Test for seamans about H2S Hydrogen Sulphide Awareness

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Правильні відповіді:
1

Can H2S be dissolved into water?

Ваша відповідь правильна:

Yes.
2

How does the density of H2S compare to that of air?

Ваша відповідь правильна:

H2S is heavier than air.
3

ISGOTT recommends that workers wear a personal alarm when they may be exposed to H2S. At what level does ISGOTT recommend that the alarm be set?

Ваша відповідь правильна:

TLV-TWA.
4

ISGOTT refers to TLVs when talking about H2S exposure. What does “TLV” stand for in this case?

Ваша відповідь правильна:

Threshold Limit Value.
5

In which one of the following places on a ship is H2S most likely to be found?

Ваша відповідь правильна:

Sewage tanks.
6

Over what time are the H2S levels averaged when calculating ISGOTT’s TLV-TWA?

Ваша відповідь правильна:

8 hours.
7

Select all the symptoms that you think may be symptoms of harmful exposure to H2S?

Ваша відповідь правильна:

Coughing.; Eye irritation.; Sickness.; Sleepiness.
8

Select all the symptoms that you think may be symptoms of harmful exposure to H2S?

Ваша відповідь правильна:

Sleepiness.; Loss of reasoning and balance.; Unconsciousness.; Stopped breathing.
9

What does ISGOTT recommend that you do when the H2S level is expected to rise rapidly, such as when removing cargo line blanks?

Ваша відповідь правильна:

Wear SCBA.
10

What is the ISGOTT Time Weighted Average exposure limit (TLV-TWA) quoted for H2S in this module?

Ваша відповідь правильна:

5 ppm.
11

What is the allowable exposure limit for H2S?

Ваша відповідь правильна:

There is no single allowable limit. Different regulations set different limits.
12

Which of the following best describes how a gas detection tube is used to find out if H2S is present in a space?

Ваша відповідь правильна:

The amount of colour change in the tube gives an H2 reading.
13

Which of the following best describes the effect on your skin caused by exposure to H2S over long periods?

Ваша відповідь правильна:

Various skin disorders.
14

Which of the following best describes the possible effect of drinking alcohol before being exposed to H2S?

Ваша відповідь правильна:

The effects of H2S are worse.
15

Which of the following is the best action if you begin to show symptoms of H2S exposure?

Ваша відповідь правильна:

Get fresh air, leave the work area and call for help.
16

Which one of the following best describes a major safety hazard of H2S?

Ваша відповідь правильна:

It is explosive.
17

Which one of the following best describes the effect of exposure to a low level of H2S on your eyes?

Ваша відповідь правильна:

Minor eye irritation.
18

Which one of the following best describes the factors that decide how much H2S exposure affects your body?

Ваша відповідь правильна:

Frequency, intensity and duration of exposure as well as individual factors.
19

Which one of the following best describes why we often use a time weighted average when measuring H2S exposure?

Ваша відповідь правильна:

It measures two of the most important factors which determine the harm caused by H2S.
20

Which one of the following describes how H2S would normally enter your body while on board a ship?

Ваша відповідь правильна:

Absorption and inhalation.
21

Which one of the following describes how an electric meter can be used to safely measure H2S, a flammable gas?

Ваша відповідь правильна:

The meter is certified for use in explosive atmospheres.
22

Which one of the following describes the main source of the H2S found on board ships?

Ваша відповідь правильна:

Natural organic decay.
23

Which one of the following describes the most likely way H2S can be brought on board a ship?

Ваша відповідь правильна:

Bunkering residual fuel oil.
24

Which one of the following does ISGOTT recommend you do if your personal H2S alarm sounds while you are at the bottom of a cargo tank?

Ваша відповідь правильна:

Use an emergency air supply while you move to a safe area.
25

Which one of the following is a symptom of H2S exposure?

Ваша відповідь правильна:

Nausea or sickness.
26

Which one of the following is the best way to approach a workplace where H2S is expected to be, according to this module?

Ваша відповідь правильна:

Approach while using a detector which takes continuous H2S measurements.
27

Which one of the following is the best way to approach a workplace where H2S is suspected to be, if continuous monitoring is not available?

Ваша відповідь правильна:

Wear a positive pressure SCBA until H2S levels have been shown to be safe.
28

Which one of the following may protect you from H2S, while you give artificial respiration on a ship to someone who has been exposed to H2S?

Ваша відповідь правильна:

A pocket face mask.
29

Which one of the following statements about H2S is true?

Ваша відповідь правильна:

H2S may still remain in an oil cargo tank after gas freeing.
30

Which one of these statements correctly describes the colour of H2S?

Ваша відповідь правильна:

Colourless.
31

Which one of these statements correctly describes the smell of H2S?

Ваша відповідь правильна:

It smells like rotten-eggs.
32

Which one of these statements correctly describes what happens when we try to burn H2S?

Ваша відповідь правильна:

H2S burns in air with a blue flame.
33

Which option best describes what happens if you breathe so much H2S into your lungs that your body is unable to break it down?

Ваша відповідь правильна:

Your lungs will stop working and you can suffocate and die.
34

Why is it dangerous to rely on your sense of smell to detect the presence of H2S?

Ваша відповідь правильна:

H2S can cause you to lose your sense of smell.
35

You start to smell H2S while working. Which one of the following would you expect to be the first symptom you notice if H2S levels continue to rise?

Ваша відповідь правильна:

Eyes start to water.
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