Головна Онлайн-тести CES Chemical tanker Deck Support Test online CES 5.1 for Deck department, Support level, Chemical tanker vessel

Онлайн-тестування: Test online CES 5.1 for Deck department, Support level, Chemical tanker vessel

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Тест складається із випадкових питань з обраної теми.

Питання 1 з 90

How is a radio-telex traffic list transmitted:

ARQ

SELFEC

FEC

Don't know

Can a nitrogen blanket be maintained on a cargo containing an inhibitor which is "oxygen dependent"?

No, if this is done the lifetime of the inhibitor will rapidly expire.

I don't know.

Yes, provided the blanket only reduces the oxygen content in the ullage space to a minimum of 8% oxygen, which will still be enough for the inhibitor to function properly.

You are on a vessel 10 nautical miles off the coast of Algerie, in the Mediterranean Sea. Are you allowed to dump food waste overboard?

Yes, all kind of food waste can be dumped overboard

Yes, the food waste can be dumped if it is ground so that the resulting particles can pass through a screen with 50 mm openings

No, food waste can not be dumped overboard

Yes, the food waste can be dumped if it is ground so that the resulting particles can pass through a screen with 25 mm openings

After the start of a man overboard manoeuvre, whom shall be informed?

Chief Officer

Electrician

Engine Room

Galley

The vessel is to anchor with Pilot onboard. Which of the suggested answers most accurately define the main duties of the Officer of the Watch on bridge?

Monitor the bridge equipment and keep the Master informed of all outputs

Assist the Master and pilot and monitor the ships position.

Follow Pilots orders and ensure the anchorage is carried out successfully

Follow the Master's orders at all times.

How will the ship behave if you have a "black out" in the situation illustrated?

The vessel will turn to starboard and the speed will slowly reduce.

The vessel will turn to port and the speed will reduce gradually

The wind will push the vessel sidewards, but the heading will not change

The vessel will continue on course and the speed will slowly reduce

The rudder is hard over when steaming at full ahead in shallow water. How much "lift force" remains when the engine is stopped?

About 10 %

About 50 %

There will be lift force remaining

About 80 %

If the OOW must leave the voyage plan, he should?

Inform the master

Check the new plan

No special action necessary

Make a note in the log book

What kind of safety equipment must be worn during mooring operations?

Safety helmet, safety shoes.

Boiler suit, working gloves.

All of the mentioned equipment.

Dress according to the climate.

Chemical tankers are built with either "gravity" or "pressure" type cargo tanks. A "gravity" tank is one having a design pressure at the top of the tank of:

0.1 bar?

2.7 bar?

1.7 bar?

0.7 bar?

What is the most likely reason for vibration and noise at the suction side of a centrifugal pump when it is running?

Pump suction valve fully open.

Water hammer in the pump casing.

Fluid friction in the suction line.

Collapsing vapour bubbles due to cavitation.

Which cell voltage is required to trickle charge a lead acid battery?

1.2 V

2.5 V

2.0 V

2.15 V

What is the approximately boiling point of LNG at atmospheric pressure?

Approximately -160 C.

Approximately -170 C.

Approximately -140 C.

Approximately -150 C.

What method should be used to discharge a semi-pressurised gas carrier if there is a break down on the cargo discharge pump?

By using the cargo compressor to pump the cargo vapour ashore as it boils off.

By using a portable submersible pump to empty the affected tank

By using the inert gas system to pressurise the cargo tank and force the liquid cargo ashore.

By pressurising the vapour space of the cargo tank using a vaporiser and cargo compressor to force liquid cargo ashore.

What type of lashing arrangement is needed on weather deck for securing one container high?

No lashing arrangement needed.

Turnbuckles and rods.

Twistlocks with turnbuckles and rods.

Twistlocks.

What is the purpose of the cylinder head safety valve?

To adjust the cylinder pressure to a safe working pressure.

To relieve excessive high pressure in the cylinder to protect the engine from being damaged.

A valve for safety stop (emergency) of the engine.

For indication of engine being overloaded.

