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Pumper DO CDC Final Exam Latest Updated Graded A+
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Pumper DO CDC Final Exam Latest Updated Graded A+
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Pumper D/O CDC Final Exam LatestUpdated Graded A+
"C" in the formula FL= C Q(2) L represents the - ANSWER-Hose diameter coefficient
A hose has a flow rate of 50 gpm with a friction loss of 2 psi. if the flow rate increases to
200 gpm, then the friction loss will increase to - ANSWER-32 psi
A hose has a flow rate of 50 gpm with a friction loss of 2 psi. If the flow rate increases to
200 gpm, then the friction loss will increase to - ANSWER-32 psi
A major advantage of small diameter hoses is their - ANSWER-Ease of relocation and
movement
A priming device works by - ANSWER-Creating a partial vacuum
A pumper has two 300-foot sections of 3-inch hoses with 2 1/2-inch couplings. They are
siamesed into a 200 feet of 5-inch attack line. The attack line that ends in a master
stream with a flow of 350 gpm. Given this hose layout, determine the total pressure loss
for this hose assembly - ANSWER-44 psi
A quantity of 16.66 pounds of water equals - ANSWER-2.0 Gallons
A special purpose nozzle that is often driven through building walls is the - ANSWER-
Piercing Nozzle
All of the following are important reasons for maintaining inspection documentation on a
fire apparatus EXCEPT - ANSWER-Verifying that you are inspecting the correct
apparatus
All of the following are potential water sources for an apparatus fire pump EXCEPT -
ANSWER-A municipal storm drain
All of the following statements about driving a fire apparatus through areas of restricted
horizontal and vertical clearances are true EXCEPT - ANSWER-Use the appropriate
turn signal
All of the following statements about static sources are true EXCEPT - ANSWER-The
static water source that is closest to the incident should be always used first
Allowing the fire apparatus engine to idle over an extended period of time can lead to all
of the following EXCEPT - ANSWER-Engine Fatigue
, An important consideration when determining the position of a fire apparatus is the -
ANSWER-Method of attack
As salt water or water containing certain chemicals can corrode the apparatus pump,
you should - ANSWER-Flush the pump with fresh water after using it
Before driving over a guarded railroad crossing during an emergency response -
ANSWER-Look both right and left and proceed cautiously
Bouncing water off the inside walls of the nozzle bore to create a fog pattern is called -
ANSWER-Periphery Deflection
Calculate the capacity of this pool. The average depth is five feet. - ANSWER-225,000
gallons
Class B foams on hydrocarbons can be used in concentrations of up to: - ANSWER-3%
Determine the approximate TPL for a hose assembly in which there is 500 Feet of a 4-
inch supply line wyed into two, 2 1/2-inch attack lines that are 200 feet long. Each attack
line is flowing 250 gpm - ANSWER-60 PSI
Determine the PDP for a siamesed layout in which there is an attack line of 200-feet
with a 1 1/4-inch solid stream nozzle operating at 45 psi. The friction loss from supply
hoses is 30 psi. The friction loss from the attack hose is 25 psi. In addition, there is an
elevation gain of 40 feet between pump and nozzle. Total flow is 350 gpm. - ANSWER-
NOT SURE
Determine the TPL for a hose assembly in which 400 feet of 5-inch hose is wyed into on
200-foot section of 2 1/2-inch hose and one 300-foot section of 2 1/2-inch hose. Each
attack hose is flowing at 200 gpm - ANSWER-39 psi
During service testing, it is important that the water temperature be between -
ANSWER-35 F and 90 F
Each of these cups is filled with water to its top. Identify the cup with the least amount of
pressure per square inch at the bottom of the liquid - ANSWER-Option C
Foam in a foam induction system is drawn into the system through the effect of -
ANSWER-A Venturi
Fog nozzles are best used to aerate - ANSWER-All Class A foams.
For safety reasons, hand lines with solid stream nozzles cannot really be operated
above - ANSWER-50psi
Hard suction hoses are best used - ANSWER-For drafting from static water sources
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