A fuse that blows often should be replaced only with a fuse of _____.
A.the recommended current and voltage rating
B.higher current and voltage rating
C.higher current and lower voltage rating
D.lower current and higher voltage rating
A.the recommended current and voltage rating
B.higher current and voltage rating
C.higher current and lower voltage rating
D.lower current and higher voltage rating
第1题
A.up and draw in a fresh air charge
B.down to burn off fuel
C.down to compress the fuel air charge
D.up and force out the exhaust gases
第2题
A.blows out the exhaust gases
B.supplies oxygen for combustion
C.cools the valves and cylinder walls
D.all of the above
第3题
A.liquid
B.oily mixture
C.emulsion
D.vapor
第4题
A.excess amount of oily-water mixtures in bilges
B.insulation of piping including exhaust pipes in engine room contaminated by oil
C.improper operation of bilge pumping arrangements
D.there were an actual emergency
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