Which electronic component is this graphical symbol illustrating:

Auto transformer

Potentiometer, 10 kilo-ohms

Variable inductive reactor

Variable electrical heater, 10 kilo-watts

What is the safe time for operating the crankcase door when oil mist alarm is activated and the engine has been stopped?

After 20 minutes

After 1 minute

After 10 minutes

After 5 minutes

When loading LNG into prismatic type cargo tanks it is sometimes prohibited to leave any of the tanks between 10 to 80% full at completion of loading. What is the main reason that it is recommended to avoid this prohibited partly filled range?

The free surface effect might result in excessive sloshing loads.

It will increase the rate at which boil off gas will be produced.

It would be an uneconomical use of cargo capacity.

It will increase the vapour space and therefore increase the risk of flammable mixtures developing.

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)

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.

Severe piston ring and liner wear are experienced in two cylinders of a medium speed diesel engine shortly after a complete overhaul of all of the cylinders of the engine. The engine is fitted throughout with chrome plated cylinder liners. Which of the given options is the most likely cause of the excessive wear in the two cylinders?

The oil control rings have been fitted upside down in the two cylinders.

Chrome plated piston rings have been mistakenly fitted to the two cylinders.

Cast iron piston rings have been mistakenly fitted to the two cylinders.

The running in period for the engine was too short.

In relation to exhaust gas measurement with a thermocouple, use of an amplifier which gives a mA-signal out is preferred. Why is this done?

This depends on the length of the compensation-cable.

The output signal from a thermocouple is at mV level,and can not be transferred over any long distance without loss of signal, giving a poor accuracy and poor noise immunity.

The signal out from the thermocouple is also mA, but have to be amplified in order to give a good signal to the alarm system.

To stabilize the signal andmake it easier to measure at the receiver.

What is the most important treatment concerning a foreign body in the eye?

Wring the eye-lid to prevent blinking

Local anaesthetic

Rinsing of the eye with water

Keep the eye closed

Why do rolled joints of meat carry a higher risk of bacterial infection?

Because rolled joints are normally purchased already prepared and the quality control of a shore supplier can not be guaranteed.

Because meat of a poorer quality is generally used in rolled joints.

Because any bacteria that were present on the outside surface of the meat will be transferred to the inside when the joint is rolled.

Because the temperature necessary to kill bacteria can never be reached in the middle of a rolled joint.

When lowering a RoRo Cargo Side or Stern Ramp what must be ensured ?

The ramp surface must be clean

The ramp must be lowered by the duty officer only

The vessel is securely moored and there is nothing beneath the ramp

To evaluate the condition of a heat exchanger the following measurements should be recorded:

Pressure drop

In and outlet temperatures, and flow rates for both media

In and outlet temperatures for both media

In and outlet temperatures on one media

Which of the following letter combinations represents a level indicating controller on a process and instrumentation diagramv

CIL

LIR

CIR

LIC

A conventional reefer vessel is fitted with hydraulically operated hatches in the 'tween decks. Complete the following statement from the options given. "Careful maintenance of the hydraulic system is important….

..to ensure that the lids can be opened fully and secured.

..to ensure that the hatch lids operate at the correct speed.

..to ensure that there are no oil leaks which may contaminate the cargo.

..to ensure that the planned maintenance system is up to date.

What is the correct definition of: -boat drill?

Training in lifeboat handling.

To drill all boats.

To secure the boats.

To launch the boats.

What would be the most likely cause of a smell of "rotten eggs" in the upper casing of the engine room?

Fresh water evaparator malfunction.

Open or leaking acetylene bottle.

A leak of exhaust gas from a boiler or diesel engine exhaust.

Failure of the ship's refrigeration system.

What are the characteristics of Seed Cake containing vegetable oil UN 1386 when carried in bulk?

May self-heat slowly and if wet ignite spontaneously

No specific hazards

This cargo may release carbon monoxide

This cargo is non-combustible and low fire risk

What does the Captain mean?

Set the engine to dead slow ahead, and change the course 10 degrees to port

There is a dead slow in front of the ship, 10 degrees to port

Set the engine to dead slow, and set the rudder angle at 10 degrees to port

There is a dead slow in port number 10

If the general alarm is sounding and evacuation of the ship is required. What is the best way to ensure that all passengers are aware of the situation?

