当正副驾驶的姿态、指示，即俯仰、翻滚、指示相差5度时（）。

A:PITCH显示在PFD左侧，ROLL显示在PFD右侧 B:只显示PITCH在PFD上 C:只显示ROLL在PFD上 D:PITCH显示在PFD右侧，ROLL显示在PFD左侧

音高（Pitch）

音名（Pitch name）

_____ is made of a boss with separated blades mounted into it.

A:A variable pitch propeller B:A variable pitch nut C:A fixed pitch parallel D:A fixed pitch screw

Compared to a constant pitch propeller, a controllable pitch propeller _____.

A:more efficiently uses available engine power B:operates at a lower efficiency at a fixed speed C:produces the same torque at lower engine power D:develops its rated power at a lower speed

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

A:apparent slip B:tree slip C:pitch D:propulsive efficiency

By which of the following means is force efficiently provided to vary the pitch of the blades on a modem controllable pitch propeller?

A:Hydraulic B:Mechanical C:Pneumatic D:Electrical

For vessels with _____, the meaning of the order would include the combination of pitch and revolutions as indicated in ships orders.

A:fixed pitch propellers B:uncontrollable pitch propeller C:constant pitch propellers D:variable pitch propellers

The pitch ratio of a propeller is the mean pitch divided by _____.

A:the propeller diameter B:the propeller radius C:the pitch angle D:the length of helix