Chapter Exercises Exercises for Comprehensive Capability Automatic Sprinkler System
1. An automatic sprinkler system with 300 closed nozzles installed. During the pre-installation inspection of the components, the sealing performance test shall be performed for the closed nozzle. Only the nozzles () should be extracted for the tightness test.
A.3
B.4
C.5
D.6
Answer C
Analyze the sealing test of the closed nozzle. It is required to randomly select 1% from each batch of on-site nozzles, and not less than 5 as test nozzles. When the test of one sprinkler fails, a further 2% and no less than 10 sprinklers will be selected to repeat the test.
2. In the pre-installation inspection of the components of the automatic sprinkler system, the sealing performance test shall be performed on the closed nozzle. The test pressure of the sealing performance test is () MPa, and the pressure holding time is not less than 3 min.
A.1
B.2
C.3
D.4
Answer C
The test pressure of the analysis of the sealing performance test of the closed nozzle is 3MPa, and the holding time is not less than 3min.
3. During the pre-installation inspection of the components of the automatic sprinkler system, the on-site inspection of the sprinkler requires that the color mark of the glass ball nozzle corresponds to the corresponding nominal operating temperature, the glass ball color code is red, and the corresponding nominal operating temperature is ().
A.57
B.68
C.79
D.93
Answer B
The color scale of the analytical nozzle glass ball is red, and the corresponding nominal operating temperature is 68.
4. The automatic sprinkler system is used to control the overpressure caused by the large difference in building height. Usually, the water supply is partitioned or installed on the corresponding pipe section of the system to control the static pressure of the pipeline.
A. Drain valve
B. Pressure switch
C. Alarm valve group
D. Pressure reducing valve
Answer D
Analysis of automatic sprinkler system usually uses district water supply or installs a pressure reducing valve on the corresponding pipe section of the system to control the static pressure of the pipeline.
5. The alarm valve group of the automatic sprinkler system is installed according to the requirements, and its installation quality is controlled by technical inspection. The following alarm valve group installation does not meet the requirements is ().
A. The alarm valve group is installed vertically on the water distribution main
B. The water flow identification of the water source control valve and alarm valve group is consistent with the system water flow direction
C. The height of the bottom edge of the alarm valve body from the indoor floor is 1.2m; the distance between the side and the wall is not less than 0.5m
D. When the alarm valve group is installed indoors, it is not advisable to add drainage facilities on the indoor ground
Answer D
When the analytical alarm valve group is installed indoors, drainage facilities should be added to the indoor ground.
6. In the pre-installation inspection of the automatic water spray system components, it is required to randomly select () nozzles (with the protective cap removed) to check the quality deviation.
A.3
B.4
C.5
D.6
Answer A
Analyze the pre-installation inspection of automatic sprinkler system components, which requires randomly selecting 3 nozzles for quality deviation inspection.
7. In addition to the main components such as the sprinkler head and alarm valve group, the automatic sprinkler system also includes pressure switches, water flow indicators, terminal water test devices and other components. Before installation, the system components mainly inspect the appearance and functions of the site. Among them, the sealing performance of the terminal water test device is tested, the test pressure is () times of the rated working pressure, the pressure holding time is 5min, the water test valve of the terminal water test device is closed, and there is no leakage of the components of the terminal water test device at the end of the test.
A.1.1
B.1.2
C.1.3
D.1.4
Answer A
Analyze the sealing performance of the water test device at the end of the test. The test pressure is 1.1 times the rated working pressure.
8. After the pressure test and flushing of the automatic sprinkler system are completed, the sprinklers should be installed; before installation, consult the fire design documents to determine the types and specifications of the sprinklers in different places of use. Among them, when the width of the beam, ventilation duct, exhaust pipe and bridge is greater than () m, a sprinkler is added below the ventral surface.
A.1.1
B.1.2
C.1.3
D.1.4
Answer B.
Analysis When the sprinkler is installed in the automatic sprinkler system, when the width of the beam, ventilation pipe, exhaust pipe and bridge is greater than 1.2m, a sprinkler is added below the ventral surface.
9. After the pressure test and flushing of the automatic sprinkler system are completed, the sprinklers should be installed; before installation, consult the fire design documents to determine the types and specifications of the sprinklers in different places of use. The following does not meet the requirements for the installation of nozzles ().
A. Use special tools to install the spray head, it is strictly prohibited to use the frame of the spray head to twist
B. If the frame of the spray head and the splash plate are deformed and the damage of the original is released, replace the spray head with the same specifications and models
C. When the nozzle is installed, the nozzle can be disassembled and modified for aesthetic requirements
D. When the nominal diameter of the nozzle is less than 10mm, install a filter on the system water distribution main pipe and water distribution pipe
Answer C
When installing the nozzle, it is not allowed to disassemble and modify the nozzle, and it is strictly forbidden to attach any decorative coating to the nozzle.
10. The alarm valve group of the automatic sprinkler system is installed vertically on the main water distribution pipe, and the water flow identification of the water source control valve and alarm valve group is consistent with the system water flow direction. The installation sequence of the alarm valve group is ().
