2021 First-Class Fire Engineer Examination "Comprehensive Ability" Daily Practice 8.4

1. Regarding the control and operation of fire water pumps, the following does not meet the requirements of the specification ( ).

A. The automatic inspection of the fire water pump's working status should adopt variable frequency operation, and the regular manual inspection should run at full load at the power frequency and flow out

B. The fire water pump control cabinet should Set up a mechanical emergency pump start function, and ensure that when the control circuit in the control cabinet fails, the person on duty will directly start the fire pump in an emergency

C. The fire water pump control cabinet and the fire water pump are set up in the same space When used, its protection level should not be lower than IP54

D. The automatic switching time of the dual power supply of the fire water pump should not be greater than 2s, and the switching time of the circuit power supply and the internal combustion engine power should not be greater than 15s

2. Among the following settings for the flow and pressure testing devices of fire water pumps, the correct one is ( ).

A. When the flow rate of a single fire water pump is not greater than 25L/S and the design working pressure is not greater than 0.50MPa, the pump unit should reserve flow meter and pressure meter interfaces for measurement

B. The measurement accuracy of the fire water pump flow detection device should be level 0.4, and 75% of the maximum range should be greater than 175% of the design flow value of the largest fire water pump

C. The suction pipe of each fire water pump should be Set up a DN75 water test pipe and take drainage measures

D. The measurement accuracy of the fire water pump pressure detection device should be 0.5, and 65% of the maximum range should be greater than 165 of the maximum design pressure value of a fire water pump. %

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3. In the water supply pipe network, the place where fixed brackets or anti-sway brackets should be installed is ( ).

A. The midpoint of the water distribution pipe with a pipe diameter less than DN50

B. The length of the water distribution main pipe and water distribution pipe, and the water distribution branch pipe exceeds 15m

C. Pipe At the bends, tees and crosses of pipes with a diameter larger than DN40

D. The middle part of the riser

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4. According to the "Firefighting Water Supply and "Technical Specifications for Fire Hydrant Systems" (GB50974), after the installation of the indoor fire hydrant system pipe network is completed. The correct sequence for hydrostatic testing and flushing is ().

A. Strength test? Tightness test? Flushing

B. Strength test? Flushing? Tightness test

C. Flushing? Strength test? Tightness Test

D. Flushing? Tightness test? Strength test

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5. When the fire water supply pipeline is installed through a beam, a ( ) should be set at the beam penetration. .

A. Bracket

B. Anti-sway bracket

C. Fixed bracket

D. Hanger

See the answer on the next page

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