or pull chord.

A re-usable cotton towel on a rack.

Which of the following letter combinations represents a flow indicating controller on a process and instrumentation diagram

FIC

LIR

FLO

FIR

What do Tonnes per Centimeter immersion (TPC), Moment to Change Trim by one Centimeter (MCTC) and Longitudinal Centre of Floatation (LCF) have in common?

They vary with changes in displacement

They vary with small angles of heel

They vary with changes in the shape of the waterplane

They remain unaffected by changes in displacement

What is the purpose of the Ship Security Plan?

Outline the organizational structure for the ship.

Protect your ship from risks posed by security threats or incidents.

Outline specific measures for your ship to move from security level 1 to 2 and from 2 to 3.

Detail the duties of shipboard personnel assigned security responsibilities.

Why are cargo hold bilges washed with chloride of lime?

To assist with draining the bilges

To disinfect the bilges and remove odours

To assist with drying the bilges

To protect against corrosion

What is the purpose of a hatch cover ventilator grill on a General Cargo vessel?

To act as a strength member inside the ventilation shaft

To prevent the ventilator fans from damage

To prevent moisture from entering the hold

To prevent sparks entering the cargo hold

By what practical means can the upper reaches of a bulk carrier’s hold be inspected?

Standing on the Australian ladder’s upper platform

Using a deck crane

By erecting scaffolding

Using a cherrypicker

During inspection of the crankshaft of a medium speed diesel engine cracks are discovered at one of the main journal pins. The cracks originate from one of the oil holes and are progressing along the pin at approximately 45 degrees to the axis. From the options given select the most likely failure mode that would cause this.

Torsional fatigue due to excessive torsional vibration in the crankshaft.

Shear due to excessive loading of the crankshaft.

Fatigue due to repeated excessive bending of the crankshaft.

Erosion due to excessive oil flow through the oil hole in the crankshaft pin.

Why are a greater number of lashings required to secure cargo forward on deck compared with amidships under deck of a General Cargo Vessel?

Because the dynamic stresses on the lashing are much greater

Because the roll period is greater forward

Because heavier cargo is stowed forward

Because the dynamic stresses on the lashing are much less

Modern large slow speed diesel engines operate with very efficient turbochargers. This has resulted in much later opening of the exhaust valve as less energy is needed to drive the turbocharger giving exhaust timing which is almost symmetrical about bottom dead centre. How has this affected the reversing operation of the engines?

It has no effect and the reversing requirements of the engine are still the same.

Only the air start distributor has to be repositioned prior to reversing the engine.

The engine can be reversed by simply repositioning the main camshaft.

Only the fuel and starting air timing needs to be changed to reverse the engine.

Which of the methods given in the options should be used to test a remote reading temperature gauge for the auxiliary boiler exhaust gas?

Check the resistance change in the sensor over a known temperature range against the resistance values in the product sheet.

Place the sensor in a test tank of oil fitted with a heater element and thermometer and check the temperature gauge at different temperatures.

Place the sensor in a test tank of water fitted with a heater element and thermometer and check the temperature gauge at different temperatures.

Fit a spare temperature gauge and see if the readings are the same.

On a Container vessel, what do the letters 'PP' mean within the IMDG Code?

Packaging

Pollutant

Marine Pollutant

Severe Marine Pollutant

In describing oil cargoes, what is "sour crude"?

A crude oil from West Africa

A petroleum product which reacts with water during tank-washing, leading to a distinctive odour about the tank deck

A crude oil cargo which has left substantial residues in the bottom of the tank after discharge

A term used to describe crude oil or products containing appreciable amounts of hydrogen sulphide and / or mercaptans

A walk-in refrigerator has been out of use for several weeks and needs cleaning. It has been closed for a long time because there is a suspicion that there may be a small gas leak from the cooling system. What should you do?

Hold your breath as you enter, locate the gas leak and stick a bit of tape over it.

Seek advice from ther ship's safety officer who will perform a risk assessment and advise on any precautions necessary.

