Ch. 10 Operating fire pumps

Question 1

Ch. 10 pg. 338
When transitioning to the external water supply. the D/O connect the supply line into an appropriate intake of the fire pump. the next step would be:
A. Open the bleeder valve on the gated intake.
B. make the connection to an intake with a closed gate valve.
C. Connect to the hydrant.
D. Open the Tank Fill valve

Answer 1

B. make the connection to an intake with a closed gave valve.

this really makes zero since but it is the next bullet point.

Question 2

Ch. 10. pg 339 
When operating from a pressurized source. The intake pressure needs to remain above: 
A. 30 psi. 
B. 30 % static pressure 
C. 20 psi 
D. 20 % static pressure

Answer 2

C. 20 psi.

Under 20 psi bad shit happens.

Question 3

ch. 10 pg. 341.
A forward lay consist of stopping at the hydrant, dropping the end of one or more supply hose lines at the hydrant, and then proceeding to the fire location. In what cases may a second pumper by necessary in a forward lay:
A. Low hydrant pressure, long hose lay
B. elevation, and low hydrant pressure
C. necessary flow requirements, elevation
D. elevation, or length of the hose lay, flow requirements

Answer 3

D. elevation, or length of the hose lay, flow requirements

Question 4

Ch. 10 pg. 348

additional water available from a hydrant, there are several methods are available for making this determination: (3)

Answer 4

percentatage method.
First digit method
Squaring-the-lines method.

Question 5

Ch. 10 pg. 348
percent drop method.
percent drop = (static-Residual) (100) / static

how much can be added with a 12% drop.

Answer 5

2 times the amount being delivered.

10 or less, three additional lines with the same flow as the line being supplied may be added.
11-15% two lines may be added, and for 16-25 % one line.
when the result is over 25 % more water may be available, but not as much as is flowing through the first line.

Question 6

ch. 10 pg. 344
Executing a reverse lay is a common method for setting up a water supply operation relay pumping operation using ____________ as a supply line.

Answer 6

medium diameter hose.

Question 7

Ch. 10. pg 335
The D/O must first make the pump operational and then prepare to use at least one of three sources of water to supply the pumping operation. (3)

Answer 7

onboard water tank
pressurized water source
static water source.

Question 8

p.344 Reverse Lay
+The reverse lay is the most __ method for supplementing hydrant pressure or performing drafting operations as well as for relay pumping using___ diameter hose.

Answer 8

Direct

medium

Question 9

p.344-345
+Check valve in tank to pump line
-Pumpers built before __ may not have one.

Answer 9

1991

Question 10

p.348 Percentage Method
Available water from hydrant

Percent Drop=(Static-Residual)(100)/Static

1. 10 or less=
2. 11-15=
3. 16-25
4. 25 or greater=

Answer 10

1. 3 lines
2. 2 lines
3. 1 line
4. Water may be available but not as much as first line

Question 11

ch 10 pg. 338
when operating at an incident requiring more water than is carried aboard the apparatus it is necessary to transition to an external water supply before depleting the onboard tank. To begin the transition to external water the D/O should:
three steps

Answer 11

• connect the supply line into an appropriate intake of the fire pump
• make the connection to an intake with a closed gate valve.
• open the bleeder valve on the gated intake so that air can escape ahead of the water supply.

Question 12

ch 10 pg. 350 When using the squaring the lines method. the D/O uses the multiplication factor of the number of lines squared. With this method each time the flow rate is doubled:
A. The pressure drop in the system is doubled
B. the pressure drop in the system is squared
C. the pressure drop in the system is 15%
D. the pressure drop in the system is quadrupled.

Answer 12

D. the pressure drop in the system is quadrupled.