Use Public Address system to inform the passengers. Inform all passengers to report to designated area for head count.

Crew with designated emergency duties should proceed to the muster station to count all passengers in his section. If somebody is missing, report to their superior.

Inform the passengers through Public Address system. Crew with designated emergency duties should proceed to their cabin section and search all cabins. Guide and evacuate passengers. If the area is inaccessible report to their superior or the bridge.

Alarm signal and Public Address system will be effectively, including head count at muster point.

Two identical medium speed engines are connected through clutches and a reduction gearbox to a single controllable pitch propeller. It is noted during normal operation that the load sharing between the engines is uneven with one engine taking a greater proportion of the load as the total load increases even though they are equally loaded at low load. Select from the options given the most likely cause of this problem.

One of the engines is running faster than the other at high loads.

The fuel filters in the supply line for one of the engines are blocked

The governor droop settings are incorrectly set and are not matched.

The clutch on one engine is slipping.

A standard convention for a 4 deck reefer vessel is to designate the decks A to D from upper to lower deck. Decks A and B common as are C and D with a gas tight seal between B and C. Apples are to be carried in decks C and D with bananas in A and B. Which of the options is the best to avoid the risk of crossover of temperature and respiration between the two cargoes?

Create a pressure differential with a higher pressure in decks A and B.

Create a pressure differential with a higher pressure in decks C and D.

Run the cargo fans intermittently in one of the spaces.

Operate the two spaces at equal pressures as the cargoes are compatible.

Which of the following is an oval-shaped, purple coloured vegetable, with white, spongy flesh, native to tropical Asia but popular today in Mediterranean cookery?

Asparagus (asperge)

Angelica (dang-gui)

Artichoke (carchofas)

Aubergine (brinjal)

What is the maximum stowage height for containers on deck of a General Cargo Vessel, if the vessel is not specifically designed for the carriage of containers?

The maximum height is two containers

There is no limit apart from point load limitations

The maximum height is one container

Containers must not be carried on deck

A ro-ro unit weighing 2mt is to be loaded in the fore and aft direction and lashed by belts of SWL 0.6mt. How many lashing belts should be used to secure the unit?

What is the depth of an iceberg below the surface of the sea?

The draught of an iceberg varies with the type of berg and its age.

The depth of an iceberg below the surface is always about one sixth of its total depth.

The draught of an iceberg is normally about 3/4 of its total depth.

The draught of an iceberg is about the same as the visible part of the iceberg above the water.

During maintenance work on a compensated mechanical hydraulic governor air is drawn in to the hydraulic circuit after draining and flushing out the unit. Which of the actions given in the options is most likely to assist in the removal of the air from the system?

With the governor in operation open the compensation needle valve to introduce instability and disturb the engine load to make the governor hunt.

With the governor in operation close the compensation needle valve and disturb the load to make the engine hunt.

Overfill the governor with fresh oil to force all of the air out.

Drain the governor again and slowly refill with fresh oil.

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

What is meant by the term "keeping a proper lookout" as applied to the bridge lookout?

Keeping a visual lookout all round the vessel

Continually visually scanning the horizon all round the ship

Keeping a visual lookout all round the ship and also actively listening out for audio signals

Keeping a very visual lookout ahead and abeam of the ship

What does the Chief Mate want the OS to do?

He wants the OS to turn the switch to start, just to be sure

He wants the OS to show him the switch identical to the one the 2nd Mate showed him

He wants the OS to show him where the switch that changes between automatic, manual, and emergency steering is

He wants the OS to show him how to handle the wheel

On a General Cargo Vessel, under what regulations would steel bands remaining in the cargo holds have to be discharged?

MARPOL 73/78 (Annex IV - Regulations for the prevention of pollution by sewage from ships)

MARPOL 73/78 (Annex V ? Regulations for the prevention of pollution by garbage from ships)

Flag state regulations

No specific regulations apply

What is the meaning of organic chemistry?