A. Water source control valve-alarm valve-auxiliary pipeline of alarm valve
B. Water source control valve-alarm valve auxiliary pipeline-alarm valve
C. Alarm valve-water source control valve-auxiliary pipeline of alarm valve
D. Alarm valve—alarm valve auxiliary pipeline—water source control valve
Answer A
Analyze the installation sequence of the alarm valve group: first install the water source control valve and alarm valve, and then connect the auxiliary pipeline of the alarm valve.
11. In the automatic sprinkler system, the following () belongs to the closed automatic sprinkler system.
A. Wet automatic sprinkler system
B. Dry sprinkler system
C. Rain system
D. Water curtain system
E. Pre-action automatic sprinkler system
Answer ABE
Analysis of closed automatic sprinkler system includes wet automatic sprinkler system, dry automatic sprinkler system and pre-acting automatic sprinkler system, etc.
12. During the periodic inspection and annual inspection of the automatic sprinkler system, for the system failure found in the inspection, the cause of the failure should be analyzed in time to eliminate the failure and ensure that the system is intact and effective. The main reasons for the leakage of the wet alarm valve group include ().
A. The drain valve is not completely closed
B. The flap seal is intact
C. Leakage of the pipeline connection on the system side
D. Alarm pipeline test control valve leakage
E. There is an unsealed state between the disc assembly and the valve seat due to deformation or dirt and debris blocking
Answer ACDE
Analyze the reasons for the leakage of the wet alarm valve group mainly including the drainage valve is not completely closed, the valve flap seal is aged or damaged, the system side pipeline interface leaks, the alarm pipeline test control valve leaks, and the deformation between the valve flap assembly and the valve seat Or dirt, debris blocking the appearance of an unsealed state.
13. The failure of components of the sprinkler system is mainly common in the alarm valve group and related components. The following possible reasons why the rain alarm valve of the automatic sprinkler system cannot enter the waiting state are ().
A. There is a problem with the reset device
B. The water supply control valve in front of the pre-action device is not open
C. The alarm valve group has not been debugged to the service state according to the installation and commissioning instructions
D. The control valve of the test pipeline is normally open by mistake
E. There is a problem with the water quality of fire fighting water, and the impurities block the filter on the pipeline of the diaphragm chamber
Answer ACE
Analyze that the rain alarm valve of the automatic sprinkler system cannot enter the servo state. There are problems with the reset device, the alarm valve group has not been debugged to the servo state according to the installation and commissioning instructions, and there is a problem with the fire water quality. On the filter.
If you want to know more exciting content of fire engineer, you can click the test guide and review materials in the custom menu of the headline of 'You Lu Fire Engineer'
A.3
B.4
C.5
D.6
Answer C
Analyze the sealing test of the closed nozzle. It is required to randomly select 1% from each batch of on-site nozzles, and not less than 5 as test nozzles. When the test of one sprinkler fails, a further 2% and no less than 10 sprinklers will be selected to repeat the test.
2. In the pre-installation inspection of the components of the automatic sprinkler system, the sealing performance test shall be performed on the closed nozzle. The test pressure of the sealing performance test is () MPa, and the pressure holding time is not less than 3 min.
A.1
B.2
C.3
D.4
Answer C
The test pressure of the analysis of the sealing performance test of the closed nozzle is 3MPa, and the holding time is not less than 3min.
3. During the pre-installation inspection of the components of the automatic sprinkler system, the on-site inspection of the sprinkler requires that the color mark of the glass ball nozzle corresponds to the corresponding nominal operating temperature, the glass ball color code is red, and the corresponding nominal operating temperature is ().
A.57
B.68
C.79
D.93
Answer B
The color scale of the analytical nozzle glass ball is red, and the corresponding nominal operating temperature is 68.
4. The automatic sprinkler system is used to control the overpressure caused by the large difference in building height. Usually, the water supply is partitioned or installed on the corresponding pipe section of the system to control the static pressure of the pipeline.
A. Drain valve
B. Pressure switch
C. Alarm valve group
D. Pressure reducing valve
Answer D
Analysis of automatic sprinkler system usually uses district water supply or installs a pressure reducing valve on the corresponding pipe section of the system to control the static pressure of the pipeline.
5. The alarm valve group of the automatic sprinkler system is installed according to the requirements, and its installation quality is controlled by technical inspection. The following alarm valve group installation does not meet the requirements is ().
A. The alarm valve group is installed vertically on the water distribution main
B. The water flow identification of the water source control valve and alarm valve group is consistent with the system water flow direction
C. The height of the bottom edge of the alarm valve body from the indoor floor is 1.2m; the distance between the side and the wall is not less than 0.5m
D. When the alarm valve group is installed indoors, it is not advisable to add drainage facilities on the indoor ground
Answer D
When the analytical alarm valve group is installed indoors, drainage facilities should be added to the indoor ground.
6. In the pre-installation inspection of the automatic water spray system components, it is required to randomly select () nozzles (with the protective cap removed) to check the quality deviation.
