General Chem

Question 1

3 basic rules

Answer 1

1) . Like dissolves like
2) . Opposites attract
3) . Never mix anything with oxidizers

Question 2

3 things with wide flammable ranges

Answer 2

Aldehydes
Alcohol
Ether

Question 3

PPM percentages

Answer 3

1% = 10,000 PPM
10% = 100,000 PPM

Question 4

Teratogen

Answer 4

A material that affects the offspring when a developing embryo or fetus is exposed to that material

Question 5

Vapor pressure range

Answer 5

0 - 760 mmHg

Anything above 760 mmHg is measured in atmospheres (Atm)

Question 6

Pyrophoric

Answer 6

Material that ignites when exposed to dry air at or below 130 F

Question 7

What are the halogens

Answer 7

F (Fluorine)
Cl (Chlorine)
Br (Bromine)
I (Iodine)

Question 8

7 Diatomics

Answer 8

H2, N2, O2, F2
Cl2
Br2
I2

Question 9

Isomers

Answer 9

Empirically the same, structurally different

Question 10

Prefixes

Answer 10

Mono = 1
Di = 2
Tri = 3
Tetra = 4
Penta = 5
Hexa = 6
Hepta = 7
Octa = 8
Nona = 9
Deca = 10

Question 11

Polarity

Answer 11

Has a carbonyl (O=C) or Alcohol (OH)

Super Polar = Glycerol, Glycol, Organic Acid, Alcohol
Polar = Aldehyde, Ketone, Esters
Non-Polar = Hydrocarbon Families, Ether, Organic Peroxides, Alkyl Halides

Question 12

Oxidizers

Answer 12

Incompatible with reducers

Halogens (X2)
Salt Peroxides
Oxysalts
Oxyradicals
Organic Peroxides

Question 13

Reducers

Answer 13

Incompatible with oxidizers

Pi bonds (C=C)
Alcohols (R-OH)
Aldehydes (R-CHO)
Ethers (R-O-R
A.V. Oils

Question 14

1300 rule

Answer 14

Calculate VP x 1300 = PPM of vapor in container/space

Question 15

13 gases lighter than air

Answer 15

4H MEDIC ANNA:

Hydrogen (H2)
Helium (He)
Hydrogen cyanide (HCN)
Hydrogen fluoride (HF)

Methane (CH4)
Ethylene (C2H4)
Diborane (B2H6)
Illuminating gas (mix of methane/ethane)
Carbon Monoxide (CO)

Ammonia (NH3)
Neon (Ne)
Nitrogen (N2)
Acetylene (C2H2)

Question 16

Variables affecting physical and chemical properties

Answer 16

Inverse relationship:

M.W. F.P. B.P. | V.P. V.C. F.R.D. I.T.

Question 17

MSST

Answer 17

Maximum safe storage temperature

Question 18

SADT

Answer 18

Self accelerating decomposition temperature

Question 19

A, a, B

Answer 19

A = salts
a = nonsalts
B = hydrocarbons

Question 20

PPE for ammonia

Answer 20

Is both a flammable gas and corrosive

Can’t wear turnouts or Class A (unless solve for one of the variables)

Question 21

Weight of air

Answer 21

28.5

Question 22

PPM calculation from PID reading

Answer 22

PID reading X CF = Actual PPM

Question 23

02 displacement in PPM calculation

Answer 23

20.9% - actual 02 reading % X 5 X 10,000
.1% of 02 change equals 5,000 PPM (1% = 50,000 PPM)
Since 02 is only 20% (1/5) of air, total air displacement would be 02 PPM displacement X 5 (e.g. .1% of 02 change would be total of 25,000 PPM air displacement)

Question 24

Nonsalts

Answer 24

Nm + Nm

Hydrocarbons, hydrocarbon derivatives, inorganic nonsalts

Question 25

Common oxyradicals

Answer 25

``` (-1) = FO3, ClO3, BrO3, IO3, NO3, MnO3 (-2) = CO3, CrO4, SO4 (-3) = BO3, PO4, AsO4 ```

Question 26

LEL calculation

Answer 26

LEL meter reading X CF = actual LEL

Question 27

DOT classes

Answer 27

Every Good Firefighter Fries Onions Plus Roasts Chicken Mmm 1 - Explosives (table 1 items - placard for any quantity) 2 - Gases 3 - Flammable liquids 4 - Flammable solids 5 - Oxidizing substances and organic peroxides 6 - Poisonous (toxic and infectious substances) 7 - Radioactive materials 8 - Corrosive substances 9 - Miscellaneous HazMat

Question 28

NFPA 704 marking system

Answer 28

``` 4 hazards Specific to facilities Type of hazards and levels 0 (lowest) - 4 (highest) Doesn't show quantity, just the highest hazard of any of the substances per category ```

Question 29

Air monitoring order of priority

Answer 29

``` Radiation Corrosive 02 deficient atmosphere Flammable + explosive atmosphere Acutely/chronically toxic atmosphere Biological/etiological agent atmosphere ```

Question 30

Hydrogen Sulfide

Answer 30

``` H2S Referred to as sewer gas Heavier than air Smells like rotten eggs Fatigues your olfactory sense Can usually smell before can detect on sensor ```

Question 31

O2 range

Answer 31

19.5% - 23.5%

Question 32

Methane

Answer 32

``` CH4 UN 1971 Strong reducer Highly flammable LEL = 5% UEL = 15% F.P. = -306 degrees Auto ignition = 1,004 degrees Lighter than air (VD = .55) ```

Question 33

APIE

Answer 33

Analyze Plan Implement Evaluate

Question 34

What determines when we ground and bond when we transfer fuel?

Answer 34

When the flashpoint of the fuel is less than 100°

Question 35

Why do we ground and bond?

Answer 35

To disperse the electrical potential (ground) and equalize the electrical potential of the containers (bond)