单选题Deck foam systems，designed to protect cargo areas on tankers built after January 1，1975，must have a supply of foam-producing material to operate the system at its designed rate of foam production for（）.A 15 minutes without rechargingB 20 minutes withou

Tested & inspected the steering systems & other navigational equipments & found them in good condition．L'dg & unl'dg finished.This remark is likely made by the OOW ______．

A.at the beginning of his watch

B.during his watch

C.at the end of his watch

D.in his cargo watch on deck

When stowing hazardous materials on deck，lashing of such cargo is permitted if ______．

A.A wooden bin is constructed of at least 2-inch dunnage and bolted together

B.The cargo is lashed to the adjacent guard rails

C.The lashings are secured to deck pad eyes

D.There is at least 3 inches of dunnage on deck

I saw the cargo surveyor ______ the cargo on deck just a minute ago．

A.examine

B.to examine

C.being examined

D.examining

Which statement is TRUE concerning deep well self-priming pumps ________．

A.When loading oil cargo，it is always loaded via the discharge line through to the pump until the tank is topped off

B.Stripping systems are generally eliminated for the purposes of cargo handling

C.In recent years deep well pumps have become increasingly unpopular in product tankers and medium size crude ships

D.There is no danger of damaging the pump from overheating

______ is not a proper procedure for a lashing of the timber deck cargo．

A.to be efficiently attached to the deck stringer plate or other strengthened points

B.to pass over the timber deck cargo

C.to be shackled to eye plates

D.to be applied not contacting with the timber deck cargo

In the stowage of deck cargo，cribbing is ______．

A.Placed on deck to support the cargo

B.Separation pieces used to keep cylinders upright and steady

C.Shims for stowing baled cargo

D.Nets placed across the hatch opening to keep the cargo from falling in the hatch

Oceangoing dry bulk cargo vessels over 1000 GT must have approved combination-type fire nozzles at all ______．

A.Fire stations aboard the vessel，except for those in open deck areas weatherdeck and cargo hold fire stations

B.Interior fire stations

C.Engine room fire stations

D.All of the above

To "shore up" the main deck for the stowage of deck cargo means to ______.

A.weld pad eyes on deck in proper position to secure the cargo

B.strengthen the main deck by placing pillars underneath it in the tween-decks

C.distribute the weight of the cargo by placing fore-and-aft planks on the main deck

D.package the cargo in wooden crates so it will not damage the deck

Regulations require that cargo pumps in tankers carrying grade D liquid cargo shall be isolated from sources of vapor ignition by ______．

A.Cofferdams

B.Gastight bulkheads

C.Passageways or living quarters

D.General cargo spaces

It is possible，and sometimes necessary，to strengthen the deck of a vessel for carriage of deck cargo by ______．

A.placing bunker on the deck

B.building a stage on which to place the cargo

C.welding steel feet to the deck，on which the cargo is placed

D.erecting vertical pillars under the deck to support the cargo