A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a ______.A.main braceB.tow spanC.jockey barD.None of the above
A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a ______.
A.main brace
B.tow span
C.jockey bar
D.None of the above
相关考题：
On which vessels are the officers and deck crew allowed to operate under a two-watch system on voyages of less than 600 miles?A.Towing vesselsB.Offshore supply vesselsC.Barges，when mannedD.All of the above
A vessel towing a barge astern would show，at the stern ______.A.only a stern lightB.a towing light above the stern lightC.two towing lights in a vertical lineD.two white lights in a vertical line
Certificate of Fitness for the Carriage of Liquefied Gases in Bulk shall be carried on board by ______．A.gas carriers constructed on or after 1 July 1986B.gas carriers constructed before 1 July 1986C.All chemical tankersD.oil tankers of 150 gross tonnage and above
International Certificate of Fitness for the Carriage of Dangerous Chemicals in Bulk shall be carried on board by ______．A.chemical tankers constructed on or after 1 July 1986B.chemical tankers constructed before 1 July 1986C.All chemical tankersD.oil tankers of 150 gross tonnage and above
When stowing hazardous materials on deck，lashing of such cargo is permitted if ______．A.A wooden bin is constructed of at least 2-inch dunnage and bolted togetherB.The cargo is lashed to the adjacent guard railsC.The lashings are secured to deck pad eyesD.There is at least 3 inches of dunnage on deck
In heavy weather you notice buckling in the midships deck plating of your vessel．To relieve the strain you could ______．A.pump fuel oil from midships to the ends of the vesselB.reduce speedC.take a course which most eases the vesselD.All of the above
It is possible，and sometimes necessary，to strengthen the deck of a vessel for carriage of deck cargo by ______．A.placing bunker on the deckB.building a stage on which to place the cargoC.welding steel feet to the deck，on which the cargo is placedD.erecting vertical pillars under the deck to support the cargo
Most propellers on merchant vessels are constructed of______．A.manganese bronzeB.cast ironC.mild steelD.improved plow steel
主甲板以下是二层甲板。（）A、The deck below the lower deck is known as ‘tween deck.B、The deck below the main deck is known as ‘tween deck.C、The deck above the main deck is known as ‘tween deck.D、The deck below the lower deck is known as main deck.
水手长正在甲板上刮掉起皮的油漆。（）A、The bosun is cleaning the heavy paint on deck.B、The bosun is scraping the heavy paint on deck.C、The bosun is scraping the loose paint on deck.D、The bosun is cleaning the loose paint on deck.
A short raised deck above the main deck at bow is called the（）.A、fore deckB、fore quarterC、aft quarterD、forecastle deck
单选题水手长正在甲板上刮掉起皮的油漆。（）AThe bosun is cleaning the heavy paint on deck.BThe bosun is scraping the heavy paint on deck.CThe bosun is scraping the loose paint on deck.DThe bosun is cleaning the loose paint on deck.
单选题By definition，a spar deck is the（）.Alower most continuous deck not broken by water tight bulkheadsBafter most weather deck above the main strength deckCupper or weather deck above the main strength deckDdeck of light construction below the main or strength deck
单选题A vessel towing a barge astern would show，at the stern（）.Aonly a stern lightBa towing light above the stern lightCtwo towing lights in a vertical lineDtwo white lights in a vertical line
单选题In astern towing，a tow span，also called the tow bar or towing arch，is used to（）.Ainsure that the hawser leads directly aft as it passes over the stern of the towing vesselBincrease the stability of the towing vessel by raising the hawser off the deckCreduce chafing of the towing hawserDprevent fouling of the hawser on deck gear located on the stern of the towing vessel
单选题It is possible，and sometimes necessary，to strengthen the deck of a vessel for carriage of deck cargo by（）.Aplacing bunker on the deckBbuilding a stage on which to place the cargoCwelding steel feet to the deck，on which the cargo is placedDerecting vertical pillars under the deck to support the cargo
单选题A cofferdam is（）.Aany deck below the main deck and above the lowest deckBa member that gives fore-and-strengthCmade by placing two bulkhead a few feet apartDa heavy fore-and-aft beam under the deck
单选题A single towing light will be carried above a vessel’s sternlight（）.Aonly if she is towing asternBonly if the tow exceeds 200 metersCat any time when towingDif the towing vessel is part of a composite unit
单选题In heavy weather you notice buckling in the midship deck plating of you vessel. To relieve the strain you could（）.Apump fuel oil from midships to the ends of the vesselBreduce speedCtake a course which most eases the vesselDAll of the above
单选题A power-driven vessel，when towing astern，shall show（）.Atwo towing lights in a vertical lineBa towing light in a vertical line above the sternlightCtwo towing lights in addition to the sternlightDa small white light in lieu of the sternlight
单选题A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a（）.Amain braceBtow spanCjockey barDNone of the above
单选题A towing vessel and her tow are severely restricted in their ability to change course. When making way，the towing vessel will show ONLY（）.Athe masthead lights for a towing vesselBthe lights for a vessel restricted in her ability to maneuverCsidelights，stern light，and towing lightDAll of the above
单选题When lowering lifeboats in heavy seas，a good practice is to rig frapping lines（）.Aon only the forward fallsBon only the after fallsCwith a lead of about 45 degrees to the boatDfrom the falls to the main deck of the vessel
单选题Most propellers on merchant vessels are constructed of（）.Amanaganese bronzeBcast ironCmild steelDimproved plow steel
单选题A cofferdam is（）.Aany deck below the main deck and above the lowest deckBa member that gives fore-and-aft strengthCmade by placing two bulkheads a few feet apartDa heavy fore-and-aft beam under the deck