Chapter 2

Question 1

• which refers to the ratio of the weight of the liquid or the solid
  substance to the weight of an equal volume of water.

Answer 1

SPECIFIC GRAVITY

Question 2

• which is the weight of the volume of pure gas opposed to the
  weight of a volume of dry air with the same temperature and pressure.

Answer 2

VAPOR DENSITY

Question 3

• refers to the measure of the degree of thermal agitation or
  disturbance of molecules.

Answer 3

TEMPERATURE

Question 4

which is the force exerted by the molecules on the surface of the
liquid at equilibrium.

Answer 4

VAPOR PRESSURE -

Question 5

which refers to the lowest temperature of a liquid in an open container at which vapors are developed fast enough to support uninterrupted combustion.

Answer 5

FIRE POINT -

Question 6

which refers to the heat at which a flammable liquid forms a vapor-air mixture that ignites.

Answer 6

FLASH POINT -

Question 7

• which is also referred to as ignition temperature refers to the minimum temperature to which the substance in the air must be heated in order to start a self-contained combustion without adding heat from other sources.

Answer 7

KINDLING TEMPERATURE

Question 8

• which is the constant heat at which vapor pressure of the liquid is
  equal to the atmospheric pressure.

Answer 8

BOILING POINT

Question 9

• which refers to changes whereby heat is added or absorbed before the reaction takes place. Energy is conserved in chemical reactions.if stronger bonds break than are formed, heat must be absorbed from the sutroundings, and the reaction is endothermic. Spontaneous endothermic reactions are also well known such as the dissolving of salt in water.

Answer 9

ENDOTHERMIC REACTIONS

Question 10

• are those that give off or release energy or heat which
  produces substance with less energy than the reactants.

Answer 10

EXOTHERMIC REACTIONS

Question 11

• which refers to the chemical changes which combustible materials and oxidizing agentsreacts. Some reactions, such as expiosions and fire, take place swiftiy.Other reactions, such as rusting, transpire slowly.

Answer 11

OXIDATION

Question 12

• refers to a, glowing body of mixed gases undergoing the process of combustion. Flames commonly consist of a mixture of oxygen (or air) and another gas.usually such combustible substances as hydrogen, carbon monoxide, or hydrocarbon.

Answer 12

FLAMES

Question 13

• the color of the flame is blue due to the almost complete combustion of the fuel and has relatively high temperature and forms no soot deposit

Answer 13

Nonluminous flame

Question 14

• the color is orangered due to incomplete combustion of the fuel,has relatively lower temperature and will deposit soot to anything being subjected to it

Answer 14

Luminous flame

Question 15

which refer to those having iregular and unsteady swirls

Answer 15

TURBULENT FLAMES

Question 16

which refer to flames which generaly follows a smooth path through a gaseous flame.

Answer 16

LAMINAR FLAMES

Question 17

• are manifested when fuel alone is forced through a nozde into the atmosphere which spread in the surrounding atmosphere forming a flammable mixture.

Answer 17

DIFFUSION FLAMES

Question 18

• are those observed when hydrocarbon is mixed wifh air before
  reaching the flame zone.

Answer 18

PRE-MIXED FLAMES

Question 19

which is made up of minute or fine solid particles and condensed vapor
resulting from combustion.

Answer 19

Smoke

Question 20

-indication that the fuel used in the fire

Answer 20

Black smoke with deep red ltmus flames

Question 21

the result when the fuel used is manganese or chiorine.

Answer 21

Greenish yellow fame

Question 22

-indicates that caicium is used.

Answer 22

Bright reddish-yelow flame

Question 23

• an indication that nitrogen products
  were used in the fire.

Answer 23

Heavy brown smoke with bright red flames

Question 24

indicates that magnesium is used.

Answer 24

White smoke with bright red flames

Question 25

would specily that asphalt shingles.

Answer 25

Black smoke wifth red and blue-green flames -

Question 26

would show that potassium was used in the fire as fuel

Answer 26

Lavender or purple flames

Question 27

are gases which remain when the products of combustion are cooled to
normal temperature.

Answer 27

Fire gases

Question 28

are incondescent gases which accompanies rapid oxidation of any
combustible material.

Answer 28

Flames

Question 29

which is always measured as high temperature is a normal resuft of combustion.

Answer 29

Heat