A."vacuum"
B."the excess of pressure above atmosphere"
C."figure on a gauge"
D.Any of the above
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A.flowmeter
B.viscometer
C.micrometer
D.feeler
A.reduce electrolytic action on heat exchanger metals
B.keep heat transfer surfaces shiny and clean
C.prevent rapid accumulation of marine growth
D.provide a protective coating on heat exchanger surfaces
A.pure resistance
B.capacitive
C.inductive
D.None of the above
A.increased
B.reduced
C.unchanged
D.None of the above
A.single phase
B.two phase
C.three phase
D.four phase
最新試題
The main purpose of port State control is not to（）
The shipboard oil pollution emergency plan will be invalid after （）
Using a file without a handle may result in （）
Which of the following items don’t belong to dock repair works?（）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）