單項(xiàng)選擇題According to the Code of Federal Regulations，on vessels other than river ferryboats and river vessels，how are periodic lifeboat weight tests required to be conducted?（）

A.The lifeboat is lowered to near the water，loaded with the allowed capacity，lowered into the water until afloat，then released from the falls
B.The lifeboat is loaded with the allowed capacity，lowered into the water until afloat，then released from the falls
C.The lifeboat is lowered into the water until afloat，loaded with the allowed capacity，then released from the falls
D.The lifeboat is lowered to near the water，loaded with the allowed capacity，then released from the falls


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1.單項(xiàng)選擇題A self-righting survival craft will return to an upright position provided that all personnel（）.

A.are seated with seat belts on and doors shut
B.are seated with seat belts on and doors open
C.are to shift to one side to right it
D.escape from the craft

3.單項(xiàng)選擇題A fully loaded motor-propelled lifeboat must be capable of attaining a speed of at least（）.

A.3 knots in smooth water
B.6 knots in smooth water
C.3 knots in rough water
D.6 knots in rough water

4.單項(xiàng)選擇題A certificated lifeboatman assigned to command the lifeboat should（）.

A.be the first individual to board the craft
B.drain the hydraulic pressure before lowering the craft
C.have a list of the persons assigned to the lifeboat
D.All of the above

5.單項(xiàng)選擇題When in command of a lifeboat under oars，the command TOSS OARS means to（）.

A.lift oars to vertical position，trim blades fore and aft with handles resting on the thwarts
B.complete the stroke，come to Oars，raise the oars smartly to the vertical，rest handles on footings and trim blades fore and aft
C.place oars in row locks directly from the boated position or from Stand by oars position
D.complete the stroke (when rowing in ahead motion)，raise the oars with crook of elbow to about 30 degrees，swing blades forward