【单选题】
在检查三角坑时，基长为6.25m，但在延长___的距离内应不允许出现三角坑。
A. 15m
B. 16m
C. 17m
D. 18m
查看试卷，进入试卷练习
微信扫一扫，开始刷题
答案
D
解析
暂无解析
相关试题
【单选题】
对于连接市中心与周边卫星城的线路及开行大站快车线路，平均站间距离大，其最高运行速度应大于___。
A. 50 km/h
B. 60 km/h
C. 70 km/h
D. 80 km/h
【单选题】
测量现场正矢时，应在好天气下进行，弦线必须拉紧，弦线的两端位置和量尺位置要正确。测量时应在轨距线处量，有肥边应在肥边处量，肥边大于___时应铲除再量。
A. 2mm
B. 3mm
C. 4mm
D. 5mm
【单选题】
根据测试，当离心加速度在0.4～0.5m/s2时，乘客还能够在车厢内自由走动，而当超过___ 时就感到行动困难了。
A. 0.5m/s2
B. 0.6m/s2
C. 0.7m/s2
D. 0.8m/s2
【单选题】
无缝线路（seamless rail、continuous welded rail）是由许多根标准长度的钢轨焊接成为不小于___的长钢轨连续铺设的轨道线路。
A. 300m
B. 400m
C. 500m
D. 600m
【单选题】
筒放散法是先封锁线路，然后将钢轨扣件全部松开，拆除长轨条端部的接头夹板，在长轨条底部每隔___放置一滚筒。
A. 5-10m
B. 10-15m
C. 15-20m
D. 20-25m
【单选题】
钢轨伸缩调节器(Expansion Rail Joint)主要用于跨度大于___的连续梁桥铺设的无缝线路上、以及道岔附近。
A. 90m
B. 100m
C. 110m
D. 120m
推荐试题
【单选题】
Aeronautical chart is divided into two categories,______. ___
A. Aeronautical map and special type of aeronautical chart
B. En-route chart and approach chart
C. Area chart and standard instrument arrival and departure chart
D. Aerodrome chart and area chart
【单选题】
Aircraft are required to comply with ATC instructions within______.___
A. advisory airspace
B. domestic airspace
C. controlled airspace
D. international airspace
【单选题】
Amendments to the initial clearance will be issued at anytime an air traffic controller deems such action necessary to______.___
A. avoid possible confliction between aircraft
B. correct the previously issued clearance
C. cancel the flight plan
D. expedite the traffic
【单选题】
研究表明，当耳机话筒的位置距离嘴（ ）英寸且稍微偏下时，传输的声音质量最佳。（注：1英寸=2.54CM）___
A. 0.25-0.5
B. 0.75-1
C. 1.25-1.5
D. 1.75-2
【单选题】
“I want to divert to shanghai” is equal to______.___
A. I want to our destination Shanghai
B. I want to overfly Shanghai
C. I want to alternate to land at Shanghai
D. I want to call Shanghai control
【单选题】
When an aircraft is being subjected to unlawful interference, the pilot should try to notify _______ of this fact.___
A. the appropriate ATC units
B. company
C. the passengers on board
D. air attendants
【单选题】
When pilot say“Did you pick it upon your screen?”,that means______.___
A. did you pick up your screen?
B. did you see it on your screen?
C. did your screen pick me up?
D. did you change your radar?
【单选题】
ATC clearance does not contain______.___
A. clearance limit
B. altitude data
C. route of flight
D. flight direction
【单选题】
When pilot sets an altimeter setting to a QNH,that will indicate_________
A. flight level
B. altitude
C. height
D. safety level
【单选题】
When pilots set a pressure of 29.92 in mercury to indicate_________
A. altitude
B. height
C. flight level
D. safety level
【单选题】
“PAN” is the international RTF______signal___
A. emergency
B. distress
C. urgency
D. dangerous
【单选题】
“MAYDAY” is the international RTF______signal.___
A. emergency
B. distress
C. urgency
D. dangerous
【单选题】
According to ICAO definition, a condition concerning the safety of an aircraft or other vehicle or of some person on board or within sight but which does not require immediate assistance is _______ .___
A. urgency
B. dangerous
C. emergency
D. distress
【单选题】
______is the accepted standard for worldwide time signal broadcast used for aviation.___
A. GMT
B. LT
C. UTC
D. SST
【单选题】
_____means the level is measured in 1013.2 pha___
A. Level
B. Height
C. Altitude
D. Flight level
【单选题】
An aircraft known or believed to be in a state of emergency should be given______over other aircraft.___
A. way
B. flight plan
C. instruction
D. priority
【单选题】
管制话筒正确使用方法是：___
A. PTT发射键还没有完全按下时就开始发指令
B. 指令还没有结束就松开PTT发射键
C. 按PTT发射键与发话同时进行，松开PTT发射键与发话同时进行
D. 先按下话筒PTT发射键，然后再开始对空发话，发话完毕后再松开话筒PTT发射键
【单选题】
Traffic information should include_________
A. direction of aircraft concerned
B. weather
C. speed of aircraft
D. heading of aircraft
【单选题】
The altimeter setting used in en-route flight should be______hpa___
A. 1019
B. 1013
C. 2992
D. 1000
【单选题】
Larger separations than the specified minima should be applied whenever in.___
A. turbulence
B. bad weather
C. a raining day
D. highlevel
【单选题】
_______is air traffic control service for controlled flights in control areas___
A. Route service
B. En-route fly service
C. Area control service
D. Deviation control service
【单选题】
_______ is a service provided to notify appropriate organizations regarding aircraft in need of search and rescue aid, and assist such organizations as required.___
A. alerting service
B. information service
C. rescue service
D. assistance service
【单选题】
Visibility is the ability as determined by atmospheric conditions and expressed in unit______.___
A. meters
B. feet
C. distance
D. odometer
【单选题】
SIGMET is a weather advisory issued concerning weather______to the safety of all aircraft.___
A. significant
B. changeable
C. information
D. condition
【单选题】
Flight level is a______of constant atmospheric pressure which is related to a specific pressure datum 1013.2hpa.___
A. standard
B. surface
C. height
D. number
【单选题】
Air traffic means all aircraft in flight or operating on the______of an aerodrome.___
A. highway
B. hanger
C. maneuvering area
D. terminal
【单选题】
The true airspeed is the airspeed of an aircraft relative to______air.___
A. turbulence
B. smooth
C. undisturbed
D. the
【单选题】
Air speed is the speed of an aircraft relative to its surrounding______.___
A. traffic
B. airmass
C. clouds
D. wind
【单选题】
“Aircraft” means any machine that can derive support in the______from there actions of the air other than there actions of the air against the earth's surface.___
A. atmosphere
B. water
C. sea
D. lake
【单选题】
If the radar receiver detects the retarding time tR＝500mS between transmitting pulse and receiving pulse,now the target is______km from the radar station.___
A. 150
B. 120
C. 100
D. 75
【单选题】
“Advise______”means“ Tell me what you plan to do”.___
A. wanting
B. intentions
C. ideas
D. command
【单选题】
The recommendation is advisory in nature.The decision as to whether the flight can be conducted safely rests solely with the______.___
A. controller
B. manager
C. pilot
D. passengers
【单选题】
“There are broken______along the entire route between niner and one one thousand feet at the present time.”___
A. radial
B. clouds
C. weather
D. way