Organic chemistry is substances that contain hydrocarbons and oxygen.

Organic chemistry is substances that do not contain of hydrocarbons.

Organic chemistry is substances that contain hydrocarbons.

Organic chemistry is substances that contain of hydrocarbons, nitrogen and oxygen.

Why is a vessel entering dry dock normally slightly trimmed by stern?

To minimise the loss of stability.

To position the vessel easily over the blocks.

To allow drainage of water off the docks.

To allow better manoeuvring when entering into the dry-dock.

What danger is associated with damaged expanded metal gratings on loading ramps?

Vehicles’ windscreens may be damaged during cargo operations

The front and/or rear ends of vehicles may be damaged during cargo operations

Vehicles’ tyres may be damaged during cargo operations

The load density of the ramp will be affected

Measurement of oil cargoes is often achieved with a "UTI" device. What do the letters "UTI" stand for?

Uniform Tank Indicator.

Uncorrected Tank Innage.

Ullage Topping Instrument.

Ullage Temperature Interface.

When we are measuring temperature with a thermistor, the type of sensing device is:

Temp sensitive semi-conductor

Junction of two dissimilar metals

Capacitance probe

Platinium wire resistor

A combustible gas indicator of the catalytic filament type is used to check the atmosphere in an enclosed space onboard ship. When taking readings in a fuel tank which has been emptied for cleaning the meter reading initially rises and then falls back to zero. What is the likely defect, if any, in the instrument when this type of behaviour is displayed?

The sampling pump is faulty.

The filament has burnt out.

The batteries are flat.

The filament is contaminated due to too high a concentration of hydrocarbons.

Do we have to enter "internal transfer of cargo" in the Oil Record Book?

Only if case of overflow.

No.

Only if cargo contain H2S.

Yes.

What will the cadet find in the engine store?

He will find The Bosun in the engine store

He won't find anything in the engine store

He will find the port anchor winch in the engine store

He will find new brake bands in the engine store

The picture shows a liquid filled thermometer. Liquid filled thermometers and manometers are often installed onboard ships. What is the main purpose for the liquid filling of such pointer instruments?

Keep the rear side of the front glass clean

Avoid water penetration from outside

Reduce mechanical wear on the internal parts caused by vibration

Compensating for changes in ambient temperature

When plotting a position, where should the Officer of the Watch select as the ships position, when three gyro compass bearings intercept as a triangle (Cocked Hat) and not as a single point?

At the centre of the triangle

At the point furthest away from any danger.

At the point nearest the course line drawn on the chart

At the point nearest to the danger, if any.

What is the recommended method of identifying galley utensils, such as knives, chopping boards and containers, that are dedicated to the preparation of specific types of food?

All galley utensils can be used for the preparation of any foodstuffs, so there is no need to dedicate or identify them in any way.

By making only one person responsible for issuing all utensils and tools in the galley.

A standard colour coding system.

By storing them in individual drawers or lockers.

Maintenance of lifeboats and davit arrangements is routine work onboard. Why should you not carry out this type of work alone?

It is boring to work alone and you should be able to chat with colleagues while working

If you need something to drink, the second person can get it for you

If the person working on the lifeboat falls over board, the second person can lower the lifeboat and prepare pick-up immediately

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.

What is the meaning of TLV and what unit do we use on it?

TLV is the threshold limit value and the unit is ppm - parts per million.

TLV is the total level value and the unit is ppm - parts pr million.

TLV is the technical limit value and the unit is ppm - parts per million.

TLV is the threshold limit value and the unit is litre.

Where are you likely to find horizontal fractures on a bulk carrier?

Along the upper edges of hopper tank plating and the lower edges of topside tank plating

Along hatch coaming connections to the main deck

Along the tanktop plating

Along the lower edges of bulkhead stools

What would you do if you were told that cargo on a flatrack has a tendency to deform or to compact during the voyage?

Slacken the cargo securing gear

Reject the cargo

Ensure that the cargo is secured as per shipper’s instructions

Accept the cargo as it is and clause the mate’s receipt accordingly

When it is required that a mandatory prewash is to be witnessed, who is to make and sign the applicable entries in the Cargo Record Book?

