单选题Which statement concerning current is TRUE（）.ACurrent can be determined by measuring the direction and distance between simultaneous EP and DR positionsBThe drift of the current should be averaged out on a one hour basisCAfter the current is determined，it should not be used for further plotting because it is an unknown variableDThe distance between a simultaneous DR position and fix is equal to the drift of the current
单选题
Which statement concerning current is TRUE（）.
A
Current can be determined by measuring the direction and distance between simultaneous EP and DR positions
B
The drift of the current should be averaged out on a one hour basis
C
After the current is determined，it should not be used for further plotting because it is an unknown variable
D
The distance between a simultaneous DR position and fix is equal to the drift of the current
参考解析
解析：
暂无解析
相关考题：
Concerning baby-sitting and managing a paper route, which of the following statement is true?A． Both call for daily service.B． Both call for a sense of responsibility.C． Neither is affected by bad weather.D． Neither is helpful to character development.
Given that the current directory is empty, and that the user has read and write privileges to the current, and the following:Which statement is true?() A.Compilation fails.B.Nothing is added to the file system.C.Only a new file is created on the file system.D.Only a new directory is created on the file system.E.Both a new file and a new directory are created on the file system.
Which statement concerning current is TRUE ________．A.Current can be determined by measuring the direction and distance between simultaneous EP and DR positionsB.The drift of the current should be averaged out on a one hour basisC.After the current is determined，it should not be used for further plotting because it is an unknown variableD.The distance between a simultaneous DR position and fix is equal to the drift of the current
Which statement is TRUE concerning the flash point of a substance ________．A.It is lower than the ignition temperatureB.It is the temperature at which a substance will spontaneously igniteC.It is the temperature at which a substance，when ignited，will continue to burnD.It is the temperature at which the released vapors will fall within the explosive range
Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited ________．A.It is required on all vesselsB.It may be located in a conspicuous place in the wheelhouseC.It may be located at the bilge and ballast pump control stationD.All of the above
Which statement is TRUE concerning combustible gas indicators ________．A.One sample of air is adequate to test a tankB.They do not work properly where there is a lack of oxygenC.They will detect a lack of oxygenD.They are calibrated to read the percentage chance of explosion
Which statement concerning GPS is TRUE ________．A.It cannot be used in all parts of the worldB.There are 12 functioning GPS satellites at presentC.It may be suspended without warningD.Two position lines are used to give a 2D fix
Which statements concerning the switch construct are true？（） A、All switch statements must have a default label.B、There must be exactly one label for each code segment in a switch statement.C、The keyword continue can never occur within the body of a switch statement.D、No case label may follow a default label within a single switch statement.E、A character literal can be used as a value for a case label.
单选题Which statement is TRUE concerning a towing vessel which，due to the nature of her work，is unable to keep out of the way of another vessel?（）ABy day，she shall carry a black cylinder shapeBBy day，she shall carry two black balls in a vertical lineCBy night，she would show the same lights as a vessel not under commandDBy day，she would show the same shapes as a vessel restricted in her ability to maneuver
单选题Which statement about stopping a vessel is TRUE?（）AA lightly laden vessel requires as much stopping distance as a fully laden vessel when the current is from asternBA vessel is dead in the water when the back wash from astern operation reaches the bowCA tunnel bow thruster can be used in an emergency to reduce the stopping distanceDWhen a vessel is dead in the water any speed displayed by doppler log reflects the current
单选题Which statement concerning sweat damage in containers is TRUE?（）.ASweat damage in containers is unusual due to the small enclosed volume of airBIn general，containerized hygroscopic cargoes are the only ones subject to sweat damageCContainers should be ventilated，dehumidified，or the contents physically protected against sweat damageDSweat damage is not a problem except in insulated and refrigerated containers
单选题Which statement(s) is/are TRUE concerning crane cargo operations? （）ADo not exceed rated load capacity of crane and container spreader or slingsBDuring any cargo handling operation，the safety of personnel is paramountCCargo handlers must be outfitted with adequate protection from personal injuryDAll the above
单选题Two barges are being pushed ahead by a tugboat.Which statement is TRUE concerning lights on the barges（）.AEach vessel should show sidelightsBEach vessel should show at least one white lightCThe barges should be lighted as separate unitsDThe barges should be lighted as one vessel
单选题Which statement is TRUE concerning the gooseneck（）.AIt is a sailing maneuver which brings the vessel's head through the windBIt connects the boom to the mast and allows the boom to swing freelyCIt is a sailing condition where there is a loss of air flow over the sailsDNone of the above
单选题Which statement is TRUE concerning hawser towing? （）AThe catenary in a hawser should be sufficient so that the hawser just touches the bottomBThe hawser is of sufficient length for towing when taut between tug and towCIncreasing speed usually increases the catenary in the hawserDShortening the tow hawser generally decreases the maneuverability of the tug
单选题If the situation arose where it became necessary to tow a disabled vessel，which statement is TRUE concerning the towing line?（）.AThe towing line between the two vessels should be clear of the waterBThe towing line should be taut at all times between the vesselsCThere should be a catenary so the line dips into the waterDNone of the above
单选题Which statement concerning teams is true?ANowadays teamwork is a popular concept.BAll the companies put great emphasis on teams.CA good team involves close supervision of the team leader.DThere’s nothing in common between a team and a group.
