Pump 7

Question 1

The fire service utilizes three basic types of fire streams:

Answer 1

Solid
Fog
Broken

Question 2

A ($$$$$) is a fire stream produced for a fixed orifice, smoothbore, nozzle.

Answer 2

Solid stream

Question 3

Solid stream nozzles are designed so that the shape of the water in the nozzle is gradually reduced until it reaches a point a short distance from the outlet. At this point, the nozzle becomes a cylindrical bore whose length is from ($$$$$) times its diameter.

Answer 3

1 to 1 1/2 times

Question 4

When solid stream nozzles are used on hand lines, they should be operated at ($$$$$) nozzle pressure

Answer 4

50 psi

Question 5

A solid stream master stream device should be operated at ($$$$$).

Answer 5

80 psi

Question 6

Gpm formula solid stream nozzle

Answer 6

Gpm = 29.7 x d2 x square root of np

Question 7

($$$$$$). The line bounding a round surface; the outward boundary of an object distinguished from its internal regions.

Answer 7

Periphery

Question 8

($$$$$$) a turning or state of being turned; a turning form a straight line or a giving course; a bending; a deviation.

Answer 8

Deflection

Question 9

($$$$). To strike or dash about or against; a turning from a straight line or a given course; to come together with force.

Answer 9

Impinge

Question 10

($$$$) nozzles are designed to flow a specific amount of water at a specific nozzle discharge pressure on all stream patterns.

Answer 10

Constant flow

Question 11

Most constant flow nozzles are designed to operate at a nozzle pressure of ($$$$$)., although there are some that operate at ($$$$) or ($$$$)

Answer 11

100 psi
50 psi
75 psi

Question 12

($$$$) this nozzle has a number of constant flow settings, enabling the firefighter to select a flow rate that best suits the existing conditions.

Answer 12

Adjustable gallon age nozzle

Question 13

The minimum flow setting for interior structural fire fighting is ($$$$$)

Answer 13

95-100 gpm

Question 14

($$$$$) also referred to as ($$$$) or ($$$$$) are basically variable flow nozzles with patter change capability and the ability to maintain the same nozzle pressure.

Answer 14

Automatic nozzles
Constant pressure nozzles
Multi purpose nozzles

Question 15

High pasture fog nozzles operate at pressures up to ($$$$$)

Answer 15

800 psi

Question 16

High pressure fog nozzles and lines are best suited for wild land firefighting. These lines are not recommended for structural fire fighting because they generally flow in the neighborhood of ($$$$$$)

Answer 16

8 to 15 gpm

Question 17

Venally ($$$$$) is the maximum amount of water that can safely flow through a handline nozzle.

Answer 17

350 gpm

Question 18

The term ($$$$$) is applied to any fire stream that is too large to be controlled without mechanical aid.

Answer 18

Master stream

Question 19

Smooth bore master streams are usually operated at ($$$$$). And fog master streams at ($$$$$). Master stream flows are usually ($$$$) or greater.

Answer 19

80 psi
100 psi
350 gpm

Question 20

($$$$$) are often incorrectly referred to as deluge sets, but they differ in one important way. With a monitor the stream direction and angle can be changed while water is still being discharged.

Answer 20

Monitor

Question 21

There are the basic types of monitors

Answer 21

Fixed
Portable
Combination

Question 22

The ()))$$$) is some times called a deck gun or turret and is permanently mounted on the apparatus.

Answer 22

Fixed monitor

Question 23

The ($$$$$) consist of a short length of large diameter hose with a large nozzle or large play pipe supported at the discharge end by a tripod.

Answer 23

Deluge set

Question 24

Broken stream nozzles differ from fog stream nozzles in that fog stream nozzles use defliction or impinging streams, while ($$$$$) are created when water is forced through a series of small holes on the discharge side of the nozzle.

Answer 24

Broken stream nozzles

Question 25

($$$$) produce a fan shaped stream intended to protect combustible materials from the heat of an adjacent fire.

Answer 25

Water curtain nozzle

Question 26

($$$$$) also called ($$$$$) are commonly used in aircraft firefighting and apply water to areas that are otherwise inaccessible to water streams, such as voids in attics under light weight roof systems.

Answer 26

Piercing

Penetrating

Question 27

The piercing nozzle is a ($$$$$) hollow steel rod ($$$) in diameter. The discharge end is usually a hardened steel point able for driving through concrete block or other type walls.. Built into that point is a impinging jet nozzle generally capable of delivering ($$$$)

Answer 27

3 to 6 feet long
1 1/2 inches
100 gpm

Question 28

($$$$) have been developed to attack chimney flute fires.

Answer 28

Chimney nozzles

Question 29

The chimney nozzle is designed to be placed on the end of a booster hose. The nozzle is a solid piece of brass or steel with numerous, very small impinging holes. At a nozzle pressure of 100 psi a chimney nozzle generally produces only ($$$$) of water in a very fine mist fog cone.

Answer 29

1.5 to 3 gpm

Question 30

As water is discharged from a nozzle at a given pressure, a force pushes back at the firefighters handling the hose line. This counter force known as ($$$$$), clearly illustrates Newton’s third law of motion.

Answer 30

Nozzle reaction

Question 31

This law states that for every action ther is an equal and opposite reaction.

Answer 31

Newton’s third law of motion

Question 32

Test have revealed that the practical working limits for velocity of fire streams are within($$$$$). These limiting velocities are produced by nozzle precursor that range from ($$$$$).

Answer 32

60 to 120 feet

25 to 100 psi

Question 33

Nozzle reaction for solid stream nozzles.

Answer 33

Nr = 1.57 x d2 x np

Question 34

Nozzle reaction solid stream (rule of thumb)

Answer 34

Nr= Q/3

Question 35

Nozzle reaction fog

Answer 35

Nr= 0.0505 x Q x square root of nozzle pressure

Question 36

Rule of thumb fog nozzle pressure

Answer 36

Np=Q/2