Engine Op's Ch. 7 Hose

Question 1

General Knowledge

The most common sizes of hose carried by engine companies are:

Answer 1

7.2.1
diameter coupling length max working pressure
1 3/4” 1 1/2” 50’ 250 PSI
2 1/2” 2 1/2” 50’ 250 PSI
3 1/2” 3” 50’ 250 PSI

Question 2

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 _____ for identification and are noticeably
heavier than standard couplings and fittings.
Fill in the blank

Answer 2

7.2.3

white

Question 3

The Satellite Water System uses what diameter hose?

Answer 3

7.2.4

The Satellite Water System uses 5 inch large diameter hose (LDH) with 4 1/2 inch couplings.

Question 4

Pursuant to the requirements determined by the Bureau of Operations, each engine company should maintain a minimum of how many lengths of each type of hose?
30-20-10

Answer 4

7.2.5
Each engine company should maintain a minimum of (20) twenty lengths of 1 3/4 inch, (30) thirty lengths of 2 1/2 inch and (10) ten lengths of 3 1/2 inch hose. 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.

Question 5

Each length of hose is marked as follows:
Marking Location
***Marriage Date for Females; Creates Remorse for Males

Answer 5

7.3.1
Hose manufacturer’s name or trademark,Date of manufacture on Both ends of hose, not less
than 4 feet from couplings
Coupling manufacturer’s name or trademark,Date of Issuance to unit on the Female coupling
Company and registry numbers on the Male coupling

Question 6

The date the hose is issued to the company shall be entered where?

Answer 6

7.3.2 & 3
The date of issuance is to be entered in the Office Record Journal
The date of issuance is also the date to be referred to in Department correspondence.

Question 7

The maximum pressure in hose lines should be limited to 250 psi. Only emergency needs which allow for no other corrective action permit the use of higher pump pressures. Pressures in excess of 250 psi can only be ordered by who?

Answer 7

7.5.1

The Incident Commander.

Question 8

To reduce friction loss, keep hoselines as straight, as short, and as free of kinks as possible. Kinks in hoselines can significantly reduce required flows and must be removed as soon as possible. How should kinks be removed?

Answer 8

7.5.5 & 7.5.6
Kinks should be removed manually. Attempting to straighten kinks hydraulically by use of unwarranted pressures is not good practice.

Question 9

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 50 psi, the 1 3/4 inch handline will flow approximately ___ gpm.
Fill in the blank

Answer 9

7.6.1

180 gpm

Question 10

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:
DALLAS

Answer 10

7.6.3
• 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.

Question 11

Coupling hose with two firefighters
• One firefighter holds the hose under the ______ arm, near the male coupling.
• The male coupling is extended, held with two hands about belt high. The male coupling is held steady.
• The second firefighter holds the second length under the ______ arm, close to the female coupling.
• The female coupling is extended to the male, a quarter turn is taken to the left, to seat the coupling, then it is swiveled to the right.
Fill in the blanks

Answer 11

7.7.1

Right, Right

Question 12

The first thread of both couplings is blunted with a ______ cut. This serves a dual purpose; it protects the threads and also makes coupling easy.
b. One lug, on each coupling, male and female, has a cut in it. If the two cuts are lined up, the hose is in position for coupling.

Answer 12

7.7.1 a & b

Higbie

Question 13

Direction of male threads: Always point in the direction of water flow.
True or false

Answer 13

7.7.7
False
Normally point in the direction of water flow.

Question 14

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:
• 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 shall not be driven over unless what action is taken?

Answer 14

7.8.6

• 5-inch hose should not be driven over unless properly bridged.

Question 15

What 2 methods should be considered to free frozen couplings?

Answer 15

7.10.2
• Use the thawing apparatus.
• Heat from the exhaust pipe of the apparatus.

Question 16

Hose on the apparatus is removed and cleaned when?

Answer 16

7.11.1
Hose on the apparatus is removed and cleaned in the Spring and Fall of each year in accordance with Section 13.3.24 of the Regulations.

Question 17

Any hose that will reach __ years in the current calendar year is to be taken out of service
Fill in the blank

Answer 17

7.11.1

10

Question 18

Any hose that will reach 10 years in the current calendar year is to be taken out of service with the company officer immediately notifying who with what information?

