According to the property management records of the building, the startup times of the pressure stabilizing pump are 20 times/h.
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According to the above materials, answer the following questions. (*** 18, 2 points for each question, 2 or more options for each question meet the meaning of the question, and there is at least one mistake. Wrong choice, this question does not score; Choose one less item, and add 0.5 points for each item)
1. Among the following design schemes of fire water supply and fire hydrant system in this building, () meets the specification requirements.
A indoor and outdoor fire hydrant systems share the fire pool.
B. The indoor fire hydrant system adopts temporary high-pressure fire water supply system, and the high-level water tank stabilizes the pressure.
C independent fire water supply pipe network system shall be set for indoor and outdoor fire hydrant system.
D Indoor fire hydrant system is equipped with air pressure tank, without water hammer elimination facilities.
E. Indoor fire hydrant system adopts temporary high-pressure fire water supply system with stabilized pressure pump.
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2. In the design scheme of indoor fire hydrant in the following buildings, the correct one is ().
A. The dynamic pressure at the orifice of indoor fire hydrant is not less than 0.35MPa, and the water column enriched by fire hose is calculated as 13m.
B, there is no indoor fire hydrant in the front room of the fire elevator.
C The minimum protection radius of indoor fire hydrants is 29.23m, and the distance between fire hydrants is not more than 30m.
D. indoor fire hydrants adopt pressure-reducing and pressure-stabilizing fire hydrants.
E the roof test fire hydrant is located in the water tank room.
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3. The following building indoor fire hydrant system design scheme, does not conform to the specification is ().
A. indoor fire hydrant system adopts water supply partition.
B a low-voltage switch is arranged on the outlet pipe of the indoor hydrant water pump.
C. centrifugal pumps are used for fire fighting.
D each fire pump is equipped with a set of flow and pressure testing device in the fire pump room.
E fire pump adapters are arranged along the curtain wall.
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4. The following building water supply facilities design scheme, the correct one is ().
A heating and antifreezing measures should be taken between high-level fire water tanks, and the indoor temperature should be designed as 10℃.
B. the high-level fire water tank is made of reinforced concrete.
C. The design effective capacity of high-level fire water tank is 50m?
D the valves on the inlet and outlet pipes of the high-level fire water tank shall be signal valves.
E. a high-level water tank and a pressure stabilizing pump are arranged between the roof water tanks, and the flow rate of the pressure stabilizing pump is 0.5l/s.
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5. In the following design scheme of fire hydrant water pump control in this building, () does not conform to the specifications.
A the fire pump is directly and automatically controlled by the flow switch on the outlet pipe of the high water tank.
B. In case of fire, the fire pump will be started directly at power frequency, and the fire pump will keep running at power frequency.
C. The fire pump shall be provided with the start-stop control button of the protection device locally.
D the fire pump is directly and automatically controlled by the pressure switch signal of the alarm valve.
E. the fire hydrant button signal directly starts the fire pump.
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6. Determine the main technical parameters of building fire pump, the factors that should be considered are ().
A. Design process of indoor fire hydrant
B. Diameter of indoor fire hydrant
C. Anti-seismic technical measures for fire pumps
D. fire pump control mode
E. elevation of fire hydrant for experiment and water level of fire pool.
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7. The reasons for the frequent start and stop of the pressure stabilizing pump in the indoor fire hydrant system of the building are ().
A. the water leakage of the pipe network exceeds the design value.
B the pressure water tank matched with the pressure stabilizing pump can effectively store 200L.
C. failure of pressure switch or control cabinet
D. the pressure stabilizing pump is located on the roof.
E. Improper selection of pressure stabilizing pump
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8. The practice of building fire hydrant system construction is correct ().
A. The fire hydrant control valve adopts groove valve or flange valve.
B, the steel belt end of the transition joint of the steel wire mesh skeleton plastic composite pipe is welded with the steel pipe.
C. When hot-dip galvanized steel pipes for indoor fire hydrant pipes are connected by flanges, they shall be galvanized twice.
D indoor fire hydrant overhead pipeline adopts steel wire mesh skeleton plastic composite pipe.
E. When the suction pipe is connected with variable diameter, the eccentric reducer is adopted, and the top of the pipe is butted.
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9. In the following fire water supply design scheme of this building, () does not conform to the specifications.
A. Set a fire pool water intake at a distance of 18m from the building.
The fire pool water pump room is located in the basement.
C the height difference between the ground of the fire pool and the outdoor ground is 8m.
D three municipal fire hydrants within the range of 5~ 150m from the outer edge of the building are included in the number of outdoor fire hydrants in the building.
E. the outdoor fire hydrant adopts wet ground fire hydrant.
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See the next page for the answer.
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