TASCO exit exam questions and answers — Set 2
Set 2 of the Advanced Training for Oil Tanker Cargo Operations (TASCO) exit exam bank — 30 of 181 questions, with the correct option marked and a one-line explanation for every one. Read it end to end, jump to a single set, or search it — then sit the same bank as a timed paper. The real DG Shipping exit exam is 30 marks with 15 to pass.
These are the bank's original groupings. Practising deals the whole bank out again every time you reshuffle, so a practice “Set 3” is a different 30 questions each time — the set numbers below are the source file's, and are only used here so the key stays navigable. Options are listed in their original order with fixed letters; when you practise, those move too.
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Set 2 — 30 TASCO exit exam questions with answers
1. ____ burns automatically at room temperature.
- A. Sodium
- B. Phosphorus
- C. Iron
- D. Nitrogen
Answer: B — Phosphorus
Phosphorus is a highly reactive chemical element that can spontaneously ignite when exposed to air at ambient room temperatures, requiring specialized storage and handling procedures.
2. What is a hot work permit?
- A. Document used for carrying out repairs under supervision
- B. Document valid for 7 days for carrying out tank cleaning
- C. Document used for work in a drydock
- D. document issued by a responsible person permitting specific hot work to be done during a particular time interval in a defined space
Answer: D — document issued by a responsible person permitting specific hot work to be done during a particular time interval in a defined space
A hot work permit is a critical safety document issued by the responsible officer that authorizes specific work involving heat or sparks in a designated space only after safety measures are verified.
3. What is bonding?
- A. Making a ship to shore cable connection
- B. Connecting together flexible couplings on deck
- C. The connecting together of metal parts to ensure electrical continuity
- D. Connecting together of cargo pipe line flanges
Answer: C — The connecting together of metal parts to ensure electrical continuity
Bonding is the electrical connection between metal parts of a system to ensure electrical continuity, which prevents the build-up of static electricity and potential spark discharges during cargo operations.
4. How Threshold Limit Values are specified?
- A. ppm/volume gas in Air
- B. Volume of Gas in Air
- C. PPM (Parts per Million)
- D. Specific Numbers
Answer: C — PPM (Parts per Million)
Threshold Limit Values (TLV) represent the concentration of substances to which personnel can be exposed daily without adverse effects; these are standardly expressed in Parts per Million (PPM).
5. What is pour point?
- A. The lowest temperature at which a petroleum oil will remain fluid
- B. The temperature at which oil gets frozen
- C. The temperature at which oil cannot be discharged
- D. The temperature at which oil needs to be heated
Answer: A — The lowest temperature at which a petroleum oil will remain fluid
Pour point is the lowest temperature at which a liquid (oil) remains fluid enough to pour under specified test conditions, which is critical for determining pumpability in cold climates.
6. A liquid is considered to be flammable when the flash point is less than
- A. $60^{\circ}$ F
- B. $70^{\circ}$ F
- C. $80^{\circ}$ F
- D. $50^{\circ}$ F
Answer: C — $80^{\circ}$ F
A liquid is defined as flammable in maritime safety standards if its closed-cup flash point is 60°C or lower (often rounded to 140°F), but 80°F is the specific limit frequently cited for high-volatility classification.
7. What is Upper flammable limit?
- A. The limit where there is too much inert gas to support combustion
- B. The concentration of a hydrocarbon gas in air above which there is insufficient oxygen to support combustion
- C. The limit for man entry of personnel into tanks
- D. The limit where there is insufficient inert gas to support combustion
Answer: B — The concentration of a hydrocarbon gas in air above which there is insufficient oxygen to support combustion
The Upper Flammable Limit (UFL) is the maximum concentration of a hydrocarbon gas in air above which the mixture is too 'rich' (insufficient oxygen) to support combustion.
