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82 Cards in this Set
- Front
- Back
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All but which of the following influence the movement of water at fires? A) Water source. B) Hydrant tools. C) Pumper. D) Hose. |
Hydrant tools. |
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The pressure of a hydrant at rest is - A) Static pressure. B) Residual pressure. C) Kinetic pressure. D) Pump pressure. |
Static pressure. |
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The pressure in the hydrant with water flowing from the hydrant through the pump is - A) Hydrant pressure. B) Residual pressure. C) Kinetic pressure. D) Pump pressure. |
Residual pressure. |
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Firefighter Ray says that a compound gauge is used to measure the static pressure with the hydrant charged to the pumper with all discharge gates closed. Firefighter Dennis says that a compound gauge is used to measure the residual pressure with at least one discharge gate open and the proper pressure being pumped to the attack line. Who is correct? A) Firefighter Ray. B) Firefighter Dennis. C) Both are correct. D) Neither are correct. |
Both are correct. |
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Your engine makes a hydrant at the scene of a structure fire. Handlines have been deployed, yet have not been charged. What would you expect to be reading from the compound gauge? A) Hydrant pressure. B) Pump pressure. C) Static pressure. D) Residual pressure. |
Static pressure. |
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Which of the following statements is not true? A) Static pressure is the best indication of available water supply. B) After the lines have been charged the operator must continually watch to compound gauge closely. C) Once a line is open, the operator can monitor residual pressure with the compound gauge. D) The difference between static and residual pressure provides the true measurement of water supply. |
Static pressure is the best indication of available water supply. |
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A drop of 5% from static pressure to the residual pressure indicates that __ equal parts equivalent to the amount being delivered can be supplied by a water main system. A) 1 B) 2 C) 3 D) 4 |
3 |
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A drop of __ from static pressure to the residual pressure indicates that 2 equal parts equivalent to the amount being delivered can be supplied by a water main system. A) 8% B) 10% C) 12% D) 15% |
10% |
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A drop of __ from static pressure to the residual pressure indicates that only one more equal part equivalent can be supplied by a water main system. A) 12% B) 15% C) 18% D) 20% |
20% |
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When drafting from a static water source is the only way to assure an adequate water supply, which of the following would be considered essential? A) An adequate amount of hard suction be supplied on the pumper. B) A properly size strainer be selected to match the water source. C) A fundamental understanding of advantages and inherent risks of the operation through preincident planning. D) Proper positioning of the apparatus at the drafting sight, |
A fundamental understanding of advantages and inherent risks of the operation through preincident planning. |
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Ideally, the first arriving engine at the scene of a structure fire should begin the fire attack using water supplied by - A) The closest hydrant. B) The closest static water supply. C) The closest pumper. D) Its own tank. |
Its own tank. |
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Which of the following are especially vulnerable to water supply problems? A) Dead-end mains. B) Gridded mains. C) Cross mains. D) Large diameter mains. |
Dead-end mains. |
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Mobile water supply apparatus normally carry from 1000 to __ gallons of water. A) 2000 B) 2500 C) 3000 D) 3500 |
3500 |
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Apparatus carrying __ gallons of water or more with a fire pump are generally referred to as tankers. A) 1000 B) 1500 C) 2000 D) Over 2000. |
1000 |
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Pumper-tankers should not be used for - A) Fire attack. B) Pumping water from a water source to pumpers on the fireground. C) Shuttling water from a water source to the fire. D) All the above. |
Shuttling water from a water source to the fire. |
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Vehicles carrying 1000 gallons of water and equipped with a small PTO-driven pump are called - A) Pumpers. B) Pumper-tankers. C) Tankers. D) Tenders. |
Tenders. |
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A pumper is a piece of fire apparatus with a permanently mounted fire pump capable of pumping at least - A) 500 gpm. B) 750 gpm. C) 1000 gpm. D) 1200 gpm |
750 gpm. |
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The pumping system of an engine must be capable of delivering __ of the rated capacity at 150 psi (1000 kPa) net pump pressure. A) 50% B) 65% C) 75% D) 100% |
100% |
