Training Bulletin #55 4" Supply Hose

Question 1

The single-jacket hose consists of a _, high tensile reinforced yarn circular-woven in a _ to maximize hose flexibility and to eliminate _.

Answer 1

• 100 % synthetic
• “twill configuration”
• left hand twist

Question 2

Polyester is used for _ yarns and nylon is used for _ yarns.

Answer 2

• “warp”

- “woof”

Question 3

The woven reinforcement is totally encased in a matrix of _ compound using a single _ extrusion process in a one-piece construction. This process is used to eliminate the possibility of _ found in layered hoses.

Answer 3

• ozone resistant synthetic nitrile rubber
• “through the weave”
• delaminating

Question 4

All 4” supply hose are provided with 4” lightweight, high strength, _, hard coated, rocker lug, male and female couplings, with 4” _ threads.

Answer 4

• aluminum allow

- NST

Question 5

How much does 50’ (one stick) of 4” weigh?

Answer 5

49 pounds

Question 6

Exposure to sea water and contamination by most chemical substances, hydrocarbons, oils, acids, alkalies, and greases have _ effect on short or long term performance of the hose.

Answer 6

No

Question 7

What is the burst pressure of 4”?

Answer 7

750 psi

Question 8

The friction loss characteristics per 100’ of 4” hose at 80 or 100 psi for 500 , 660, 750, 800, and 1000 GPM are what?

Answer 8

• 500 gpm: 5 pounds
• 660 gpm: 9 pounds
• 750 gpm: 11 pounds
• 800 gpm: 12.4 or 12 pounds
• 1000 gpm: 19.1 or 19 pounds