Ch 7 HOSE

Question 1

High Pressure Engines carry 3 1/2” hp hose with 3” couplings.
True or False
Whats the Max pressure of this hose ?
What identifies a High Pressure couplings and Fittings ?

Answer 1

FALSE!!
High pressure engine companies carry ** 3 inch high pressure hose *** with 3 inch
couplings.
This hose has a maximum working pressure of 600 psi. High pressure
hose couplings and fittings are painted white for identification and are noticeably
heavier than standard couplings and fittings
Sec 7.2.3

Question 2

Pursuant to the requirements determined by the Bureau of Operations, each engine
company should maintain a minimum of _____?? This includes
hose for winter operations, standpipe operations and replacement lengths stored in
quarters as well as that which is carried in the apparatus hose beds.

Answer 2

20 lengths of 1 3/4 inch,
30 lengths of 2 1/2 inch
10 lengths of 3 1/2 inch hose
Sec 7.2.5

Question 3

Manufacturer’s name or trademark and
Date of Issuance to unit is on the Male or Female coupling ?

The Company and registry numbers are found on Male or Female coupling ?

Answer 3

Female coupling
female takes the NAME on DATE of wedding

Male Coupling
Sec 7.3.1

Question 4

The date of issuance is to be entered in the

Answer 4

Office Record Journal

Sec 7.3.2

Question 5

7.5.1 The maximum pressure in hose lines should be limited to_____ psi. Only
emergency needs which allow for no other corrective action permit the use of
higher pump pressures, which can only be ordered by whom ?

Answer 5

250 psi

Pressures in excess of 250 psi can only be ordered by the
IC.
Sec 7.5.1

Question 6

The 1 3/4 inch handline is the primary attack line used at structural fires. This
hose when used in conjunction with the 15/16 inch MST and controlling nozzle,
provides an adequate fire stream and has better maneuverability and easier
handling than the larger 2 1/2 inch handline. At a nozzle pressure of _______ the
1 3/4 inch handline will flow approximately

Answer 6

50 psi
180 gpm

Sec 7.6.1

Question 7

The use of 1 3/4 inch hose would be inappropriate and a company officer should
not order it stretched if any of the following conditions exist:

Answer 7

DALLAS

• The line is expected to be used from a purely defensive position.
• An advanced fire on arrival.
• A large volume of water is required to cool a superheated fire area.
• A large body of fire in a large uncompartmented area.
• When the officer cannot determine the size or extent of the fire or fire area.
Sec 7.6.3

Question 8

3 1/2 inch hose is used to provide greater water flows with less friction loss. This
hose should be used to:

Answer 8

• Supply standpipe and sprinkler systems.
• Supply large caliber streams.
• Relay water to other engine companies.
• In-line supply for the first due engine company.
Sec 7.6.8

Question 9

Apparatus shall not be driven over hose lines unless absolutely necessary. When it
is necessary to drive over hose lines, the following precautions should be taken:

Answer 9

• Charge the line if possible. Hose is more susceptible to damage when it is
uncharged than when it is charged because the wheels tend to separate the
jacket from the rubber lining of dry hose.
• Running over couplings should be avoided.
• To prevent the hose from bursting, speed should be reduced to a minimum.
• 5-inch hose should not be driven over unless properly bridged.
Sec 7.8.6

Question 10

Units must check the hose bed, roll-ups and stored hose serial numbers for
replacement due to age. The age of the hose is determined by
Any hose that will reach ____ years in the current calendar year is to be taken out of service
Who is notified ?

Answer 10

the first two numbers of the serial number stamped on the coupling

10 years
with the company officer immediately notifying the Fire Tools and Equipment Unit via fax
the serial numbers, size and length for replacement
Sec 7.11.1

Question 11

Hose with aluminum alloy couplings should be uncoupled when ? and the
threads should be what ?

Answer 11

Monthly
greased to prevent seizing
Sec 7.11.1

Question 12

Before connecting lengths of hose, the couplings should be checked for ??
If defective call who ?