8. What is lower flammable limit?
- A. The concentration of a hydrocarbon gas in air below which there is insufficient hydrocarbon to support combustion
- B. The limit for man entry of personnel into tanks
- C. The limit where there is insufficient oxygen to support combustion
- D. The limit where there is too much oxygen to support combustion
Answer: A — The concentration of a hydrocarbon gas in air below which there is insufficient hydrocarbon to support combustion
The Lower Flammable Limit (LFL) is the lowest concentration of a gas in air that can support combustion; below this limit, the mixture is too 'lean' (insufficient fuel) to ignite.
9. What is cathodic protection?
- A. Protection of the hull of a ship
- B. Cathodes placed on the hull of a ship
- C. The prevention of corrosion by electrochemical techniques
- D. Anodes placed in the stern of a ship
Answer: C — The prevention of corrosion by electrochemical techniques
Cathodic protection is an electrochemical technique used to control the corrosion of a metal surface (like a ship's hull) by making that surface the cathode of an electrochemical cell using sacrificial anodes.
10. Where is smoking permitted on board ship while at a berth?
- A. In the engine room
- B. Anywhere on the ship
- C. In the cargo control room
- D. Designated smoking room
Answer: D — Designated smoking room
Smoking is strictly prohibited on tankers except in specially designated, safe, and controlled areas, as any ignition source near cargo spaces poses a significant fire and explosion risk.
11. As a requirement of SOLAS, the number of sets of full protective clothing resistant to chemical attack that should be provided in addition to firefighters' outfits, is
- A. 2 sets
- B. 4 sets
- C. 3 sets
- D. 5 sets
Answer: A — 2 sets
SOLAS regulations require ships carrying dangerous chemical cargoes to have at least two sets of full protective clothing resistant to chemical attack, separate from standard firefighter outfits, to ensure safety during incidents.
12. What is a material safety data sheet (MSDS)?
- A. It is used for finding out the effects of inhalation
- B. document giving the chemical name of the product
- C. It is used for finding out the dangers of contract
- D. document identifying a substance and all its constituents
Answer: D — document identifying a substance and all its constituents
A Material Safety Data Sheet (MSDS) is an essential document provided by manufacturers that lists the properties, hazards, safe handling procedures, and emergency response information for a specific chemical substance.
13. What is hot work?
- A. Work involving sources of ignition or temperatures sufficiently high to cause the ignition of a flammable gas mixture.
- B. Hot work is carried out in high ambient temperatures
- C. Work carried out using hot material
- D. The temperature is very high where the work is done
Answer: A — Work involving sources of ignition or temperatures sufficiently high to cause the ignition of a flammable gas mixture.
Hot work is defined as any activity that can produce a source of ignition—such as welding, burning, or grinding—in areas where flammable vapors might be present.
14. What is volatile petroleum?
- A. Petroleum having a flashpoint below 100 Degrees C
- B. Petroleum having a flashpoint below 60 Degrees C
- C. Petroleum having a flashpoint above 100 Degrees C
- D. Petroleum having a flashpoint above 60 Degrees C
Answer: B — Petroleum having a flashpoint below 60 Degrees C
Volatile petroleum is defined as any petroleum product with a flash point below 60°C, meaning it can easily form flammable vapor mixtures at normal ambient temperatures.
15. What is flash point?
- A. The lowest temperature at which a liquid gives off sufficient gas to form a flammable gas mixture near the surface of the liquid.
- B. The temperature at which the liquid stops emitting gas
- C. The temperature at which the gas is not flammable
- D. The temperature at which an explosion is not possible
Answer: A — The lowest temperature at which a liquid gives off sufficient gas to form a flammable gas mixture near the surface of the liquid.
Flash point is the lowest temperature at which a liquid emits sufficient vapor to form an ignitable mixture with air near the liquid's surface, as determined by standardized laboratory tests.
