When the propeller blades are integral with the hub, the propeller is called a ().
A、A.built up propeller
B、B.solid propeller
C、C.controllable pitch propeller
D、D.suction back propeller
A、A.built up propeller
B、B.solid propeller
C、C.controllable pitch propeller
D、D.suction back propeller
A、the bow B、the stem C、the port side D、the starboard side
A、A.straight B、B.to port C、C.to starboard D、D.None of the above
A、When dead in the water,it is often difficult to find the neutral position and slight headway or sternway may result B、When going directly from full ahead to full astern,there is complete steering control C、When the vessel has headway and the propeller is in neutral,there is no effect on rudder control D、When maneuvering in port,full ahead or astern power can usually be obtained without changing shaft RPM
A、Increase the thrust of the propeller B、Protect the propeller from striking sawyers C、Prevent the propeller from striking barges towed on the ship D、Prevent the propeller from touching bottom in low water
A、A.When dead in the water,it is often difficult to find the neutral position and slight headway or sternway may result B、B.When going directly from full ahead to full astern,there is complete steering control C、C.When the vessel has headway and the propeller is in neutral,there is no effect on rudder control D、D.When maneuvering in port,full ahead or astern power can usually be obtained without changing shaft RPM
A、the propeller diameter B、the propeller radius C、the pitch angle D、the length of helix
A、angle that the propeller makes with a free stream of water B、angle that the propeller makes with the surface of the water C、number of feet per revolution the propeller is designed to advance in still water without slip D、positive pressure resulting from the difference of the forces on both sides of the moving propeller in still water without slip
A、chief engineer B、the engineer C、captain D、any member of the engine department
A、fixed pitch propellers B、uncontrollable pitch propeller C、constant pitch propellers D、variable pitch propellers