更多"[单选题] What is the purpose of the ra"的相关试题:
[单选题] What is the purpose of the radar reflector?
A. Making objects less visible
B. Making echoes weaker on the radar
C. Making large echoes smailer
D. Making small objects better visible
[单选题] What type of radar can activate a racon?
A. X-band radar
B. S-band radar
C. C-band radar
D. No radar can
[单选题] What type of radar can activate a SART?
A. X-band radar
B. S-band radar
C. C-band radar
D. No radar can
[单选题] What is the purpose of VRM control ?
A. To measure distance accurately
B. To measure bearing accurately
C. To measure range and bearing
D. To adjust radar monitor
[单选题] What is the main purpose of DGPS?
A.Improve positioning accuracy
B.Decrease positioning accuracy
C.Reduce operational cost
D.I don't know
[单选题] What is the main purpose of dunnage?
A. To act as ballast for light vessels
B. To provide ventilation and drainage for cargo
C. To secure the tarpaulins in place
D. To support weakened builkheads
[单选题] What is the purpose of a Pedestal Roller?
A.To change the direction of lead on a mooring line
B.To secure a chain
C.To secure the eye of a mooring line
D.To facilitate towing
[单选题] What is the purpose of the limit switch on gravity davits ________．
A.To cut off the power when the davits hit the track safety stops
B.To stop the davits from going too fast
C.To cut off the power when the davits are about 12 inches or more from the track safety stops
D.None of the above
[单选题] What is the purpose of the girders in the tank?
A. They support the stiffeners
B. They transfer all the sea forces acting on the plating
C. They support the stiffeners and take up some of the sea forces
D. I don’t know
[单选题] What is the purpose of a striker plate（防撞板） ________.
A. Provides surface for applying force on machinery
B. Provides landing surface for the sounding bob
C. Absorbs machinery vibration
D. Prevents valve stem over-travel
[单选题]WTB临近电门的作用是:（ ）What purpose is the WTB approaching switch:
A.只有在地面由SFCC使用来进行WTB接通测试. Only on the ground by SFCC using WTB connected allows tests.
B.在飞行中由任一个SFCC使用，用来确证是否存在由另一个SFCC探测的故障. In flight by a SFCC use, to confirm whether there is another SFCC by detecting the fault.
C.在飞行中由两个SFCC使用，用来检查WTB是松开的. In flight by two SFCC use, used to check the WTB is loosened allows..
[单选题]空调舱通风的目的是什么（ ）What purpose is of the air conditioning compartment ventilation system
A.防止空调舱结构损坏To prevent damage to structure of the air conditioning compartment
B.去除烟雾 To remove smoke
C.降低空调组件的出口温度 Reduced the outlet temperature of the PACK
[单选题]发动机FADEC地面电源面板的主要作用是（ ）What is the purpose of the ENG FADEC GND PWR panel?
A.复位EEC电源 To restore EEC power.
B.复位EIVMU电源 To restore EIVMU power.
C.断开EEC电源 To cut off EEC power.
[单选题]高压水分离环的作用是（ ）What is the purpose of the high pressure water separation loop
A.去除水份以防止热交换器的腐蚀 Allows water to be condensed and removed to protect the heat exchanger against corrosion
B.去除水份以防止空气循环机的腐蚀Allows water to be condensed and removed to protect the air cycle machine against corrosion
C.去除水份以防止冷凝的腐蚀Allows water to be condensed and removed to protect the condenser against corrosion
[单选题]防冰活门的作用是（ ）What is the purpose of the anti-ice valve
A.向涡轮出口供给热空气以防止冷凝器结冰Supply hot air to turbine oulet to remove ice build-up from the condenser
B.向涡轮出口供给热空气以防止冷凝器腐蚀Supply hot air to turbine oulet to remove Corrosion from the condenser
C.向涡轮出口供给冷空气以防止冷凝器结冰Supply cold air to turbine oulet to remove ice build-up from the condenser
[单选题] Which general statement concerning radar is FALSE ________．
A.Raising the antenna height increases the radar range
B.The ability of radar to detect objects is unaffected by weather conditions
C.Radar bearings are less accurate than radar ranges
D.Radar should be checked regularly during clear weather to ensure that it is operating properly
[单选题] Radar makes the most accurate determination of the ______．
A.direction of a target
B.distance to a target
C.size of a target
D.shape of a target
