Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed ___.

A．apparent slip

B．true slip

C．pitch

D．propulsive efficiency

[单选题]Propeller pitch speed minus ship speed divided by the propeller pitch speed is termedA．apparent slipB．true slipC．pitchD．propulsive efficiency

[单选题]当出现“SPEED，SPEED，SPEED”的语音警告时表示：（）A .速度超限B .当前推力不足以通过俯仰操纵来恢复正常飞行C .速度偏离选择或管理的速度

[单选题]C．ompared to a constant pitch propeller, a controllable pitch propellerA．more efficiently uses available engine powerB．operates at a lower efficiency at a fixed speedC．produces the same torque at lower engine powerD．develops its rated power at a lowe

[单选题]A． controllable pitch propeller on a diesel driven vessel eliminates the need forA．friction clutchesB．disconnect clutchesC．reversing gearsD．reduction gears

[单选题]A variable pitch propeller is made （） a boss with separate blades mounted into it.A . ofB . up ofC . fromD . out

[多选题] 关于《故障集》中对error_pitch_speed_limit解释说明正确的是（）A . 表示变桨速度超限，超过了限定值14°/sB . 第一步检查旋转编码器的插头及插头处的屏蔽层连接C . 第二步检查旋转编码器信号线到变桨柜出的哈丁插头的屏蔽层的连接D . 第三步检查X3端子排上的接线及KL5001上的接线；E.第四步以上检查都良好，那么建议更换旋转编码器

[单选题]A．) rateB．) paceC．) stepD．) speed

[单选题]What is the speed of the crankshaft in a four-stroke/cycle engine when the camshaft is turning at 750 rpm?（）A . 375 RPMB . 500 RPMC . 750 RPMD . 1500 RPM

[试题]Tospeedupthe______ofletters,thePostOfficeintroducedautomaticsorting.A．)treatmentB)deliveryC)transmissionD)departure

[单选题]The high-speed data services for the interconnection of computer networks are usually referred to as ______ connections．A．LANsB．MANsC．WANsD．ATM