单选题用差压变送器测锅炉水位时，常采用参考水位罐。为使水位上升时，变送器输出也随之增大，则测量水位管应接（），参水位管应接（），同时进行负迁移。A正压室；负压室B正压室；正压室C负压室；正压室D负压室；负压室
单选题
用差压变送器测锅炉水位时，常采用参考水位罐。为使水位上升时，变送器输出也随之增大，则测量水位管应接（），参水位管应接（），同时进行负迁移。
A
正压室；负压室
B
正压室；正压室
C
负压室；正压室
D
负压室；负压室
参考解析
解析：
暂无解析
相关考题：
单选题Compass deviation is caused by（）.Amagnetism from the earth's magnetic fieldBmisalignment of the compassCmagnetism within the vesselDa dirty compass housing
单选题The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.AAn atomic time standardBDaylight Savings TimeCEastern Standard TimeDGreenwich Mean Time
单选题我国《海船船员发证规则》规定，下列有关船员健康适任要求的说法中，不正确的是（）。A一定时间内的平时工作小时最长每天不应超过10小时B工作小时可以不计必需的日常工作，如就餐替人或正常交接班所需的额外时间C各船应将值班安排表张贴在易见之处D严禁船员酗酒
单选题A fire is considered "under control" when （）.Aall hands are at their fire stationsBall fire-fighting equipment is at the sceneCthe fixed systems are activatedDthe fire is contained and no longer spreading
单选题If more than one raft is manned after the vessel has sunk，you should（）.AGo in a different direction in search of landBSpread out to increase the possibility of a search aircraft finding youCReduce the number of rafts by getting as many people as possible into as few rafts as possibleDTie the rafts together and try to stay in a single group
单选题All dues，taxes and charges or any other expenses in connection with the goods shall be paid by（）.Athe carrierBthe merchantCthe ownerDthe shipper
单选题Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.AcavitationBelectrolysisCabrasionDcorrosion
单选题已知船舶首吃水为6.50m，尾吃水为7.50m，中部吃水为7.00m，该船呈（），其拱垂值为（）。A中拱变形；0.05mB中拱变形；0.50mC中垂变形；0.50mD无拱垂变形；0.00m
单选题（）chart 3994，positions read from this chart should be shifted 0.03 minutes Northward．ATo considerBTo checkCTo examineDTo agree with
单选题接班的驾驶员在接班以前应搞清的情况应包括（）A船长对船舶航行有关的常规命令和其他特别指示B本船的船位、航向、航速和船舶吃水C当时和预报的潮汐、潮流、气象和能见度以及这些因素对航向和航速的影响D以上均正确
单选题下列有关核查避让行动说法正确的是：（）A核查避让行动的有效性，仅适用于让路船B核查避让行动的有效性，仅适用于负有让路责任和义务的船舶C由于直航船具有“保速保向”的权力，因而，查核避让行动的有效性，不适用于直航船D让路船与直航船均负有查核避让行动的有效性的责任和义务
单选题哪些船舶必须使用我国海事机构监制的航海日志（）。Ⅰ．中国籍国际航行船舶；Ⅱ．500总吨以上的沿海船舶；Ⅲ．进出我国港口的船舶；Ⅳ．悬挂方便旗的船舶。AⅠ～ⅣBⅠ、ⅡCⅡ～ⅣDⅠ～Ⅲ