Answer 18

7.11.1

The Fire Tools and Equipment Unit via fax the serial numbers, size and length for replacement.

Question 19

No more than ___ lengths of 1 3/4 inch hose shall be used as lead lengths in any hose stretch. Greater friction loss in 1 3/4 inch hose precludes the use of more lengths without the danger of exceeding the maximum permissible working pressure of 250 psi.
Fill in the blank

Answer 19

7.12.3

six (6)

Question 20

Each individual length of hose shall be disconnected and drained prior to reloading. When reloading, each length of hose shall be reconnected when?

Answer 20

7.12.7 K
Just prior to reaching the hose bed. Do not preconnect lengths of hose prior to reaching the hose bed or while they lay in the street. This ensures proper drainage of the hose and prevents ice formation during freezing weather.

Question 21

Company commanders shall establish a method whereby a length of 3 1/2 inch hose can be stretched from what side of the apparatus in the event a hydrant hookup with a standard hydrant connection is not feasible?

Answer 21

7.12.9

From EITHER side

Question 22

As required by Section 13.2.8 of the Regulations, engine companies shall carry not less than ______ lengths of 2 1/2 inch and not less than ______ lengths of 1 3/4 inch hose (rolled or folded) and the necessary fittings to place a line into operation including, but not limited to, appropriate hydrant wrenches, reducers, nozzles, etc.
Fill in the blanks

Answer 22

7.13.1

three, three

Question 23

Each engine company shall ensure that an extra length of 1 3/4 inch hose with nozzle, either rolled or folded, is stored on the apparatus. This hose must be easily accessible so that it can be used for what 2 things?

Answer 23

7.13.1

To replace a burst length or for adding to a short stretch.

Question 24

When rolling a hose:
Place the male butt about __ feet from the female coupling.
fill in the blank

Answer 24

7.13.2 C

3

Question 25

When folding a length of hose.Take the completed folds and turn them over so that the male butt is placed on what side of the folded length?

Answer 25

7.13.3 E

The right of the folded length.

Question 26

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.
GO BMW CAR

Answer 26

7.14 B
• 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.

Question 27

When doing a hose test connect the pumper to the hydrant on what side of the apparatus?

Answer 27

7.14 C

Connect pumper to hydrant using inlet on side of apparatus opposite the control panel.

Question 28

When doing a hose test connect what to the pumper outlet?

Answer 28

7.14 C

Attach one way gate to pumper outlet.

Question 29

Stretch a maximum of two lengths of hose from one way gate to hose test gauge. Hose must be stretched from an outlet which is on the side of apparatus opposite the control panel. This hose is also being tested. Replace it if more hose is to be tested. What size hose can be used to supply the manifold?

Answer 29

7.14.7 & Note

Only 2 1/2 inch hose shall be used to supply the manifold during hose testing operations.

Question 30

Attach hose to outlets of manifold. Up to _ lengths of hose (___ feet) may be stretched from each of the 2 1/2 inch gated outlets
Fill in the blanks

Answer 30

7.14.9
6
300

Question 31

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 male butt at each coupling. A movement of ___ ____or more during the pressure test would indicate the male butt and hose are separating. If this happens, place length OOS.

Answer 31

7.14.11

1/8th inch

Question 32

Place one firefighter on the ____ side of manifold facing the hose at a distance of __ feet from the hose
Fill in the blanks

Answer 32

7.14.19
left
15 feet

Question 33

250 psi shall be maintained for ____ minutes and then gradually reduced to hydrant pressure.
Fill in the blank

Answer 33

7.14.24

five (5)

Question 34

Chauffeurs must be aware of what during the 5 minute test?

Answer 34

7.14 D

That there is no movement of water in the pumps.

Question 35

When all lines have been bled of air, fully close the one way gate. How is pressure built up in the lines while the gate is closed during the hose test?

Answer 35

Notes 3
The one way gate has a small opening in the gate. This opening permits the pressure to build while using a minimum amount of water. This feature will minimize the reaction if a length should burst.

Question 36

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?

Answer 36

Notes 5

When the manifold is in use.