Assessment: Gas Detection on Ships

Gas Detection on Ships

Gas Detection on Ships

Hazardous gases found onboard and how to detect them.

0%
Introduction to Hazardous Gases 13 minutes
Ship Types and Hazardous Gases 10 minutes
Gas Detection Systems 12 minutes
Portable Gas Sampling and Monitoring 5 minutes
Assessment: Gas Detection on Ships 6 minutes

Lessons

Gas Detection on Ships

Gas Detection on Ships

Hazardous gases found onboard and how to detect them.

0%
Introduction to Hazardous Gases 13 minutes
Ship Types and Hazardous Gases 10 minutes
Gas Detection Systems 12 minutes
Portable Gas Sampling and Monitoring 5 minutes
Assessment: Gas Detection on Ships 6 minutes
2

Assessment: Gas Detection on Ships

  • 15
  • Questions
  • No time limit
  • 2
  • Attempts left
  • 70%
  • Passing threshold

Question 1 of 15

When a fixed gas detection is fitted in an enclosed space, are portable devices still needed for entry?

Question 2 of 15

What pipe material must be used when sampling for Hydrogen Sulphide gas?

Question 3 of 15

IR sensors are resilient to silicon poisoning. Is this statement true or false?

Question 4 of 15

In which place would you normally find fixed gas detection on tankers?

Question 5 of 15

How long are catalytical-type sensors expected to last?

Question 6 of 15

How are explosive gases normally measured?

Question 7 of 15

What type of sensor is used to measure oxygen levels?

Question 8 of 15

At what concentration is a flammable gas considered explosive?

Question 9 of 15

What is the function of a Flame Arrestor in the sampling system?

Question 10 of 15

Which gas is considered explosive or flammable?

Question 11 of 15

What is the purpose of fitting a gas detector in a ventilation duct?

Question 12 of 15

What kind of gas detection is required in water ballast tanks adjacent to cargo tanks on newer tankers?

Question 13 of 15

Why must the airflow in a ventilation duct be switched off during testing and calibration?

Question 14 of 15

Oxygen sensors have an effective life of 5 or more years. Is this statement true or false?

Question 15 of 15

How is Hydrogen Sulphide gas recognised by your senses?

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When a fixed gas detection is fitted in an enclosed space, are portable devices still needed for entry?

Only in cold climates.
Your answer
Yes, always.
Your answer
Only in tropical areas.
Your answer
No, never.
Your answer

What pipe material must be used when sampling for Hydrogen Sulphide gas?

Stainless steel.
Your answer
Brass.
Your answer
Copper.
Your answer
Plastic.
Your answer

IR sensors are resilient to silicon poisoning. Is this statement true or false?

False.
Your answer
True.
Your answer

In which place would you normally find fixed gas detection on tankers?

Pump room.
Your answer
Chief Engineer's Office?
Your answer
Personal cabins.
Your answer
Bridge.
Your answer

How long are catalytical-type sensors expected to last?

5 years.
Your answer
They have no effective lifespan.
Your answer
10 years.
Your answer
2 years.
Your answer

How are explosive gases normally measured?

Grams / Metre³
Your answer
In % Lower Flammable Limit.
Your answer
In % Upper Flammable Limit.
Your answer
Parts Per Million.
Your answer

What type of sensor is used to measure oxygen levels?

Electro-chemical sensors.
Your answer
IR sensors.
Your answer
Catalytical sensors.
Your answer
Semiconductors.
Your answer

At what concentration is a flammable gas considered explosive?

Less than 10% LFL.
Your answer
More than 100% LFL.
Your answer
At 100% Volume.
Your answer
More than 100 PPM.
Your answer

What is the function of a Flame Arrestor in the sampling system?

To provide maintenance opportunities.
Your answer
To shorten the sampling line.
Your answer
To prevent explosions.
Your answer
To increase the lifespan of the sensors.
Your answer

Which gas is considered explosive or flammable?

Carbon Dioxide.
Your answer
Propane.
Your answer
Water Mist.
Your answer
Nitrogen.
Your answer

What is the purpose of fitting a gas detector in a ventilation duct?

