A.beats
B.beasts
C.bacons
D.battens
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A.valve assembly
B.standpipe manifold
C.accumulator manifold
D.choke manifold
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.control the pressure of the oxygen as it enters the body
B.allow the wearer to manually give himself oxygen
C.release excess heat which would otherwise cause the bottle to explode
D.allow exhaled gases to pass outside the bottle
A.Safe working load
B.Ship's working lift
C.Starboard wing lift
D.Stress，weight，load
A.sand
B.soft soil
C.stiff clay
D.heterogeneous soil
A.They are less expensive
B.They are smaller for equivalent pumping ability
C.They pump more cargo in less time
D.All of the above
A.The bow will go to port
B.The bow will go to starboard
C.The bow will remain steady
D.The stern will go to starboard
A.crow bar
B.device to force a water tight door against the frame
C.heavy steel beam
D.wedge
A.brake
B.devil's claw
C.pawls
D.All of the above
A.the radio apparatus fitted on the portside
B.the radio with a portable equipment
C.the radio equipment which is easily movable
D.the portable radio with some apparatus
最新試題
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（）.
The boat is stowed on the davit rather than on a cradle with which type of davit?（）
The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）
In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.
The portable radio apparatus means（）.
An example of a messenger is a（）.
The purpose of a bilge well is to（）.
The most common type of davit found on merchant vessels today is the（）.
In ship construction，keel scantlings should be the greatest（）.
Anchors are prevented from running out when secured by the（）.