更多"Limit switches on gravity davits sh"的相关试题:
[单项选择]Limit switches are used on which davits?（）
A. Sheath-screw davits
B. Gravity davits
C. Radial davits
D. Quadrantal davits
[单项选择]The safety valves should be tested and adjusted when the boiler survey is （）
A. completed
B. carried out
C. cleaned
D. steamed
[单项选择]The water in an auxiliary boiler should be tested daily for （）.
A. dissolved oxygen
B. chlorides
C. sludge
D. dissolved nitrogen
[单项选择]（） should be tested and adjusted when the boiler survey is carried out.
A. The boiler oil tank
B. The steam pipe
C. The fire side
D. The safety valves
[单项选择]The falls on gravity davits are（）.
A. manila
B. nylon
C. wire
D. All of the above
[单项选择]When hoisting a boat on gravity type davits using an electric motor driven winch，the davit arms should be brought up（）.
A. to their final position with the winch operating at slow speed
B. to the bar stop，and then hand cranked to their final position
C. until just before they make contact with the limit switch，and then hand cranked to their final position
D. to the embarkation deck，and then hand cranked to their final position
[单项选择]Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded，the davit（）.
A. may jam against the stops
B. will not automatically position the boat at the embarkation station
C. screw may come out of the sheath
D. will chafe against the falls and may cause their failure
[单项选择]Frapping lines are fitted to lifeboat davits to（）.
A. secure the lifeboat in the davits when in the stowed position
B. bring the lifeboat close along the rali in the embarkation position
C. give the occupants a safety line when the boat is being lowered from the embarkation level
D. reduce the swinging of the lifeboat at the embarkation level
[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]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
[单项选择]Air reservoirs are designed, built and tested similarly to （）.
A. boiler drums
B. hot wells
C. condensers
D. evaporators
[单项选择]Cargo booms must be weight tested to recertify the Safe Working Load (SWL) every（）.
A. year
B. two years
C. four years
D. five years
[单项选择]A lifeboat is weight tested by lowering to near the waterand loading to capacity with weight evenly distributed. Itis then lowered into the water and released. This test mustbe done at least once every（）.
A. 6 months
B. 12 months
C. 18 months
D. 24 months
[单项选择]Each EPIRB required on an OSV shall be tested using the integrated test circuit and output indicator every（）.
A. week
B. two weeks
C. month
D. two months
[单项选择]Each EPIRB required on a ship shall be tested using the integrated test circuit and output indicator every（）.
A. week
B. two weeks
C. month
D. two months
[单项选择]This used piston had been tested and approved as a spare part by the （） during last annual repair.
A. agent
B. shipchandler
C. surveyor
D. engineer
