【 Weak current college 】 building weak electricity system---after-school exercises

First, multiple choice questions (alternate answer each question, only one adresses. ）
1. in General, regional alarm system should be used () Protection object.
A £ ® premium
B £ ® level
C £ ® level 2
D £ ® III
　　　
2. set the alarm system should be used () Protection object.
A £ ® grade, level
A II, B.
C £ ® II and III
D £ ® non rating
　　 　
3. the control center and alarm system should be used () Protection object.
A £ ® grade, level
A II, B.
C £ ® II and III
D £ ® non rating
　　 　
4. the perceptual combustion or thermal decomposition of solid or liquid particles, is used to detect fire smoke and issued at the beginning of the fire alarm signal detector is ().
A £ ® heat fire detectors
B £ ® sensitive detector
C £ ® combustible gas detector
D £ ® smoke detector
　　 　
5. adoption of the detection of flame in the infrared and ultraviolet light to detect fire detector is ().
A £ ® heat fire detectors
B £ ® sensitive detector
C £ ® combustible gas detector
D £ ® smoke detector
　　 　
6. automatic fire alarm system grounding resistance, the use of dedicated grounding equipment, grounding resistance should not be greater than ()
A．1
B．2
C．3
D．4
　　 　
7. automatic fire alarm system grounding resistance, the use of common grounding equipment, grounding resistance should not be greater than ().
A．1
B．2
C．3
D．4
　　 　
8. use of the human body temperature, the radiation detecting infrared wavelength detector is ().
A £ ® beam trip-detector
B £ ® thermal infrared detector
C £ ® microwave body Rover
D £ ® ultrasonic object movement detectors
　　 　
9. in a biometric system, use sound differences as well as the directive content compares different but is ().
A £ ® fingerprint machines
B £ ® PalmPrint machine
C £ ® retina identification machines
D £ ® voice identification machines
　　 　
10. in the local scope using the computer network that features cover a limited geographical scope, the smaller, network computers and related equipment are typically limited to one unit, of a building or even an office network called ().
A wide area network.
B £ ® Metro
C £ ® LAN
D £ ® regional network
2. fill in the blanks questions (please toyoko line on enter your answer. ) 1. intelligent building automation, fire-fighting system, contains two subsystems.
2. automatic fire alarm systems by, and four parts.
3. regional alarm system is composed of, and fire alarms, fire alarm system.
4. set the alarm system by,,,, fire alarm installations of automatic fire alarm system.
5. the type of automatic fire detectors are, and combustible gas detector and.
6. cable TV (CATV) systems, and made up of three parts.
7. the security system provides, and three levels of protection.
8. TV monitoring system in accordance with the functionality can be divided into, and four parts.
9. access control system is mainly composed of, and, as well as additional alarm and monitoring system.
10. patrol system is divided into two categories.
11. car park management system by,,,,, venue parking and traffic path boot instructions and other equipment facilities.
12. building security intercom system from wire can be roughly divided into, and three.
13. telephone communication system consists of three parts, and components.
14. computer network press coverage of the geographical area is divided into, and.
15. computer network topology of the network is divided into,, and, and. Third, the noun parser (in the the nouns in the text box below, enter your answer. 1. after deploying) delayed
　　　 　
2. program control switches
　　　 　
3. patrol subsystem
　　　 　
4. carrier to noise ratio
　　　 　
5. combustible gas detector
IV. question
1. What are the main fire detector types? how to select a detector? 【 answer points 】--------------------------------------------------------------------------------
The type of automatic fire detectors are: smoke detector and heat detector, photoconductor (flame) fire detectors, combustible gas detector and composite fire detectors.
According to the detection area may sendStudents of early fire of formation and development of features, room height, environmental conditions, and may produce a false positive factors such as conditions determine: ① when fire is smoldering in the early stages, producing a lot of smoke and a small amount of heat, with little or no flame, smoke detector should be chosen;
② the rapid development of fire, resulting in a lot of smoke, heat and flame radiation, can choose smoke detector and heat detector, flame detector or their combinations;
③ the rapid development of the fire, there is a strong fire radiation and a small amount of smoke, heat, should use flame detector;
④ the use, production or gather flammable gases or combustible liquids, steam, should use flammable gas detector.
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2. automatic fire alarm and fire control system commissioning before doing what? system commissioning programs include general? 【 answer points 】--------------------------------------------------------------------------------
(1) commissioning before ① in the construction interior trim and system installation is complete, and after the completion of the report.