The Master

A government-authorized surveyor.

What is the normal name given to the fuel oil used for the ship's main engines?

Fuel oil

Lubricating oil

Cargo

Bunkers

You are receiving stores, including some cartons of frozen seafood. You spot a watermark around a particular carton. What might this be a sign of?

That the produce has been allowed to partially thaw at some stage during trans-shipment

That the carton has been previously used to transport another product

That the fish inside the carton are oily

That the carton has been standing in the open air and mositure has been absorbed into the packaging

The Reid Vapour Pressure (RVP) test is a simple and commonly used method for measuring which of the following characteristics of an oil cargo?

The nominal vapour pressure of the liquid at 38.7 degrees C.

The actual vapour pressure of the liquid at 15.6 degrees C.

The uncorrected vapour pressure of the liquid at 59 degrees C.

The absolute vapour pressure of the liquid at 37.8 degrees C.

Personnel on board ro-ro passenger vessels must undergo training courses before they can be part of the safe manning and assigned to emergency duties on board. What is minimum training requirement for all personnel?

No Training Course is required as long as the personnel have relevant experience

Basic Safety Training Course and Company Specific Familiarisation Course

Basic Safety Training Course and Crowd & Crisis Management Training Course

Basic Safety Training Corse

A situation exists where a cargo of palletised fruit is being loaded to capacity on a conventional reefer vessel. In order to load all of the available cargo it is proposed to break down some of the pallets and place the loose cartons on top of the pallets; there is just enough space to accommodate this below the deckhead. From the options given which is the most suitable action to take?

Reject the plan as the extra handling will incur greater stevedoring costs.

Reject the plan as the charter is to carry only palletised cargo.

Reject the plan as the reduced gap at the top of the stow will restrict the return air flow.

Accept the plan in order to carry all of the cargo.

How often shall watertight doors in main transverse bulkheads which is in use at sea be operated (tested)?

Daily

Every month

Every two weeks

Weekly

The Threshold Limit Value (TLV) refers to as parts to million (PPM) by volume of gas in air. What does the time weighted average of ppm indicates?

The average of exposure to a toxic substance per day.

The maximum exposure to a toxic substance per 8 hours working day.

The maximum exposure to a toxic substance per day.

The average exposure to a toxic substance per 8 hours working day.

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

A main steam boiler is to be shut down for an extended period. Which of the following methods for the lay up is best suited to maintain the boiler in good order?

Lay the boiler up dry by just draining all of the water and closing all the access doors.

Lay the boiler up wet completely filled with clean distilled water with a slight head on the steam drum to avoid any air pockets.

Lay the boiler up dry by draining all of the water and fitting heaters in the drums to prevent condensation forming which may result in corrosion.

Lay the boiler up wet with normal working water level and chemical treatment maintained.

On a Container vessel, what is the function of a twistlock?

To secure manually operated hatch covers?

To secure timber cargo?

To secure winches from unintentional running?

To secure/lash containers?

What does a "compactor" do?

It compresses and forms raw meat into burgers, patties and other pre-formed shapes prior to packing and freezing.

It disposes of waste material through high-temperature combustion.

It crushes and compresses garbage, such as food packaging, into a more manageable shape and form prior to disposal.

It crushes and grinds food waste into small particles that can be washed overboard as "grey water".

Does OPA90 apply to vessels engaged in carrying liquefied gas?

OPA90 applies only to oil tankers.

OPA90 applies only to non-American flag vessels.

Only if the vessel carry HC-products.

OPA90 applies to all ships.

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.

You have just completed discharge of a cargo of Iso-Butanol and are preparing for tank cleaning. The pumpman is going round the deck checking the cargo pump cofferdams for any leakage of hydraulic oil or cargo. What term is applied to this procedure?

Proving.

Stripping.

Venting.

Purging.

A plate type heat exchanger in a central cooling system has seawater leaking around the edges of some of the titanium plates. After inspection and reassembly following the manufacturer's instructions the problem still exists. What action, from the options given, should be taken to rectify the problem?