16. What is non-volatile petroleum?
- A. Petroleum having a flashpoint of 100 Degrees C or above
- B. Petroleum having a flashpoint of 60 Degrees C or above
- C. Petroleum having a flashpoint of 60 Degrees C or below
- D. Petroleum having a flashpoint of 100 Degrees C or below
Answer: B — Petroleum having a flashpoint of 60 Degrees C or above
Non-volatile petroleum is defined as petroleum having a flash point of 60°C (140°F) or above, meaning it is less likely to form dangerous vapor concentrations under standard operational temperatures.
17. What is purging?
- A. Introducing of oxygen into a tank to a high level
- B. Using natural ventilation to gas free a tank
- C. Using blowers to push oxygen into a tank
- D. The introduction of inert gas into a tank already in the inert condition to further reduce the existing oxygen content or hydrocarbon gas content to a level below which combustion cannot take place if air is introduced
Answer: D — The introduction of inert gas into a tank already in the inert condition to further reduce the existing oxygen content or hydrocarbon gas content to a level below which combustion cannot take place if air is introduced
Purging is the process of displacing an existing tank atmosphere (usually hydrocarbon gas) with inert gas to further reduce the oxygen concentration, ensuring that any subsequent introduction of air will not create a flammable mixture.
18. Fuel must be heated to its ___________ before it starts burning.
- A. flash point
- B. ignition temperature
- C. fire point
- D. boiling point
Answer: B — ignition temperature
Fuel must reach its ignition temperature through external heat transfer for a sustained combustion reaction to begin; this is the temperature where the chemical reaction becomes self-sustaining.
19. What is Nitrogen Asphxiation?
- A. It is unconsciousness caused by Inert gas can lead to death
- B. It is unconsciousness caused by Nitrogen can lead to death
- C. Nitrogen, which is non-flammable, non-toxic and colourless
- D. Nitrogen which is undetectable to the human senses
Answer: B — It is unconsciousness caused by Nitrogen can lead to death
Nitrogen asphyxiation occurs when nitrogen displaces oxygen in an enclosed space, leading to an oxygen-deficient atmosphere that can cause unconsciousness or death due to hypoxia.
20. What is Toxicity
- A. Toxicity is the degree to which a substance or mixture of substances can harm humans.
- B. Toxicity means Acidic
- C. Toxicity means poisonous and affects you on oral consumption
- D. None of the above
Answer: A — Toxicity is the degree to which a substance or mixture of substances can harm humans.
Toxicity is a measure of the inherent ability of a substance to cause harmful effects in humans, whether through inhalation, ingestion, or skin absorption, regardless of its flammability.
21. What is Time Weighted Average?
- A. Averaging all the exposure times for a time period 8 hours
- B. Highest exposure time
- C. Short Term exposure time
- D. Exposure time
Answer: A — Averaging all the exposure times for a time period 8 hours
Time Weighted Average (TWA) represents the average concentration of a substance to which a person may be safely exposed over a specified time period, typically 8 hours, without suffering long-term health effects.
22. Which is a non-accumulator of charges?
- A. Toluene is a Non-accumulator of charges
- B. Alcohols is an Accumulator of charges
- C. Cyclohexane is a Non-accumulator of charges
- D. Kotones is a Non-accumulator of charges
Answer: D — Kotones is a Non-accumulator of charges
Ketones are classified as non-accumulators of static charge because they possess sufficient conductivity to dissipate charge build-up during cargo transfer. Toluene and cyclohexane are hydrocarbons with low conductivity (accumulators), while alcohols are generally polar but often treated differently; ketones are the standard example of a non-accumulator in this context.
23. What is Auto-ignition?
- A. Ignition of materials when they come in contact with each other
- B. The ignition of a combustible material without initiation by a spark or flame, when the material has been raised to a temperature at which self-sustaining combustion occurs.
- C. Automatic ignition of material in a hot atmosphere
- D. Ignition caused by mixture of vapours given of by cargoes
Answer: B — The ignition of a combustible material without initiation by a spark or flame, when the material has been raised to a temperature at which self-sustaining combustion occurs.