A.3
B.4
C.5
D.6
Answer A
Analyze the pre-installation inspection of automatic sprinkler system components, which requires randomly selecting 3 nozzles for quality deviation inspection.
7. In addition to the main components such as the sprinkler head and alarm valve group, the automatic sprinkler system also includes pressure switches, water flow indicators, terminal water test devices and other components. Before installation, the system components mainly inspect the appearance and functions of the site. Among them, the sealing performance of the terminal water test device is tested, the test pressure is () times of the rated working pressure, the pressure holding time is 5min, the water test valve of the terminal water test device is closed, and there is no leakage of the components of the terminal water test device at the end of the test.
A.1.1
B.1.2
C.1.3
D.1.4
Answer A
Analyze the sealing performance of the water test device at the end of the test. The test pressure is 1.1 times the rated working pressure.
8. After the pressure test and flushing of the automatic sprinkler system are completed, the sprinklers should be installed; before installation, consult the fire design documents to determine the types and specifications of the sprinklers in different places of use. Among them, when the width of the beam, ventilation duct, exhaust pipe and bridge is greater than () m, a sprinkler is added below the ventral surface.
A.1.1
B.1.2
C.1.3
D.1.4
Answer B.
Analysis When the sprinkler is installed in the automatic sprinkler system, when the width of the beam, ventilation pipe, exhaust pipe and bridge is greater than 1.2m, a sprinkler is added below the ventral surface.
9. After the pressure test and flushing of the automatic sprinkler system are completed, the sprinklers should be installed; before installation, consult the fire design documents to determine the types and specifications of the sprinklers in different places of use. The following does not meet the requirements for the installation of nozzles ().
A. Use special tools to install the spray head, it is strictly prohibited to use the frame of the spray head to twist
B. If the frame of the spray head and the splash plate are deformed and the damage of the original is released, replace the spray head with the same specifications and models
C. When the nozzle is installed, the nozzle can be disassembled and modified for aesthetic requirements
D. When the nominal diameter of the nozzle is less than 10mm, install a filter on the system water distribution main pipe and water distribution pipe
Answer C
When installing the nozzle, it is not allowed to disassemble and modify the nozzle, and it is strictly forbidden to attach any decorative coating to the nozzle.
10. The alarm valve group of the automatic sprinkler system is installed vertically on the main water distribution pipe, and the water flow identification of the water source control valve and alarm valve group is consistent with the system water flow direction. The installation sequence of the alarm valve group is ().
A. Water source control valve-alarm valve-auxiliary pipeline of alarm valve
B. Water source control valve-alarm valve auxiliary pipeline-alarm valve
C. Alarm valve-water source control valve-auxiliary pipeline of alarm valve
D. Alarm valve—alarm valve auxiliary pipeline—water source control valve
Answer A
Analyze the installation sequence of the alarm valve group: first install the water source control valve and alarm valve, and then connect the auxiliary pipeline of the alarm valve.
11. In the automatic sprinkler system, the following () belongs to the closed automatic sprinkler system.
A. Wet automatic sprinkler system
B. Dry sprinkler system
C. Rain system
D. Water curtain system
E. Pre-action automatic sprinkler system
Answer ABE
Analysis of closed automatic sprinkler system includes wet automatic sprinkler system, dry automatic sprinkler system and pre-acting automatic sprinkler system, etc.
12. During the periodic inspection and annual inspection of the automatic sprinkler system, for the system failure found in the inspection, the cause of the failure should be analyzed in time to eliminate the failure and ensure that the system is intact and effective. The main reasons for the leakage of the wet alarm valve group include ().
A. The drain valve is not completely closed
B. The flap seal is intact
C. Leakage of the pipeline connection on the system side
D. Alarm pipeline test control valve leakage
E. There is an unsealed state between the disc assembly and the valve seat due to deformation or dirt and debris blocking
Answer ACDE
Analyze the reasons for the leakage of the wet alarm valve group mainly including the drainage valve is not completely closed, the valve flap seal is aged or damaged, the system side pipeline interface leaks, the alarm pipeline test control valve leaks, and the deformation between the valve flap assembly and the valve seat Or dirt, debris blocking the appearance of an unsealed state.
13. The failure of components of the sprinkler system is mainly common in the alarm valve group and related components. The following possible reasons why the rain alarm valve of the automatic sprinkler system cannot enter the waiting state are ().
A. There is a problem with the reset device
B. The water supply control valve in front of the pre-action device is not open
C. The alarm valve group has not been debugged to the service state according to the installation and commissioning instructions
D. The control valve of the test pipeline is normally open by mistake
E. There is a problem with the water quality of fire fighting water, and the impurities block the filter on the pipeline of the diaphragm chamber
Answer ACE
Analyze that the rain alarm valve of the automatic sprinkler system cannot enter the servo state. There are problems with the reset device, the alarm valve group has not been debugged to the servo state according to the installation and commissioning instructions, and there is a problem with the fire water quality. On the filter.
If you want to know more exciting content of fire engineer, you can click the test guide and review materials in the custom menu of the headline of 'You Lu Fire Engineer'
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