A.at each frame
B.amidships
C.one-third the distance from the bow
D.one-third the distance from the stern
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A.greater at the bow and stern
B.reduced at the bow and stern
C.uniform over the length of the vessel
D.uniform over the length of the vessel，with the exception of the machinery spaces，where it is reduced due to increased stresses
A.Safe working load
B.Ship's working lift
C.Starboard wing lift
D.Stress，weight，load
A.crow bar
B.device to force a water tight door against the frame
C.heavy steel beam
D.wedge
A.that the fuel valve is open
B.if the air supply system is open
C.if the water sprinkler system is open
D.if the limit switch is on
A.a defective ignition system
B.low lube oil level
C.weak valve springs
D.too heavy a load
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The holding capability of an anchor is primarily determined by the（）.
Cargo pump relief valves are piped to the（）.
In ship construction，frame spacing is（）.
Permission is kindly requested（）the ballast water.
An LWT anchor often has difficulty tripping in（）.
The portable radio apparatus means（）.
As the propeller turns，voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency，pitting of the blades，and vibration. These voids are known as（）.
An example of a messenger is a（）.
The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.
The function of the bypass valve on the self-contained breathing apparatus is to（）.