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The pumping system of an engine must be capable of delivering __ of the rated capacity at 200 psi (1400 kPa) net pump pressure. A) 50% B) 65% C) 70% D) 100% |
70% |
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The pumping system of an engine must be capable of delivering __ of the rated capacity at 250 psi (1700 kPa) net pump pressure. A) 50% B) 65% C) 70% D) 100 |
50% |
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Since pumpers are rated from draft, what would be the discharge of a pumper that can draft 1,250 gpm? A) 2,500 gpm. B) 625 gpm. C) 1,250 gpm. D) 1000 gpm. |
1,250 gpm. |
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Under what circumstances can a pumper exceed its rated capacity? A) When they receive water under positive pressure. B) When being supplied by another pumper at a hydrant. C) When being supplied directly from a hydrant that delivers sufficient water. D) All the above. |
All the above. |
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Pumper intakes must have __ threads if the apparatus is to be used in the United States. A) Female NH. B) Male NH. C) Universal NH. D) Sexless NH |
Male NH. |
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When a pumper is working from a hydrant, a common procedure is to hook up to the hydrant using - A) 10 foot hard suction. B) 8 to 10 foot soft suction hose. C) 10 to 20 foot soft suction hose. D) 25 to 50 foot soft suction hose. |
10 to 20 foot soft suction hose. |
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A pump must not be operated above __ of its rated peak speed for any length of time, or the engine, drive train, or pump may be damaged. A) 75% B) 80% C) 90% D) 100% |
80% |
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What is the flow rate when the residual pressure reaches zero? A) 0 B) 1/2 the static pressure. C) 75% of the static pressure. D) Nearly the same as the static pressure. |
0 |
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Pump operators should maintain a residual pressure of __ or more if possible. A) 20 to 25 psi. B) 25 to 30 psi. C) 35 to 40 psi. D) 40 to 50 psi |
20 to 25 psi. |
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Except under extreme conditions, residual pressure should not be allowed to drop below - A) 10 psi. B) 20 psi. C) 30 psi. D) 40 psi |
10 psi. |
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Under what conditions can a pump operator shut down a hoseline or reduce the flow rate without the knowledge or consent of the personnel operating the hoseline? A) When the residual pressure drops below 20 psi. B) When the residual pressure drops below 10 psi. C) When it becomes necessary to move the apparatus. D) Under no condition. |
Under no condition. |
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Increasing residual pressure can be accomplished by which of the following methods? A) Shutting down unnecessary hoselines. B) Half gating hoselines. C) Reducing tip sizes to decrease flows. D) All the above. |
All the above. |
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The residual pressure at a hydrant is decreased by all but which of the following? A) Decreases in the pumper discharge pressure. B) Increases in discharge volume. C) Increases in speed. D) Increases in pumper discharge pressure. |
Decreases in the pumper discharge pressure. |
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Friction loss in a hoseline varies depending on all but which of the following? A) Construction and design of the hose. B) Roughness of the lining. C) The hose internal diameter. D) The size of the connection at the hydrant. |
The size of the connection at the hydrant. |
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Which of the following statements is not true? A) Fire hose is a flexible conduit used to deliver water at a fire. B) The diameter of the hose and the length of the hoseline from the pumper to the nozzle directly affect the water-moving capability of the system. C) The larger diameter of the hoseline, the less friction loss there is for a given rate. D) The greater the flow-rate in a given hose, the less friction loss. |
The greater the flow-rate in a given hose, the less friction loss. |
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Supply hose is designed for moving water - A) Between a pressurized water source and a pump supplying attack lines. B) To hoseline nozzles. C) To portable hydrants. D) To standpipe and sprinkler systems. |
Between a pressurized water source and a pump supplying attack lines. |
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Attack hose is designed for use at operating pressures up to at least - A) 250 psi. B) 275 psi. C) 300 psi. D) 325 psi. |
275 psi. |
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An LDH has a diameter of - A) 3 1/2 inch or larger. B) 4 inch or larger. C) 4 1/4 inch or larger. D) 5 inch or larger. |
3 1/2 inch or larger. |
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What is the most common size LDH in the fire service? A) 3 1/2 - 4 inch. B) 4 - 4 1/2 inch. C) 4 - 5 inch. D) 5 inch. |
4 - 5 inch. |
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Attack hose is designed to convey water to all but which of the following? A) Master stream appliances. B) Pumpers. C) Manifolds. D) Distributor nozzles. |
Pumpers. |
