單項(xiàng)選擇題What is the principle behind dynamic braking as used on an anchor windlass?（）

A.Electrical loading
B.Mechanical distribution
C.Compressibility of air
D.Mechanical friction


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1.單項(xiàng)選擇題What is the holding power ratio of an anchor? （）

A.Maximum mooring line tension divided by the anchor's weight in air
B.Anchor's weight in air divided by the maximum mooring line tension
C.Preloading tension divided by the anchor's weight in air
D.Operating tension divided by the anchor's weight in air

2.單項(xiàng)選擇題What is the function of wearing rings found on some centrifugal pumps? （）

A.Absorb erosion of high velocity discharge stream
B.Seal pump shaft against entry of air
C.Isolate the outlet side from the inlet side
D.Dampen the turbulent discharge flow

3.單項(xiàng)選擇題What is the best indication of the loading of a diesel engine?（）

A.Oil temperature
B.Manifold pressure
C.Exhaust gas temperature
D.Fuel consumption

4.單項(xiàng)選擇題What is NOT a responsibility of the tankerman in charge of loading an unmanned tank barge? （）

A.Enforcement of smoking restrictions
B.Restricting vessels from coming alongside the barge
C.Insuring that a combustible gas indicator is aboard
D.Protecting cargo hose with chafing gear

5.單項(xiàng)選擇題What is NOT a precaution to be taken when topping off? （）

A.Reduce the loading rate
B.Notify the engine room of the procedure
C.Maintain communications with the dock man
D.Give the operation your undivided attention