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
In nautical terminology a dog is a（）.
In ship construction，frame spacing is（）.
In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.
The purpose of a bilge well is to（）.
An example of a messenger is a（）.
The C02 flooding system is actuated by a sequence of steps which are（）.
Anchors are prevented from running out when secured by the（）.
The most common type of davit found on merchant vessels today is the（）.
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（）.