To trip the engines in case of very humid air.
Your answer
To detect all kinds of gasses with only one detector.
Your answer
To trip the ventilation air in case of a gas leak outside.
Your answer
To notify the bridge of the outside air temperature.
Your answer

What kind of gas detection is required in water ballast tanks adjacent to cargo tanks on newer tankers?

Portable gas detection is considered sufficient.
Your answer
Two fixed pipe gas detection points.
Your answer
One suction point fixed gas detection point.
Your answer
No gas detection is required in water ballast tanks.
Your answer

Why must the airflow in a ventilation duct be switched off during testing and calibration?

It increases the readout.
Your answer
It has no effect on the testing.
Your answer
It dilutes the calibration gas.
Your answer
It reduces the temperature too much to get a correct reading.
Your answer

Oxygen sensors have an effective life of 5 or more years. Is this statement true or false?

False.
Your answer
True.
Your answer

How is Hydrogen Sulphide gas recognised by your senses?

It smells like almonds.
Your answer
It smells like rotten eggs.
Your answer
It is not possible to sense, ever.
Your answer
It smells like drying paint.
Your answer
Score: Attempts:

Too Bad! But That Wasn't Enough

Unfortunately you didn’t have enough correct answers to pass the quiz. Try again!

When a fixed gas detection is fitted in an enclosed space, are portable devices still needed for entry?

Only in cold climates.
Your answer
Yes, always.
Your answer
Only in tropical areas.
Your answer
No, never.
Your answer

What pipe material must be used when sampling for Hydrogen Sulphide gas?

Stainless steel.
Your answer
Brass.
Your answer
Copper.
Your answer
Plastic.
Your answer

IR sensors are resilient to silicon poisoning. Is this statement true or false?

False.
Your answer
True.
Your answer

In which place would you normally find fixed gas detection on tankers?

Pump room.
Your answer
Chief Engineer's Office?
Your answer
Personal cabins.
Your answer
Bridge.
Your answer

How long are catalytical-type sensors expected to last?

5 years.
Your answer
They have no effective lifespan.
Your answer
10 years.
Your answer
2 years.
Your answer

How are explosive gases normally measured?

Grams / Metre³
Your answer
In % Lower Flammable Limit.
Your answer
In % Upper Flammable Limit.
Your answer
Parts Per Million.
Your answer

What type of sensor is used to measure oxygen levels?

Electro-chemical sensors.
Your answer
IR sensors.
Your answer
Catalytical sensors.
Your answer
Semiconductors.
Your answer

At what concentration is a flammable gas considered explosive?

Less than 10% LFL.
Your answer
More than 100% LFL.
Your answer
At 100% Volume.
Your answer
More than 100 PPM.
Your answer

What is the function of a Flame Arrestor in the sampling system?

To provide maintenance opportunities.
Your answer
To shorten the sampling line.
Your answer
To prevent explosions.
Your answer
To increase the lifespan of the sensors.
Your answer

Which gas is considered explosive or flammable?

Carbon Dioxide.
Your answer
Propane.
Your answer
Water Mist.
Your answer
Nitrogen.
Your answer

What is the purpose of fitting a gas detector in a ventilation duct?

To trip the engines in case of very humid air.
Your answer
To detect all kinds of gasses with only one detector.
Your answer
To trip the ventilation air in case of a gas leak outside.
Your answer
To notify the bridge of the outside air temperature.
Your answer

What kind of gas detection is required in water ballast tanks adjacent to cargo tanks on newer tankers?

Portable gas detection is considered sufficient.
Your answer
Two fixed pipe gas detection points.
Your answer
One suction point fixed gas detection point.
Your answer
No gas detection is required in water ballast tanks.
Your answer

Why must the airflow in a ventilation duct be switched off during testing and calibration?

It increases the readout.
Your answer
It has no effect on the testing.
Your answer
It dilutes the calibration gas.
Your answer
It reduces the temperature too much to get a correct reading.
Your answer

Oxygen sensors have an effective life of 5 or more years. Is this statement true or false?

False.
Your answer
True.
Your answer

How is Hydrogen Sulphide gas recognised by your senses?

It smells like almonds.
Your answer
It smells like rotten eggs.
Your answer
It is not possible to sense, ever.
Your answer
It smells like drying paint.
Your answer
Score: Attempts:

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