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
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