单选题调距桨船舶可调节H/D适应航行状态J的变化，其原理是（）。AJ↑螺旋桨曲线变平坦，H/D↑螺旋桨曲线变陡BJ↑螺旋桨曲线变陡，H/D↑螺旋桨曲线变平坦CJ↓螺旋桨曲线变平坦，H/D↓螺旋桨曲线变陡DJ↓螺旋桨曲线变平坦，H/D↓螺旋桨曲线变平坦
单选题
调距桨船舶可调节H/D适应航行状态J的变化，其原理是（）。
A
J↑螺旋桨曲线变平坦，H/D↑螺旋桨曲线变陡
B
J↑螺旋桨曲线变陡，H/D↑螺旋桨曲线变平坦
C
J↓螺旋桨曲线变平坦，H/D↓螺旋桨曲线变陡
D
J↓螺旋桨曲线变平坦，H/D↓螺旋桨曲线变平坦
参考解析
解析：
暂无解析
相关考题：
单选题Gas exchange, which is a basic part of the cycle of an internal combustion engine, is（）Athe supply of normal air and removal of compressed airBthe supply of fuel oil and combustion of the atomized oilCthe supply of fresh air and removal of exhaust gasesDthe supply of fresh air and removal of the extra heat
单选题An ocean towing bridle whose legs are of equal length，but too short，may（）.Afail to provide spring in the hawserBcause unequal distribution of the load to one legCcause the bridle legs to jump clear of the chocks or fairleadsDNone of the above
单选题在发电机组自动并车的过程中，脉动电压经鉴幅器作用后，若鉴幅器的释放电平与脉动电压的相交点（截止点）到脉动电压US=0之间的时间很短，则说明（）。A待并发电机与电网之间频差太小B待并机与电网之间频差太大C待并机与电网之间电压差大小D待并机与电网之间电压差太大
单选题The force acting on a single cargo runner which is vertically lifting or lowering a load is greatest when（）.Adecelerating when lowering the loadBdecelerating when raising the loadClowering the load at constant speedDraising the load at constant speed
单选题Personnel working with refrigeration systems, and subject to the exposure of refrigerants should wear （）.Aface shieldBa respiratorCrubber glovesDan all purpose gas mask
单选题When is the density of the water required to be logged in the logbook of a ship?（）AAny time the vessel moves from water of one density into waters of a different densityBPrior to getting underway when the vessel is floating in fresh or brackish waterCOnly when the vessel moves from fresh water into salt waterDThe density of the water is not required to be logged in the unofficial logbook
单选题船舶在大风浪中锚泊时，各项准备工作包括（）。 Ⅰ、注意做好大风浪中航行的各项准备； Ⅱ、所有安全设备和消防系统处于备用状况； Ⅲ、燃油日用柜注意放残水； Ⅳ、主机滑油循环柜油量保持正常； Ⅴ、注意主辅机、燃油、滑油系统滤器的情况。AⅠ＋Ⅲ＋ⅣBⅡ＋ⅤCⅠ＋Ⅳ＋ⅤD以上全部
单选题A mortgagee does not acquire a right to the freight（）he has taken actual or constructive possession of the ship.AwhereBifCandDunless
单选题The deck water seal of the inert gas system（）.Acools the inert gas and prevents soot from entering the cargo tanksBacts as an emergency system shutdown when the inlet pressures exceed the safe working pressure in the hazardous zoneCprevents the backflow of hydrocarbon gasses into nonhazardous areasDrelieves sudden large overpressures in the system
单选题关于气缸套的结构论述正确的是（）。A气缸套突肩径向和轴向固定B气缸套和气缸盖之间都用紫铜垫片实现高压燃气密封C气缸套下部轴向不固定，下部外圆和气缸体内孔之间留有一定间隙D气缸套用螺栓固定到气缸体上
单选题MF/HFDSC终端中，调制解调器的作用是（）。A实现模拟音频信号和高频信号间的变换B实现模拟音频信号和数字基带信号之间的变换C实现接收信号和发送信号之间的变换D实现数字信号和高频信号之间的变换
单选题（）是制冷压缩机需要采用能量调节装置的主要原因。A制冷量大B气缸数目多C热负荷变化大D制冷温度低