Fit new gaskets to the each of the plates.

Keep tightening the plate stack until the leakage stops.

Reduce the pressure of the sea water.

Scrap the plates and replace with a new plate stack.

Read the text in the diagram and answer this question: What should be given to prospective seafarers?

Approved training in survival techniques

Passport and visa

Recommendations

Survival and protective clothing

On a Container vessel, with regard to raised deck sockets, what must be ensured prior to commencing cargo operations?

They must be clean and free of internal debris

They must be greased

They must be ready to secure the turnbuckles

They must be well painted

Cargo compressors are fitted on LPG carriers as part of the cargo and vapour handling system. Why is it important to 'bar over' a piston type LPG compressor before starting it up?

To prove the oil pump is working.

To avoid low suction pressure during start up.

To reduce the electrical start up load..

To make sure there is no liquid in the cylinders.

With regard to dry chemical powder fire-extinguishing systems in the cargo area, what is the required number of self-contained independent dry chemical powder units?

At least one unit.

At least three units.

Sufficient number of units to cover the cargo area.

At least two units.

What is the approximately efficiency of the ejector?

The ejector's efficiency is between 20% and 30%.

The ejector's efficiency is between 30% and 40%.

The ejector's efficiency is between 70% and 80%.

The ejector's efficiency is between 60% and 70%.

Which component does this graphical symbol illustrate?

Level switch for centre-tank

Local level controller with indicator

Low carbon incinerator

Remote level controller with indicator

Many large slow speed diesel engines operating on heavy fuel oil have a fuel injection system which features Variable Injection Timing. How does this affect engine operation?

VIT allows the ship's engineers to alter the injection timing for each load setting with a simple single adjustment of the fuel rack.

VIT increases engine efficiency by automatically maintaining the maximum cylinder pressure over the entire load range.

VIT increases engine efficiency by automatically maintaining the maximum cylinder pressure over part of the load range.

VIT improves engine operation by automatically controlling the start of fuel injection when it detects a poor quality fuel.

Many LNG vessels have spherical cargo tanks. Which of the statements given in the options is the most accurate?

Using spherical tanks means double hulls are not required.

Using spherical tanks means that the cargo can be carried at pressures well above atmospheric.

Using spherical tanks allows more cargo to be carried as the tank is positioned above the deck.

Using spherical tanks means only a partial secondary barrier is required.

With the set point at the actual desired value, a temperature control system is giving an unacceptably large offset (difference between set point and measured value) on high load resulting in a low system temperature. Which of the actions given in the options should be taken to reduce this effect and therefore achieve closer control of the temperature?

Increase the set point to a value above the actual desired value

Crack open the manual bypass valve for the control valve.

Increase the width of the proportional band for the controller.

Reduce the width of the proportional band for the controller.

Which of the options given is the main reason for using a ring spanner to tighten the brass nuts on the cover studs of a pump casing?

The nuts can be tightened more with this type of spanner.

It will allow the nuts to be tightened correctly.

It will minimise the risk of slipping off the nut or damaging the nuts.

It can be adjusted to the exact size of the nut.

Fuel oil from a leaking fuel pipe has been collected in a drip tray under the boiler furnace.The oil is suddenly ignited by a backflash from the boiler burner.The boiler room is manned and the person present has the choice of various extinguishers. The fire is purely a surface fire. What would be the preferable extinguisher?

CO2

Any of the mentioned alternatives

Water

Powder

In case of a fire inside the Acetylene-line in the ac/ox gas welding equipment, what action is deemed necessary?

Close Acetylene valve in the workshop.

Close Oxygen valve.

Close valves on Acetylene bottle(s).

Close the valves on both the Acetylene and the Oxygen bottles.

What kind of extinguishing-remedy would you choose to put out an electrical fire?

Dry extinguishing remedy.

Water

Combination of powder and water.

Foam.

What class of fire involves gas?

Class D fire

Class C fire

Class A fire

Class B fire

Даний онлайн-тест складається з 90 випадкових питань із тестів CES 5.1 з обраної вами тематики.