Whensteamisbeingraisedonaboiler,thewaterlevelwillnormally（）.
A. dropastheboilerwarmsup
B. riseastheboilerwarmsup
C. remainunchangeduntiltheboilerishotenough
D. riseandfallwiththesteamdemand
查看答案
Cracksmaybepreventedfromdevelopingatthecornersofweldedplatinginsertsby（）.
A. squaringthecorners
B. roundingthecorners
C. plugweldingthecorners
D. slotweldingthecorners
Duringfueling，alldoors，hatches，andports（）.
A. towindwardshouldbeopenedandtheonestoleewardshouldbeclosed
B. toleewardshouldbeopenedandtheonestowindwardshouldbeclosed
C. shouldbeopened
D. shouldbeclosed
Thewaterlevelinasteamingauxiliaryboilerwillalways（）
A. risewhenthesteampressureisincreased
B. remainconstantaslongasthefeedpumpoperates
C. fallwhenthesteampressureisdecreased
D. varyasthesteamdemandchanges
HatchNo.1mustbecleaneduptomeetthe（）ofthecargosurveyors．
A. necessity
B. responsibility
C. requirement
D. stipulation
微信支付 
支付宝支付