② in system commissioning, commissioning units must have the following documents: the system block diagram and the system of building floor plan; equipment installation dimension; equipment installation of the equipment external wiring diagram; change the design part of actual construction drawings and change the design of the supporting documents; installation acceptance certificate, included technical records and installation inspection records; device instruction manual; commissioning programs or procedures; commissioning staff qualification and responsibility.
③ commissioning workplace must by fire monitoring bodies for review and approval of qualified staff, should generally be determined by the production factory engineers or commissioned by trained staff. All staff should attend debugging functions clear and should be strictly in accordance with the debugger.
④ commissioning to seriously check set alarm controller, area alarm controller, detectors and manual alarm button, alarm device specifications, model and quantity meets the design requirements, spare parts and technical information are complete.
⑤ check system installation conforms to the automatic fire alarm system installed using the standard "requirements of the relevant provisions.
⑥ check system line is correct.
⑦ in commissioning the check before, such as found in the design and installation problems and other issues of commissioning, with the relevant departments to coordinate and make written records.
(2) the General System commissioning programs focus on ① first alarm controller, zone alarm control, fire alarm and fire control equipment according to the requirements of stand-alone power check test, correctly before you can access system for debugging.
② in the commissioning process, a stand-alone access system is powered on, the alarm controller do fire alarm self-test feature, silencers reset functions, fault alarm, fire alarm priority function, alarm and memory, power supplies, automatically convert and backup power supply automatic charger, the standby power supply undervoltage and overvoltage alarm. In the power check box, all the features mentioned above must be consistent with the fire alarm Controller General technical conditions ". For product specifications of the other features, such as pulse reset, regional cross and the alert level in commissioning should also be checked individually.
③ Press design documentation and design requirements, using the main power and standby power supply system of control functionality and linkage control function, control functions and linkage function should be fine.
④ check the main power and standby power supply capacity, the capacity should be consistent with the fire alarm Controller General technical conditions.
⑤ should be main and standby power supply test of automatic conversion.
⑥ to standby power supply continuous charge and discharge for 3 times, its function should be fine.
⑦ after debugging normal system functions, you should use special flue heating and tester for installation of each control measure for adding smoke (or warm) test.
⑧ Press system debugging functionality of the system. System debugging fully functioning after continuous trouble-free operation 120h, write out commissioning report. --------------------------------------------------------------------------------

3.CATV system design based on the three technical parameters and indicators? in the design of these three indicators of what? 【 answer points 】--------------------------------------------------------------------------------
Usually the system output level, CNR, carrier beat combo three times higher than these three parameters of indicators as a system design is the main basis.
① system output level: refers to the system output to output the value of the signal level. To avoid interference, General nonlinear distortion by 65 ± 15dBmV level to design.
② carrier to noise ratio: refers to the transmission of television signals through the system, the carrier power and noise power ratio. System of a major carrier to noise ratio depends on the system using various amplifier output signal of the carrier to noise ratio. Amplifier output signal of the carrier to noise ratio in addition and Amplifier noise coefficient for itself, and the input signal level for the input signal level higher output signal carrier to noise ratio.
From the TV image quality to meet the subjective evaluation standards of the 4 levels of the above considerations, the technical specifications of the 1950sSetting system of the carrier to noise ratio should be not less than 43dB.
③ carrier combined third beat ratio: the technical specifications of the system of carrier mix three beat ratio should be not less than 54dB. --------------------------------------------------------------------------------

4. Please describe the work of the parking management system. 【答题要点】 --------------------------------------------------------------------------------
(A)
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5. building on security system requirements? 【 answer points 】
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(A)