TB 55 4" Supply Hose

Question 1

This single-jacket hose consists of a 100% synthetic, _____ in a “twill configuration” to maximize hose flexibility and to _____.

Answer 1

high tensile reinforced yarn circular-woven / eliminate left hand twist

Question 2

Polyester is used for ____ and nylon is used for _____.

Answer 2

“warp” yarns / “woof” yarns.

Question 3

The woven reinforcement is totally encased in a matrix of _______ using a single “through the weave” extrusion process in a one-piece construction.

Answer 3

ozone resistant synthetic nitrile rubber compound

Question 4

This process is used to eliminate the possibility of _____ found in layered hoses.

Answer 4

delaminating

Question 5

The rubber is both ____ bonded to the woven reinforcement.

Answer 5

chemically and mechanically

Question 6

This utilized product optimizes _____, ______ and rubber to yarn adhesion.

Answer 6

hydrostatic properties / abrasion resistance

Question 7

All 4” supply hose are provided with 4” lightweight, high strength, ______, _____, rocker lug, male and female couplings, with 4” NST threads.

Answer 7

aluminum alloy / hard coated

Question 8

Hose weight is ____ per 50’ section.

Answer 8

49 lbs.

Question 9

Hose color is “_____” yellow and is totally impregnated throughout the rubber compound making up the liner and cover.

Answer 9

high visibility

Question 10

Exposure to sea water and contamination by most chemical substances, hydrocarbons, oils, acids, alkalies, and greases have no effect on ______ of the hose.

Answer 10

short or long term performance

Question 11

Hydrostatic Test Pressure :
Burst Pressure (minimum)

Answer 11

750 psi Acceptance Pressure
500 psi Service Test Pressure
300 psi Kink

Question 12

Hydrostatic Test Pressure :

Proof Pressure

Answer 12

375 psi

Question 13

Friction Loss

1250 GPM

Answer 13

29.5 psi

Question 14

Friction Loss

1500 GPM

Answer 14

42.3 psi

Question 15

Friction Loss

2000 GPM

Answer 15

74.5 psi

Question 16

The 4” nitrile supply hose has a ____ to kink.

Answer 16

propensity

Question 17

Pressurizing the hose will not remove most kinks, but instead may make the problem ___

Answer 17

worse.

Question 18

The 4” nitrile supply hose has a tendency to ____. Loading the hose onto the apparatus should be done in a manner that minimizes air in the line.

Answer 18

trap air

Question 19

Pinholes and cuts should not extend beyond their initial ____.

Answer 19

punctures

Question 20

Hose shall be identified with fire station number and section numbers stamped on the ____.

Answer 20

male couplings.

Question 21

Stamp the station number first, and then the section from ____.

Answer 21

left to right.

Question 22

Stamp the numbers near a ___ to prevent it from rubbing off

Answer 22

lug

Question 23

the hose shall be stenciled with the station numbers. This number shall be applied lengthwise, with____, starting ____ from both couplings.

Answer 23

1-½ “ stencils / six inches

Question 24

Hose shall be rolled so that the station number ____.

Answer 24

shows

Question 25

Driving over hose should be avoided whenever possible. If it is absolutely necessary to drive over the 4” nitrile hose, it is preferable that the hose is approached at a _____ angle so that each tire passes over the hose _____.

Answer 25

45-degree / independently

Question 26

Both light and heavy vehicles should approach and cross the hose at a ______, making sure not to accelerate with a driving wheel in contact with the hose.

Answer 26

slow rate of speed

Question 27

Do not drive over couplings at any time. 4” couplings will get caught between the tires of the ___ and cause severe damage to the hose.

Answer 27

duals