更多"[简答题]External AC power supply shall"的相关试题:
[填空题]traction power supply
[填空题]uninterrupted power supply; uninterruptible power supply (UPS)
[填空题]railway power supply and distribution system
[简答题]For the electric traction power supply railway section, when the long distance communication cable is led into the room, the indoor part and the outdoor part of the metal sheath for the cable shall be insulated from each other.
[单选题]If power supply interrupts during manual flight, master switch starting must be interrupted, and the cooling time is ：
A. 20S
B. 30S
C. 40S
[单选题]Limit the aircraft electric power supply with avionics ventilation system in normal configuration as follows:
A. OAT=55℃ time limit 1 h
B. OAT=60℃ time limit 2 h
C. OAT=49℃ no limitation
[单选题]In case the electrical power supply is interrupted during the start sequence (indicated by the loss of ECAM DUs), crew should ____.
A. Abort the start by switching OFF the MASTER sw. Then, perform a 30 s dry crank.
B. It is not necessary for the crew to shut down the engine, the FADEC applies an automatic recovery sequence
C. Engine automatically shutdown, and perform a 30 s dry crank.
[单选题] 在 PoE 术语里 PSU 全称是 Power Supply Unit,指的是供电单元,如果 PoE 交换机的以 太网接口。
A. True
B. False
[单选题]If AC Power is not available, APU FIRE TEST will not appear:
A. CRC
B. APU FIRE pb-sw lighted red
C. SQUIB light and DISCH light on
[简答题]All construction parties shall establish and improve quality assurance system,exercise wholeprocess control of construction quality,and implement lifelong quality accountability system.
[简答题]The clock synchronization network shall adopt hybrid synchronous networking with regional control and multi reference clock control method. The master slave synchronization mode shall be adopted in each synchronization region, and the quasi synchronization mode shall be adopted between regions.
[简答题]The data communication network shall provide IP bearer network of wide area network for information systems such as railway transport organization, passenger and freight marketing, operation and management, as well as communication systems such as GSM-R and video-related systems.
[简答题]The selected construction scheme shall be safe and reliable,advanced in technology,easy to operate and the most optimized.
[简答题]The repeating signal shall be installed within the sighting distance of main signal, at a place as far from the main signal as possible.
[简答题]The design of railway communication shall comply with the requirements of reliability, availability, maintainability and safety for the equipment operation and maintenance.
[简答题]The design of video system shall comply with the video monitoring requirements of railway transportation production, equipment supervision, emergency rescue and security precaution to fulfill the sharing of network resource and video information.
[简答题]The Parties shall enter into a Contract Agreement within 28 days after the Contractor receives the Letter of Acceptance, unless they agree otherwise.
