A.crow bar
B.device to force a water tight door against the frame
C.heavy steel beam
D.wedge
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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
A.once each crankshaft revolution
B.twice each crankshaft revolution
C.every other crankshaft revolution
D.every fourth stroke
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.cargo pump pressure gauges
B.crossover lines interconnecting two pumps
C.suction side of pumps
D.atmosphere through pump vents
最新試題
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.
An LWT anchor often has difficulty tripping in（）.
In ship construction，frame spacing is（）.
The purpose of a bilge well is to（）.
Anchors are prevented from running out when secured by the（）.
As oil pipe line connections were broken，（）quantity of oil was caused to spill onto the wharf and into the dock water.
The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.
Cargo pump relief valves are piped to the（）.
The portable radio apparatus means（）.
The series of valves used to control the return flow in well control operations is called the（）.