CHEMCO - Advanced Training for Chemical Tanker Cargo Operations Exit Exam Questions - Set 13

Question 1

Prior to entering a cargo pump room, you should ensure that

Accepted Answer

A: the forced ventilating system is operating

Answer

B: the cargo pumps are secured

Answer

C: no mono carbon gases are present

Answer

D: the oily water separator is de-energized

Question 2

The complete details of a crude oil washing system aboard your vessel, including the operating sequences and procedures, design characteristics, a description of the system, and required personnel will be found in the

Accepted Answer

B: Crude Oil Washing Operations and Equipment Manual

Answer

A: Oil Transfer Procedures Manual

Answer

C: Code of Federal Regulations

Answer

D: Crude Oil Washing addendum to the Certificate of Inspection

Question 3

You are testing a tank that contained gasoline by using a combustible gas indicator. Under testing, the tank sample caused the needle to move rapidly to 100 on the dial then fall to zero. What is the concentration of flammable gas?

Accepted Answer

C: Over the flammable range

Answer

A: Less than the flammable range

Answer

B: Within the flammable range

Answer

D: The explosimeter is defective and giving a false reading.

Question 4

Which of the following documents carried by a ship is not issued under the MARPOL convention?

Accepted Answer

D: Safety Management Certificate

Answer

A: IOPP certificate

Answer

B: Oil Record Book

Answer

C: SOPEP

Question 5

Which of the following conditions need NOT be satisfied while discharging oil or oil mixtures from ships into the sea?

Accepted Answer

B: The ship must be at a distance of 12 nautical miles from the nearest land

Answer

A: The ship must be proceeding en route

Answer

C: The oily mixture is processed through an oil filtering equipment as per Reg. 14 of Annex-1

Answer

D: The oil content of the effluent without dilution does not exceed 15 ppm

Question 6

Which tanker discharge pattern would be the safest and most efficient?

Accepted Answer

B: Start discharging with most of the discharge coming from forward, but include some from midships and after tanks

Answer

A: Empty the forward tanks and start working aft, emptying each tank in sequence

Answer

C: Start pumping from forward, midships, and aft with the discharge distributed equally among the tanks

Answer

D: Start pumping from midships and then work forward and aft simultaneously as the midships tank is emptied

Question 7

Ballast water exchange should be done:

Accepted Answer

C: at least 200 nautical miles from the nearest land and in waters at least 200 metres in depth.

Answer

A: at least 100 nautical miles from the nearest land and in waters at least 100 metres in depth.

Answer

B: at least 200 nautical miles from the nearest land and in waters at least 100 metres in depth.

Answer

D: at least 100 nautical miles from the nearest land and in waters at least 200 metres in depth.

Question 8

As per requirements of Marpol, Annex 1, all ships delivered on or after 1st Aug. 2010 with an aggregate oil fuel capacity 600 m3 and above, the oil fuel can be carried in

Accepted Answer

C: Deep tanks in protective locations

Answer

A: Any of the tanks without any restriction

Answer

B: Deep tanks and Double bottom tanks

Answer

D: Double bottom tanks not extending upto the ship's side

Question 9

The atmosphere in a tank is too rich when it is

Accepted Answer

D: incapable of supporting combustion because the hydrocarbon vapor content makes the atmosphere above the UFL (Upper Flammable Limit)

Answer

A: incapable of supporting combustion because the hydrocarbon vapor content

Answer

B: makes the atmosphere below the LFL (Lower Flammable Level) capable of supporting combustion

Answer

C: in a noncombustible state which can be relied on to occur naturally on a regular basis

Question 10

Reid vapor pressure is __________.

Accepted Answer

D: a measurement of the amount of flammable vapors given off by a liquid at a certain temperature

Answer

A: exerted by liquid cargo on the sides of a tank

Answer

B: exerted by liquid cargo on a cargo hose body

Answer

C: the lowest temperature and pressure that will cause a flammable liquid to give off vapors

Question 11

The fitting at the end of a cargo line in a tank that allows suction to be taken close to the bottom of a tank is a ___________.

Accepted Answer

C: bell-mouth

Answer

A: suction end

Answer

B: strainer

Answer

D: vacuum valve

Question 12

The use of sinking and dispersing chemical agents for removal of surface oil is

Accepted Answer

D: authorized only with prior approval

Answer

A: the most common method used

Answer

B: too expensive for common use

Answer

C: generally safe to sea life

Question 13

High level and overfill tank alarms are set:

Accepted Answer

B: to values as recommended by the manufacturer

Answer

A: as per the ships cargo system

Answer

C: to values depending on cargo type

Answer

D: to values as recommended by the ISGOTT guide

Question 14

The term "oil" as used in the Oil Pollution Regulations means

Accepted Answer

C: oil refuse

Answer

A: fuel oil

Answer

B: sludge

Answer

D: fan speed

Question 15

To allow for the rise or fall in tide and for change in draft of a tankship during cargo transfer, cargo hoses must be suspended with ____.

Accepted Answer

B: enough slack in their bight

Answer

A: slings or saddles placed at 25-foot (8 meter) intervals

Answer

C: topping lifts and runners tied off to winches

Question 16

You are planning to use a crude oil washing system. What precaution must be taken with the source tank for the washing machines?