Nothing special - it's only a refrigerator and everything will be OK.

Get someone to come inside the refrigerator with you.

What causes deterioration of a hatch cover hydraulic system?

Extremes of weather

Repeated hatch cover operations

Ice accretion on piston jackets

Dust and cargo particles around the piston seals

You are at anchor and another chemical tanker is alongside to receive several parcels from your vessel. As you are not alongside, or actually in port, do you have to observe any of the usual precautions on deck?

No, when outside port limits, there are no requirements to observe any precautions.

No, the other ship is the receiving vessel, so the responsibility lies completely with her crew.

It is only necessary to observe precautions on deck if the agent or any other personnel from shore are on board.

Yes, there is no difference to a transfer operation whether it is alongside or with another ship at anchor.

Which type of material is normally used in the construction of a cargo tank designed for transporting LPG at atmospheric pressure?

Stainless steel.

Aluminium.

9% Nickel steel.

Carbon-Manganese steel.

Why are zinc anodes sometimes fitted to heat exchangers in seawater cooling systems?

To prevent fouling of the system.

To prevent scale formation in the system.

To prevent marine growth in the system.

To prevent corrosion of the metals used in the system.

Shortly after entering the cargo hold of a General Cargo ship to discharge logs, two dockers are seen to collapse; what is the immediate action to be taken by the OOW ?

Assume injuries are due to illness; stevedore and docker foreman to deal with situation

Enter space immediately to administer first aid

Sound general alarm, call emergency services ashore and prepare rescue team with self-contained breathing apparatus

Muster emergency rescue team and prepare to rescue casualties

A general cargo is loaded in Brazil on a General Cargo Vessel bound for Europe in winter time; what are the ventilation requirements in the cargo spaces?

Ventilation would not usually be carried out as the vessel is moving from a cold area to a warmer area?

Ventilation would only be carried out just prior to discharge

Ventilation would be occasionally carried out as the vessel is moving from a cold area to a warmer area

Ventilation would normally be required as the vessel is moving from warm to colder areas

Why do bulk carriers need to carry oxygen analysis and gas detection equipment?

Because this equipment is required under SOLAS 74/88

Because it is required under MARPOL 73/78

Because of IMO regulations regarding Enclosed Space Entry

Because it is required under the International Labour Convention

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 following is associated with staphyloccocal food posining?

Uncooked fish that has been defrosted overnight in a refrigerator.

Food that is not kept properly hot (or cold) as required.

Raw salad leaves.

Unwaxed citrus fruit.

You have just finished loading a cargo of Methyl Isobutyl Kentone. What must happen before the shore hose can be disconnected?

The drip-tray must be half-filled with fresh water.

All possible cargo residues in the line must be drained or cleared and any pressure relieved. The manifold valve and shore valve must be confirmed as closed.

Any pressure remaining in the hose must be relieved by rapidly slacking off the bolts on the connecting flange.

Any cargo residues in the line must be drained to the drip-tray. The manifold valve on the ship must be open to allow maximum drainage and only closed after the hose has been removed.

You have just completed the discharge of a cargo of Lube Oil additive and are clearing the ship's lines to shore. What piece of equipment can be fitted between a drain cock and the air line to safely release any excess pressure before disconnecting the air line?

An expansion valve.

A reducer.

A quick-coupling.

A three-way valve.

Records relating to breaches of security and changes in security level must be secured against unauthorized access and available for review by contracting governments.

TRUE

FALSE

What is the purpose of Material Safety Data Sheets?

To provide all personnel including emergency personnel with procedures for handling or working with that substance in a safe manner

To provide personnel in deck- and engine department with procedures for handling or working with that substance in a safe manner

To provide the safety officer with procedures for handling or working with that substance in a safe manner

To determine if the substance is flammable or not

There are two basic types of turbocharging systems: constant pressure and pulse. The main difference between the two is in which of the following?

The arrangement of exhaust piping and exhaust gas receiver.

The casing of the turbocharger.

The arrangement of the scavenging air coolers.