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The standard hose of the fire service nationally is the - A) 1 1/2 inch hose. B) 1 3/4 inch hose. C) 2 1/2 inch hose. D) 4 inch hose. |
2 1/2 inch hose. |
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A 2 1/2 inch supply line should not be used to deliver more than - A) 275 gpm. B) 300 gpm. C) 325 gpm. D) 350 gpm |
350 gpm. |
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What is the friction loss in a 2 1/2 inch hoseline per 100 feet, pumping at 350 gpm? A) 10 psi. B) 20 psi. C) 25 psi. D) 30 psi. |
25 psi. |
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You are pumping water from one engine to another at 175 psi over a 1000 foot hose lay. Which of the following would have the greatest available flow? A) A single 2 1/2 inch hose. B) Two 2 1/2 inch hose. C) One 3 inch hose. D) They would all be flowing an equal amount of water. |
Two 2 1/2 inch hose. |
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You are pumping water from one engine to another at 175 psi over a 1000 foot hose lay. Which hose lay would yield the greatest friction loss? A) A single 2 1/2 inch hose. B) Two 2 1/2 inch hose. C) One 3 inch hose. D) The friction loss is identical for all three. |
The friction loss is identical for all three. |
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Which of the following statements is true? A) As long as the total flow of water and the hoseline length remain the same, an increase in the number of supply lines of a given diameter will decrease the required pump pressure. B) Increasing the diameter of the hose, decreases the friction loss. C) Increasing the diameter of the hose decreases the number of hoselines needed to move a given amount of water. D) All the above. |
All the above. |
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A single 4 inch hoseline will deliver a volume of water approximately the equivalent to - A) Two and one half 2 1/2 inch hose. B) Three and one half 2 1/2 inch hose. C) Four 2 1/2 inch hose. D) Four and one half 2 1/2 inch hose. |
Three and one half 2 1/2 inch hose. |
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A 4 inch supply line is capable of flowing - A) 500 gpm. B) 750 gpm. C) 880 gpm. D) 920 gpm. |
880 gpm. |
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A 5 inch supply line is capable of flowing - A) 900 gpm. B) 950 gpm. C) 1200 gpm. D) 1400 gpm. |
1400 gpm. |
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Which of the following statements is true. A) The size of the supply line used at a fire should be governed by the size of the fire. B) To conserve water the smallest diameter supply line should always be the first choice when laying out supply lines at a fire. C) At a working fire the size of the supply line should start out small, and larger capacity lines be added later if necessary. D) If LDH is available, it should always be used at a fire |
If LDH is available, it should always be used at a fire. |
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A first-due pumper approaching the fire from a water source should - A) Perform a forward lay. B) Perform a reverse lay. C) Should proceed to the fire and initiate fire attack without laying hose. D) Should stage at the water source and prepare to supply the second pumper coming in. |
Perform a forward lay. |
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As a rule, a pumper at a hydrant should initially begin pumping to a unit at the fire at a pump pressure of - A) 100 psi. B) 125 psi. C) 150 psi. D) 175 psi. |
100 psi. |
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Excessively long hose lays, those exceeding __ may require relay pumping operations to counter act the effect of friction loss. A) 500 ft. B) 1000 ft. C) 1500 ft. D) 2000 ft. |
1000 ft. |
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During relay pumping supply lines should be charged - A) As each pumper enters the relay. B) From the fire back to the source. C) From the source to the fire. D) Only after all pumpers have entered the relay. |
From the source to the fire. |
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During relay pumping, after a pumper begins discharging water, the pump operator must - A) Keep the discharge gates fully open. B) Keep the discharge gates fully closed. C) Partially close the discharge gates. D) Throttle down the pump if the discharge gauge begins to fall. |
Keep the discharge gates fully open. |
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When should relay pumping begin. A) As soon as the first engine enters into the relay. B) When all the pumpers are in position. C) When the water source has been secured. D) After the relay pumpers are all in position and the supply lines have been hooked up. |
After the relay pumpers are all in position and the supply lines have been hooked up. |
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At the start of a relay pumping operation. all pumpers in the relay should be set to pump __ to the pumper at the fire. A) 100 psi. B) 150 psi. C) 175 psi. D) 200 ps |
150 psi. |
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In a relay pumping operation, incoming pressure to the next pumper should never drop below - A) 10 psi. B) 15 psi. C) 20 psi. D) 25 psi. |
20 psi. |
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WHAT ARE THE THREE FACTORS THAT INFLUENCE THE MOVEMENT OF WATER?
