A.hard iron B.soft iron C.vertical iron only D.horizontal iron only
A.A flashing amber light B.A fixed red light C.A white flag raised and lowered vertically D.A flashing white light
A.stopper B.screen C.filter D.restrictor
A.Aye Aye Sir B.Right 15 degrees rudder C.Rudder is right 15 degrees D.No reply is necessary，just carry out the order
A.Have B.Has C.Is there D.Are there
A.a 2-second blast every 20 seconds B.a 4-second blast every 20 seconds C.an 8-second blast every 30 seconds D.a 10-second blast every 30 seconds
A.Drape along brackets B.Leave in place while back loading cargo to save time C.Hang vertically in the paint locker D.All of the above
A.flame arrestor B.flame screen C.detonation arrestor D.detonation blocker
A.From B.By C.on D.With
A.at all times B.in the bottom return mode C.in the volume reverberation mode D.only when there is no current
