海船船员 2021_10_10 每日一练
A (An) __ is the documentary attestation for the delivery of stores and spare parts.
A.engine logbook
B.delivery docket
C.store booklet
D.maintenance book
If a hydraulic pump on a winch accidentally stops while hoisting, the load will stay suspended because______.
A.a check valve will close that prevents reverse circulation
B.a centrifugal counterweight counteracts the force of gravity
C.the electric pump motor will cut out
D.the control lever will move to the stop position