Test Your Hydrogen Sulfide Safety Knowledge

Corrosion due to H2SO4 is often referred to as _____________

Inferior Corrosion

Super Corrosion

Sweet Corrosion

Sour Corrosion

Correct! Wrong!

Due to presence of H2S in crude oil, iron sulfide forms a scale at low temperatures and this iron sulfide is also called as _________

Scaling Inhibitor

Corrosion Inhibitor

Acid

Pyrophoric Compound

Correct! Wrong!

What is the colour of H2S Gas?

Greenish Yellow

Colorless

Light blue

Yellow

Correct! Wrong!

H2S is colorless and ________than air.

Slightly Lighter

Lighter

Neither Lighter Nor Heavier

Heavier

Correct! Wrong!

__________ Odor threshold of H2S i.e. When rotten egg smell is first noticeable to some.

2 to 3 PPM

0.1 to 3 PPM

0.01 to 1.5 PPM

10 PPM

Correct! Wrong!

LEL of H2S is __________

3.5 percent

10 PPM

4.4 percent

15 PPM

Correct! Wrong!

TLV-TWA of H2S is ________

100 PPM

15 PPM

10 PPM

20 PPM100 PPM

Correct! Wrong!

NIOSH - IDLH of H2S is _________

20 PPM

15 PPM

100 PPM

10 PPM

Correct! Wrong!

STEL-TWA of H2S is _____

15 PPM

20 PPM

10 PPM

100 PPM

Correct! Wrong!

UEL of H2S is _______

20 PPM

43 percent

46 percent

10 PPM

Correct! Wrong!

According to OSHA PELs, general Industrial Ceiling limit of H2S is

15 PPM

20 PPM

10 PPM

100 PPM

Correct! Wrong!

According to OSHA PELs, Shipyard 8-hour limit of H2S is _________

10 PPM

50 PPM

20 PPM

100 PPM

Correct! Wrong!

H2S combines with water to form ___________, a strongly corrosive acid.

HCL

H2SO4

HNO3

H2CO3

Correct! Wrong!

Which one below is a false statement?

H2S is flammable gas

H2S is odor less gas at low concertation

H2S is Toxic gas

H2S is deadliest gas

Correct! Wrong!

According to OSHA PELs, Construction 8-hour limit of H2S is _________

10 PPM

50 PPM

100 PPM

20 PPM

Correct! Wrong!

According to OSHA PELs, general Industrial peak limit of H2S is _________

10 PPM

100 PPM

20 PPM

50 PPM

Correct! Wrong!

Test Your Hydrogen Sulfide Safety Knowledge

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