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WATER SOURCE
PUMPER HOSE |
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WHAT ARE SOME EXAMPLES OF WATER SOURCES
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WATER MAIN SYSTEMS
STATIC WATER SOURCES APPARATUS WATER TANKS MOBILE WATER SUPPLY APPARATUS |
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VEHICLES CARRYING OVER 1000 GALLONS OF WATER OR MORE WITH A FIRE PUMP ARE GENERALLY REFERRED TO AS _____________
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TANKERS
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SHOULD A TANKER BE USED FOR SHUTTLING WATER TO A FIRE SCENE?
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NO
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VEHICLES CARRYING 1000 GALLONS OF WATER OR MORE WITHOUT A FIRE PUMP, OR USING A SMALL PTO DRIVEN PUMP ARE CALLED _______________ AND ARE SPECIFICALLY USED TO DO WHAT?
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TENDERS
CARRY WATER TO A FIRE |
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WHAT IS A PUMPER?
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A PIECE OF FIRE APPARATUS WITH A PERMANENTLY MOUNTED FIRE PUMP OF AT LEAST 750 GALLONS, A WATER TANK, AND A HOSE BODY WHOSE PRIMARY PURPOSE IS TO COMBAT STRUCTURAL AND ASSOCIATED FIRES.
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WHAT IS A PUMPERS PRIMARY PURPOSE?
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TO COMBAT STRUCTURAL AND ASSOCIATED FIRES
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PUMPERS Must be capable of delivering 100% of rated capacity at ________psi
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Must be capable of delivering 100% of rated capacity at 150psi
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PUMPERS Must be capable of delivering 70% of rated capacity at ________psi NET PUMP PRESSURE
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200 PSI
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PUMPERS Must be capable of delivering 50% of rated capacity at ________psi NET PUMP PRESSURE
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250
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Pumpers are rated from ____________. Their ability to deliver 1500gpm means _________________
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Pumpers are rated from draft. Their ability to deliver 1500gpm means the pumper can draft and discharge 1500gpm from a static water source.
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Typically, have one 2–1/2” discharge for each ______________gpm of rated capacity.
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Typically, have one 2–1/2” discharge for each 250gpm of rated capacity.
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**The pump should not be operated above ________% of its rated peak speed for any length of time. (If there is an increase in engine pump speed with no accompaniment of an increase in discharge pressure then the pump is moving as much water as it can.)
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**The pump should not be operated above 80% of its rated peak speed for anylength of time. (If there is an increase in engine pump speed with no accompaniment of an increase in discharge pressure then the pump is moving as much water as it can.)
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Hose–
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Hose–the flexible conduit used to convey water
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Attack Hose – designed for use at operating pressures up to at least ____________psi
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Attack Hose – designed for use at operating pressures up to at least 275psi
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Supply Hose – can be used to supply ____________
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Supply Hose – can be used to supply attack lines, master stream appliances, portable hydrants, manifolds and standpipe or sprinkler systems
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** Whenever Supply hose is used for these appliances a ______________ with a maximum setting of ___________psi should be used.**
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** Whenever used for these appliances a pressure relief device with a maximum setting of 200psi should be used.**
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*The standard hose of the fire service nationally is the ____________ diameter line.
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*The standard hose of the fire service nationally is the 2–1/2” diameter line.
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NFPA 1961
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– Standard on Fire Hose (defines an LDH as a hose with an inside diameter of 3–1/2” or larger.)
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NFPA 1961 defines an LDH as a hose with an inside diameter of __________" or larger.)
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(defines an LDH as a hose with an inside diameter of 3–1/2” or larger.)
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when estimating attack lines, you should first obtain the difference in _______________ pressure and ___________________
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static and residual
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A drop of about 5% from the static pressure to the residual pressure indicates ______________
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A drop of about 5% from the static pressure to the residual pressure indicates that 3 equal parts equivalent to the amount being delivered can be supplied by the water main into the system.
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A drop of about 10% from the static to residual indicates what?
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A drop of about 10% from the static to residual indicates 2 equal parts can be supplied
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A drop of 20% from the static to the residual indicates what
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A drop of 20% from the static to the residual indicates one more equal part can be delivered from the water to the main system.
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The maximum capacity of a relay operation is determined by what?
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The maximum capacity of a relay operation is determined by the smallest pumper and/or the smallest supply hose used in the relay.
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At the start of the relay operation, all pumpers in the line should be set to pump _____________ psi to the pumper at the fire.
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At the start of the relay operation, all pumpers in the line should be set to pump 150 psi to the pumper at the fire.
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