Accepted Answer

A: At least one meter must be decanted from the source tank.

Answer

B: The oil in the source tank must be sampled for compatibility.

Answer

C: The source tank must have been crude oil washed at least once in the past 150 days.

Answer

D: The inert gas system must lower the oxygen content in the source tank to a maximum of 12%.

Question 17

As per definition of MARPOL Annex-1, a Crude oil tanker means a tanker designed to carry

Accepted Answer

C: Crude oil only

Answer

A: Crude oil and other dirty oils

Answer

B: Crude oil alongwith some refined products

Answer

D: Crude oil, but alternatively may carry at times dirty and clean oil products also

Question 18

The atmosphere in a tank is too lean if it is

Accepted Answer

A: incapable of supporting combustion because the hydrocarbon content is below the LFL (LowerFlammable Limit)

Answer

B: capable of supporting combustion because the hydrocarbon content is above the UFL (UpperFlammable Limit)

Answer

C: capable of supporting a fire once started

Answer

D: not safe for ballasting

Question 19

While testing a cargo tank, your oxygen indicator reads 25% oxygen in the tank. You would then

Accepted Answer

B: suspect the accuracy of the reading

Answer

A: enter the tank safely

Answer

C: ventilate the tank

Answer

D: test for nitrogen

Question 20

As per the definition of MARPOL, Annex-1, a combination carrier means a ship designed to carry

Accepted Answer

A: Crude oil and refined oil products at the same time in different tanks

Answer

B: Refined oil products and chemical products at the same time in different tanks

Answer

C: A combination of different products at the same time, sometimes also known as a parcel tanker

Answer

D: Either oil or solid cargoes in bulk

Question 21

The main function of a stripping system is to

Accepted Answer

D: discharge liquid left in the cargo tanks after the main pumps have discharged the bulk

Answer

A: maintain the temperature of the cargo throughout the vessel

Answer

B: dispose of dangerous vapors within the cargo tanks

Answer

C: increase the loading rate of the shoreside pumps

Question 22

Pollution regulations require that each scupper in an enclosed deck area have a

Accepted Answer

B: soft rubber plug

Answer

A: wooden plug

Answer

C: two-piece soft patch

Answer

D: mechanical means of closing

Question 23

During loading and discharging operation in addition o when the cargo tanks have been properly filled each inert gas system must be capable of maintaining a minimum gas pressure of

Accepted Answer

C: 100 millimeters of water pressure

Answer

A: 50 millimeters of water pressure

Answer

B: 25 millimeters of water pressure

Answer

D: 5 millimeters of water pressure

Question 24

When authorized to use chemical agents on an oil spill they would

Accepted Answer

C: facilitate the removal of the pollutant from the water

Answer

A: absorb the oil for easy removal

Answer

B: dissolve the oil in the water

Answer

D: sink the oil

Question 25

In developing the stability booklet, consideration must be given to including the following information: which one of these will be most important prior sailing out?

Accepted Answer

C: A rapid and simple means for evaluating other loading conditions.

Answer

A: Tank sounding tables showing capacities, vertical centers of gravity, and longitudinal centers of gravity in graduated intervals and showing free surface data for each tank.

Answer

B: Information on maximum KG or minimum GM curve that can be used to determine compliance with applicable intact and damage stability criteria.

Answer

D: A brief description of the stability calculations done including assumptions.

Question 26

One of the requirements of a vessel’s intact stability criteria is that:

Accepted Answer

D: The GZ should be at least 0.20 metres at an angle of 30 degrees or more

Answer

A: The GZ should be at least 0.15 metres at an angle of 25 degrees or more

Answer

B: The GZ should be at least 0.15 metres at an angle of 30 degrees or more

Answer

C: The GZ should be at least 0.20 metres at an angle of 25 degrees or more

Question 27

As regulation 12 of Annex 1 of MARPOL, all ships of __________ gross tonnage and above shall be provided with a sludge tank for collection of oil residues

Accepted Answer

D: 400 gross tonnage

Answer

A: 150 tonnes deadweight

Answer

B: 150 gross tonnage

Answer

C: 400 tonnes deadweight

Question 28

The lowest temperature at which a liquid will give off sufficient vapors to form a flammable mixture with air is known as the _________.

Accepted Answer

B: flash point

Answer

A: fire point

Answer

C: lower explosive limit

Answer

D: threshold limit value

Question 29

The high-level overfill tank alarm, installed in the on-board monitoring system, must

Accepted Answer

B: be both audible and visual

Answer

A: operate in unison with other alarms

Answer

C: be the same as the overfill alarm

Answer

D: sound when the tank is 90% full

Question 30

What is NOT a precaution to be taken when topping off?

Accepted Answer

B: Notify the engine room of the procedure.

Answer

A: Reduce the loading rate.

Answer

C: Maintain communications with the dock man.

Answer

D: Give the operation your undivided attention.

Advanced Training for Chemical Tanker Cargo Operations (CHEMCO) (Set 13)

Prior to entering a cargo pump room, you should ensure that

Questions in CHEMCO Set 13

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