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

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

Question 2 of 15

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

Question 3 of 15

How are explosive gases normally measured?

Question 4 of 15

Which factor affects the sampling time on a suction line in a gas sampling system?

Question 5 of 15

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

Question 6 of 15

What is normally NOT required according to IMO rules to enter an enclosed space onboard a ship?

Question 7 of 15

How long are catalytical-type sensors expected to last?

Question 8 of 15

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

Question 9 of 15

What type of sensor is used to measure oxygen levels?

Question 10 of 15

Which gas is considered explosive or flammable?

Question 11 of 15

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

Question 12 of 15

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

Question 13 of 15

How is Hydrogen Sulphide gas recognised by your senses?

Question 14 of 15

At what concentration is a flammable gas considered explosive?

Question 15 of 15

In a water ballast tank, what is the recommended minimum height of the sample pipe from the bottom of the tank?

You Passed This Quiz. Let’s Move On!

Good work! You just completed the quiz Assessment: Gas Detection on Ships. Let’s move on to the next.

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

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

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

True.
Your answer
False.
Your answer

How are explosive gases normally measured?

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

Which factor affects the sampling time on a suction line in a gas sampling system?

Temperature.
Your answer
Pipe length.
Your answer
Pipe material.
Your answer
Time of day.
Your answer

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

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

What is normally NOT required according to IMO rules to enter an enclosed space onboard a ship?

A permit to work.
Your answer
A visual and smell check.
Your answer
Gas levels to be monitored by portable equipment.
Your answer
Personal protective equipment.
Your answer

How long are catalytical-type sensors expected to last?

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

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

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

What type of sensor is used to measure oxygen levels?

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

Which gas is considered explosive or flammable?

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

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

It increases the readout.
Your answer
It dilutes the calibration gas.
Your answer
It has no effect on the testing.
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?

True.
Your answer
False.
Your answer

How is Hydrogen Sulphide gas recognised by your senses?

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

At what concentration is a flammable gas considered explosive?

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

In a water ballast tank, what is the recommended minimum height of the sample pipe from the bottom of the tank?

0.50m.
Your answer
5.00m.
Your answer
1.00m.
Your answer
0.05m.
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!

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

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

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

True.
Your answer
False.
Your answer

How are explosive gases normally measured?

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

Which factor affects the sampling time on a suction line in a gas sampling system?

Temperature.
Your answer
Pipe length.
Your answer
Pipe material.
Your answer
Time of day.
Your answer

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

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

What is normally NOT required according to IMO rules to enter an enclosed space onboard a ship?

A permit to work.
Your answer
A visual and smell check.
Your answer
Gas levels to be monitored by portable equipment.
Your answer
Personal protective equipment.
Your answer

How long are catalytical-type sensors expected to last?

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

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

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

What type of sensor is used to measure oxygen levels?

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

Which gas is considered explosive or flammable?

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

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

It increases the readout.
Your answer
It dilutes the calibration gas.
Your answer
It has no effect on the testing.
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?

True.
Your answer
False.
Your answer

How is Hydrogen Sulphide gas recognised by your senses?

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

At what concentration is a flammable gas considered explosive?

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

In a water ballast tank, what is the recommended minimum height of the sample pipe from the bottom of the tank?

0.50m.
Your answer
5.00m.
Your answer
1.00m.
Your answer
0.05m.
Your answer
Score: Attempts:

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