单选题Which statements concerning the switch construct are true？（）AAll switch statements must have a default label.BThere must be exactly one label for each code segment in a switch statement.CThe keyword continue can never occur within the body of a switch statement.DNo case label may follow a default label within a single switch statement.EA character literal can be used as a value for a case label.
单选题Which of the following statements is true concerning simple parallel resistance circuits?（）AThe total current flow equals the sum of the individual currentsBThe total current flow equals the reciprocal of the sum of the individual currentsCThe total resistance equals the sum of the individual resistanceDThe total voltage equals the sum of the individual voltages across each resistance
单选题Which statement is TRUE concerning lifeboat gripes?（）AThey must be released by freeing a safety shackleBThey should not be released until the boat is in lowering positionCThey may be adjusted by a turnbuckleDThey are normally used only with radial davits
单选题Which statement is TRUE concerning gasoline vapors on board a vessel（）.AThey are heavier than air and will settle in the lowest part of the vesselBThey are lighter than air and will settle in the highest part of the vesselCThey should be vented into the engine to improve combustionDThey should be vented into the wheelhouse
单选题Which statement concerning Montauk Point Light is TRUE（）.AThe light comes on at sunsetBThere is an emergency light if the main light is extinguishedCThe height of the light is 24 feetDThe tower is painted with black and white stripes
单选题Which statement is TRUE concerning the tandem working arrangement of pedestal cranes when completing a quad lift? （）AThe discharge is slow due to the size of the cargo and all the cranes working togetherBThe cargo discharge can be accomplished with controlled pendulationCThe cargo discharge can be performed in port or at anchorDThe cranes enable the handling of heavy cargos without shoreside assistance
单选题Which statement is TRUE concerning protection of double bottom tanks against excessive pressure? （）AEach vent for the tank must be equal to the area of the tank filling lineBThe tanks must be protected by overflowsCThe total area of the vents or the overflow shall be at least equal to the area of the fill lineDThere must be twice as much vent area as the area of the fill line
单选题Given that the current directory is empty， and that the user has read and write privileges to the current directory， and the following： Which statement is true？（）A Compilation fails.B Nothing is added to the file system.C Only a new file is created on the file system.D Only a new directory is created on the file system.E Both a new file and a new directory are created on the file system.
单选题At 2200 you take the following loran readings: 9960-W-15064.5; 9960-Y-43954.8. Which statement is TRUE? （）AThe current is floodingBYou are being set to the left of the trackCThe set is towards the southwestDThe drift is 0.6 knot.
单选题Which statement is TRUE concerning spare charges for portable fire extinguishers on unmanned tank barges?（）.ASpare charges shall be carried for at least 50 percent of each size and variety required on boardBIf the unit cannot be charged by the vessel's personnel，one spare unit shall be carried in lieu of spare chargesCSpare charges shall be stowed in watertight containers on deckDRegulations concerning spare charges do not apply to unmanned barges