單項選擇題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


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1.單項選擇題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

2.單項選擇題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