Properties Of Gas And Principles Of Combustion

Question 1

Name the three states of matter

Answer 1

Liquid
Gas
Solid

Question 2

What are the characteristics of a liquid state

Answer 2

A liquid state has a definite volume and definite weight but no definite shape of their own but will take the shape of the container holding them

Question 3

what two factors influence the state that matter exists in?

Answer 3

temperature and pressure

Question 4

Define specific gravity as it applies to solids or liquids.

Answer 4

It is the comparison of a volume of a substance (liquid or solid ) compared to an equal volume of water.

Question 5

the specific gravity of water is

Answer 5

1

Question 6

how many times is mercury heavier than water

Answer 6

13.6 times heavier than water

Question 7

define specific gravity as it applies to vapour

Answer 7

specific gravity as it applies to vapour it is compared to air

Question 8

what is the density of air at STP

Answer 8

air is 0.076

Question 9

state the density of water in the following units and state the specific gravity

lb/cu ft

Answer 9

62.4

1

Question 10

state the density of water in the following units and state the specific gravity
lb/gas

Answer 10

10

1

Question 11

state the density of water in the following units and state the specific gravity
lb/cu in

Answer 11

0.0361

1

Question 12

state the density of water in the following units and state the specific gravity

oz/cu in

Answer 12

0.578

1

Question 13

state the density of water in the following units and state the specific gravity

lb/us gal

Answer 13

8.33

1

Question 14

What gas has a Calorific value of

2500

Answer 14

methane

Question 15

what gas has a Calorific value of 1000btu/cu ft

Answer 15

propane

Question 16

what gas has a Calorific value of 3200 btu/cu ft

Answer 16

butane

Question 17

define btu

Answer 17

the amount of heat required to raise the temperature of 1 lb of water 1F

Question 18

boiling point of propane liquid

Answer 18

-44F

Question 19

boiling point of butane liquid

Answer 19

32F

Question 20

Boiling point of water

Answer 20

212F

Question 21

boiling point of liquefied natural gas

Answer 21

258F

Question 22

what is the density of water in lb/cu ft

Answer 22

62.4

Question 23

what is the density of air in lb/cu ft

Answer 23

0.076 lb / cu ft

Question 24

the specific gravity of natural gas

Answer 24

0.6

Question 25

the specific gravity of liquid propane

Answer 25

.51

Question 26

how many cubic feet of gas are contained in one gallon of propane liquid

Answer 26

43.6

Question 27

how many cubic feet of gas are contained in one gallon of water

Answer 27

272

Question 28

list the main gas present in the atmosphere according to the following % that they represent the atmosphere 20% 79% 1%

Answer 28

oxygen nitrogen other gases

Question 29

when burning gas what is significant of the filling temp 3500F

Answer 29

flame temperature of propane

Question 30

when burning gas what is significant of the filling temp 950F

Answer 30

ignition temperature of propane

Question 31

when burning gas what is significant of the filling temp 1200F

Answer 31

ignition temperature of natural gas

Question 32

when burning gas what is significant of the following temp 3350°F

Answer 32

flame temperature of natural gas

Question 33

when burning gas what is significant of the following temp 825°F

Answer 33

ignition temperature of butane

Question 34

when burning gas what is significant of the following temp 3450°F

Answer 34

flame temperature of butane

Question 35

Define the term combustion

Answer 35

The rapid oxidation of a fuel resulting in the production of heat or heat and light .

Question 36

combustion air

Answer 36

the air required to completely burn the fuel

Question 37

primary air

Answer 37

air required for the initial stages of the combustion process and is mixed with fuel prior to combustion

Question 38

secondary Air

Answer 38

air required for the intermediate and final stages of the combustion process and is added to the flame to produce complete combustion

Question 39

excess Air

Answer 39

air supplied for the combustion process in excess of but not required theoretically

Question 40

combustion products

Answer 40

constituents resulting by uniting fuel with oxygen. this usually thought of as being gad primary and secondary Air

Question 41

range of flammability

Answer 41

the % of gas present in a gas/air mixture between the upper and lower limits that will burn

Question 42

incomplete combustion

Answer 42

combustion that does not convert all the carbon and/or hydrogen in water vapour and/or carbon dioxide

Question 43

lift off

Answer 43

the gas/air mixture speed exceeds the flame speed resulting in a flame that burns to high above the burner

Question 44

flashback

Answer 44

the gas/air mixture is slower than the flame speed causing the flame to burn inside the burner possibly at the orifice

Question 45

what flame colour is most likely to indicate poor combustion

Answer 45

yellow

Question 46

what flame colour usually indicates dust or dirt passing through the flame

Answer 46

orange

Question 47

what colour of flame indicates good combustion

Answer 47

light blue

Question 48

what are 4 symptoms associated with carbon monoxide poisoning

Answer 48

headache short of breath dizziness confusion