The scavenging valves of the engine.

What is the main reason that LPG boil-off gas is unsuitable for use in the vessel's fuel supply?

LPG vapour is heavier than air at atmospheric conditions and represent a risk as they may accumulate in machinery spaces.

LPG vapour is too difficult to ignite.

Reliquefaction of LPG vapour is a simple process and is a cheaper option than burning the boil-off gas in the boiler.

LPG is too expensive to use as fuel.

What is the purpose of a draught survey on a bulk carrier?

To calculate the vessels lightship displacement

To calculate the vessels constant

To calculate shear forces at the bulkheads

To calculate the quantity of bulk cargo loaded or discharged

When loading coal on a Bulk Carrier, what should the ship be provided with?

Ramneck tape

Means for drawing cargo samples

A glass hydrometer

Means for measuring cargo temperatures

What would be the correct form of response to the question: What is the visibility in your position?

The correct form of response would be: Visibility is poor

The correct form of response would be: Visibility is okay

The correct form of response would be: Visibility in my position is two hundred meters

The correct form of response would be: Visibility is medium

What advantages do you see by conducting passenger muster’s. Drill’s are mandatory for international voyage’s.

The passengers get to know the way around the ship.

The Passengers get familiar with lifejacket and location of muster station

Giving the company a good image for the public, and the crew get training.

The passengers get familiar with emergency procedures, life jackets, musterstation. And the crew get training in growd handling.

What letter is represented by this flag and what is it's meaning when displayed by a vessel in port?

P - All persons should report on board as the vessel is about to proceed to sea.

P - I require a pilot.

W - All persons should report on board as the vessel is about to proceed to sea.

S - I am operating astern propulsion.

The successive stages of all cargo and ballast handling operations on an oil tanker must be recorded on board. What is the name of the book where these details are listed?

The Oil Record Book.

The ODME Record Book.

The MARPOL Record Book.

The Deck Operations Logbook.

Where is the "FORECASTLE", in the figure?

The Forecastle is D, in the figure

The Forecastle is B, in the figure

The Forecastle is C, in the figure

The Forecastle is A, in the figure

What are the main elements in a damage control plan?

Boundaries of the watertight compartments for decks and holds. Position of controls for opening and closing of watertight compartments. Arrangement for correction of list due to flooding.

Instructions and procedures for reporting damage to the Company

Arrangements for correction of list due to flooding within 15 minutes

A damage control plan is the same as an emergency plan

What extent of hatch cover spares should be available on board at all times?

Rubber packing and hatch cleat washers for one panel section

Specimen fittings shown in the hatch cover manufacturer’s manual

Rubber packing hatch cleat washers and glue for two panel sections

Rubber packing and hatch cleat washers for two panel sections

What would you do if you saw a person falling overboard?

If I saw a person falling overboard I would shout once, "Man overboard"

If I saw a person falling overboard I would run to the Bridge

If I saw a person falling overboard I would inform the Bosun

If I saw a person falling overboard I would shout repeatedly, "Man overboard"

The first step in completing an SSA is to:

Develop an onboard security survey checklist

"Identify the key shipboard operations, systems, areas and personnel that are critical to protect."

List the existing security measures.

Create a list of potential motives for security incidents against your ship.

How should the hook be released from a davit lowered liferaft?

Just prior to reaching the water, the lanyard should be pulled. This sets the hook which will automatically release once the raft is waterborne

Wait until the raft is waterborne, then pull the lanyard

Unscrew the shackle pin

Cut the weak link on the wire with the axe provided

The engine room is equipped with regular fire hoses and nozzles. What is important to observe when using water as an extinguisant in the engine room?

To reduce the negative effect of water in an engine room, the spraying function to be used.The spray function will also give the personnel operating the fire hose good shelter against heat.

All the mentioned alternatives.

Water has a clear limitation in fighting an oil fire.

Water may short circuit electrical installation and may be a threat to the personnel operating the firehose as well as to electrical equipment itself.

What is the meaning of this symbol ?