A.class A
B.class B
C.class C
D.class D
您可能感興趣的試卷
你可能感興趣的試題
A.steel surfaces consume oxygen by rusting
B.sealed tanks usually form a vacuum
C.moisture condenses in the tank, displacing the oxygen
D.most tank coatings give off poisonous vapors in the presence of moisture
A.until each quadrennial PSC inspection
B.until the end of each voyage
C.for a minimum of one year
D.for a minimum of two years
A.the most common method used in the United States
B.too expensive for common use
C.generally safe to sea life
D.generally harmful to sea life
A.the "snow" which is sometimes discharged along with the gas is toxic
B.prolonged exposure to high concentrations of C02 gas causes suffocation
C.rapid dissipation of the C02 vapor
D.the C02 gas is lighter than air and a large amount is required to extinguisha fire near the deck
A."A" fire
B."B" fire
C."C" fire
D."D" fire
最新試題
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
（） is not installed on the main switchboar.
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 treatment of the fuel oils involves storage, heating, filtering and（）
Diesel engine air start system check valves are opened by （）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
To proceed to the assistance of a ship in distress is（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
The shipboard oil pollution emergency plan will be invalid after （）