Answer 12

cracks
out of round
burred threads
and the presence of a washer in the
female coupling.
Technical Services
Sec 7.11.2

Question 13

Engine companies should maintain spare washers for each size hose
carried, both in quarters and on the apparatus. Spare washers may be
requested from

Answer 13

Technical Services.

Sec 7.11.2

Question 14

Loading the hose in the hose bed

Load hose from ??

Answer 14

left to right

Sec 7.12.7

Question 15

As required by Section 13.2.8 of the Regulations, engine companies shall carry not
less than how many lengths of 1 3/4 ? 2 1/2 ?
Additionally, each engine company shall ensure that an extra length of what is stored on the apparatus

Answer 15

3 lengths of 2 1/2 inch and
Not less than 3 lengths of 1 3/4 inch hose (rolled or folded) and the necessary fittings to place a line into operation

1 3/4 inch hose with nozzle, either rolled or folded,
Sec 7.13.1

Question 16

Conduct a visual inspection of hose while preparing it for test and prior to
charging with water. The following defects noted during the inspection would
exclude the hose from being tested.

Answer 16

• Abrasions.
• Mildew or rot.
• Burnt hose jacket.
• Worn hose jacket, be sure to inspect area immediately behind couplings for
this condition.
• Dried, cracked or broken gaskets.
• Damaged couplings; e.g., out of round.
Sec 7.14

Question 17

When hose testing what size hose must be used to supply manifold ? How many supply lengths is used ?

Answer 17

Stretch a MAXIMUM of two lengths of 2 1/2 “ hose from one way gate to hose test gauge
Sec 7.14 C
ONLY 2 1/2” is used to supply

Question 18

How many lengths total can be tested at once during hose test procedures ?

Answer 18

38!!
Attach hose to outlets of manifold. Up to 6 lengths of hose (300 feet) may be
stretched from each of the 2 1/2 inch gated outlets
Plus 2 used for supplying
Sec 7.14

Question 19

A water soluble marker is used to mark and draw a line around the
circumference of the hose. It should be as close as
possible to the ______ at each coupling. A movement of ____ inch or
more during the pressure test would indicate the male butt and hose are
separating. If this happens, place length OOS.

Answer 19

Male Butt

1/8”
Sec 7.14

Question 20

When hose testing 250 psi shall be maintained for how many minutes ?

Answer 20

5 min!!

Sec 7.14

Question 21

When hose testing place a member on the left or right side of manifold how many feet from hose ?

Answer 21

Left side
15 feet
Sec 7.14

Question 22

Chauffeurs must be aware that during the 5 minute test there is no movement of
water in the pumps. They must check for over heating of the pumps while test
pressure is being applied. This is done by placing a hand on the 4 1/2 inch inlet
on the control panel side of the apparatus. (NOTE: This is the inlet not being
used to supply water). When heat is noted the following steps must be taken to
avoid possible damage to the pumps
What are they ? 1-3

Answer 22

If any of the below options DO NOT correct the heat buildup, shut the pumper
down and discontinue the test. The Fleet Maintenance Division must be notified
if this problem cannot be corrected.
1. The booster tank fill valve should be partially opened with water showing
at the fill pipe in the booster tank. Fully open the tank to pump valve.
This will guarantee a circulation of water around the pumps. Water will
also be relieving from the overflow in the booster tank.
2. Another option is to fully open the bypass cooling valve during the test.
3. A 3rd choice is to open a drain valve on an unused gate and partially open
that gate.
Sec 7.14

Question 23

What is used The hose test gauge or the manifold gauge to monitor hose pressure when testing ?

Answer 23

The hose test gauge, not the manifold gauge, shall be used to monitor hose pressure
Sec 7.14

Question 24

All six drain valves located on the underside of the manifold must be kept in the full open
position (drain) at all times except when the manifold is in use
Agree or Disagree

Answer 24

Agree!!

Sec 7.14