A variable pitch propeller is made （）

1、（） is made of a boss with separated bl

（） is made of a boss with separated blades mounted into it.AA variable pitch propellerBA variable pitch nutCA fixed pitch parallelDA fixed pitch screw

2、Pitching is angular motion of the vess

Pitching is angular motion of the vessel about what axis?（）.ALongitudinalBTransverseCVerticalDCenterline

3、The pitch ratio of a propeller is the

The pitch ratio of a propeller is the mean pitch divided by （）.Athe propeller diameterBthe propeller radiusCthe pitch angleDthe length of helix

4、Compared to a constant pitch propeller

Compared to a constant pitch propeller, a controllable pitch propeller（）.Amore efficiently uses available engine powerBoperates at a lower effici...

5、The pitch of a propeller is a measure

The pitch of a propeller is a measure of the（）.Aangle that the propeller makes with a free stream of waterBangle that the propeller makes w...

6、______is the address of.a variable or

______is the address of.a variable or a variable in which the address of another variable is stored.ADirectorBPointerCArrayDRecord