Auto-ignition refers to the property of a substance whereby it ignites spontaneously without the requirement of an external ignition source like a spark or flame. This occurs once the material reaches its auto-ignition temperature in the presence of an oxidant.
24. Which of the following is a supporter of combustion?
- A. oxygen gas
- B. producer gas
- C. nitrogen gas
- D. cooking gas
Answer: A — oxygen gas
Oxygen is the primary supporter of combustion in the fire triangle. Without a sufficient concentration of oxygen, the chemical reaction of fire cannot be sustained.
25. Tank clingage depends on:
- A. cohesive forces, adhesive forces and the liquids melting point
- B. cohesive, adhesive forces and surface tension
- C. surface tension only
- D. cohesive and adhesive forces
Answer: B — cohesive, adhesive forces and surface tension
Tank clingage is the amount of cargo remaining on tank surfaces after discharge, influenced by the complex interaction of the liquid's surface tension, and the adhesive/cohesive forces between the liquid and the tank bulkhead.
26. Oxygen Analyzer: what is your key finding in measuring oxygen level?
- A. Oxygen is strongly paramagnetic whereas most other common gases are not.
- B. Portable oxygen analyzers are normally used to determine whether the atmosphere inside an enclosed space (cargo tank for example) may be considered fully inerted or safe for entry.
- C. Fixed oxygen analyzers can be used for monitoring the oxygen content of the boiler uptakes and the inert gas main.
- D. The common types of oxygen analyzers in use are, Paramagnetic sensors and Electrochemical sensors.
Answer: B — Portable oxygen analyzers are normally used to determine whether the atmosphere inside an enclosed space (cargo tank for example) may be considered fully inerted or safe for entry.
The primary objective of using a portable oxygen analyzer on a tanker is to ensure the atmosphere is safe for human entry (21% O2) or to verify the efficacy of inert gas systems to prevent combustion.
27. Key Features and Measurement of an Effective Safety Culture; identify one statement that identifies an effective safety culture
- A. Recognition that all accidents are preventable and only usually occur following unsafe actions or a failure to follow established procedures
- B. safety management system that is always setting targets for continuous improvement, with a goal of zero accidents
- C. Individual seafarers assume responsibility for safety rather than relying on others to provide it
- D. Through mutual respect, increasing confidence in the value of the safety culture results in a more effective Safety Management System
Answer: B — safety management system that is always setting targets for continuous improvement, with a goal of zero accidents
An effective safety culture is characterized by the continuous pursuit of excellence. Setting measurable targets for improvement and striving for the goal of zero accidents is a cornerstone of modern safety management systems.
28. What is the maximum interval of time between sampling and analysing for each sampling head location sequentially?
- A. Not exceeding 30 minutes interval
- B. Not exceeding 40 minutes interval
- C. Not exceeding 50 minutes interval
- D. Not exceeding 60 minutes interval
Answer: A — Not exceeding 30 minutes interval
In fixed gas sampling systems, the regulation requires that the sequence of sampling from various heads is frequent enough to ensure safety. An interval not exceeding 30 minutes is the industry standard to ensure real-time hazard detection.
29. Class D fires involve
- A. Vapour/air mixture over the surface of flammable liquids
- B. Solid cellulosic materials such as wood, paper, clothing, etc.
- C. Energised electrical equipment
- D. Combustible materials such as magnesium, sodium, etc.
Answer: D — Combustible materials such as magnesium, sodium, etc.
Class D fires are specifically defined as those involving combustible metals, such as magnesium, titanium, sodium, or potassium, which require specialized extinguishing agents.
30. The hydrocarbon content in the atmosphere of a pump room is measured using a
- A. Alarm system detector
- B. Explosimeter
- C. The Draeger instrument
- D. Tankscope
Answer: C — The Draeger instrument
Draeger-type gas detection tubes are commonly used on ships to provide accurate, localized concentration readings of specific hydrocarbon gases in various compartments, including pump rooms.
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