更多"Pedestal cranes have limit switches"的相关试题:
[单项选择]Annual inspection of vessel cranes shall be conducted by（）.
A. HAS
B. the person in charge
C. a qualified inspector
D. the crane operator
[单项选择]The design specifications for cranes and crane foundations on ship’s are set and published by the（）.
A. American Society of Mechanical Engineers
B. American Petroleum Institute
C. Society of Petroleum Engineers
D. American Society of Civil Engineers
[单项选择]Hydraulic cranes must be properly warmed-up before being operated because （）.
A. warm-up allows the hydraulic system to become charged with oil
B. warm-up allows the relief valves to be properly tested
C. hydraulic strainers operate only during the warm-up period
D. hydraulic fluid must be at the proper viscosity
[单项选择]Which statement concerning maneuvering in restricted visibility is FALSE?（）.
A. A vessel which cannot avoid a close-quarters situation with a vessel forward of her beam shall reduce her speed to bare steerageway
B. A vessel which hears a fog signal forward of her beam shall stop her engines
C. A vessel which hears a fog signal forward of the beam shall navigate with caution
D. If a vessel determines by radar that a close-quarters situation is developing，she shall take avoiding action in ample time
[单项选择]For occasional heavy loads, two cranes can be arranged to work together. The operating （） for deck crane motors may be hydraulic electric.
A. principle
B. medium
C. instruction
D. voltage
[单项选择]Some cranes are mounted in pairs on a common platform which can be rotated through（）.
A. 360°
B. 270°
C. 180°
D. 90°
[单项选择]Deck cranes require（） time to prepare for working cargo than derricks.
A. less
B. more
C. many
D. much
[单项选择]假如某小区的参数设置为：LIMIT1=4，LIMIT2=8，LIMIT3=15，LIMIT4=25；若该小区某时刻上行干扰信号到达基站CDU端的噪声电平为-104dBm，则该时刻的干扰带为（）
A. BAND1
B. BAND2
C. BAND3
D. BAND4
E. BAND5
[单项选择]What is/are the advantage（s）of cranes over conventional cargo booms（）.
A. Cranes are able to pick up and drop loads over a greater spotting area
B. Increased safety because the deck is clear of running and standing rigging
C. Simplicity of operation of the crane by its operator
D. All of the above
[单项选择]Limit switches（）.
A. control the descent rate of a lifeboat
B. control the ascent rate of a lifeboat
C. cut off power to the winch when the lifeboat nears the final stowed position
D. cut off power to the winch when the lifeboat reaches the davit bumpers
[简答题]冶炼42CrMo钢，炉中分析Mo＝0.16%，钢水量20t，求需加入多少Mo-Fe，使[Mo]＝0.20%？（Mo-Fe含Mo为60%）
[简答题]由于空间狭小，Cr5Mo钢管焊接后无法进行热处理，Cr5Mo钢管焊接应选用什么电焊条？
[单项选择]The outer limit of the Traffic Separation Schemes is（）adjustment as necessary to complywith the port regulations.
A. subjecting
B. subject
C. subjected
D. subject to
[名词解释]接触电压限值（touch voltage limit）
[单项选择]1Cr5Mo是（）
A. Ⅰ类钢
B. Ⅱ类钢
C. Ⅲ类钢
D. Ⅴ类钢
[单项选择]用T2000DM工具备份的MO存放的目录可以任意选择，而用网管界面上的“数据库备份”备份后的MO只能存放在（）
A. /T2000/server/database/dbbackup
B. /T2000/server/database/MO
C. /T2000/server/script
D. /T2000/server/database
[单项选择]What is the device weight limit per CallManager in a Cisco IP phone configuration?（）
A. 2500
B. 3000
C. 5000
D. 6500
[简答题]简述rate-limit中continue的作用。
[单项选择]The right to limit liability in connection with the ship（）also extended to Charterers and any person interested in or in possession of the vessel and，in particular，any manager or operator of her.
A. has
B. takes
C. is
D. makes
