單項(xiàng)選擇題Under manoeuvring condition the main engine may run on ().

A.gas oil
B.marine diesel oil
C.residue oil
D.crude oil


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5.單項(xiàng)選擇題To prevent the build up of high stresses engine must not be run continuously ().

A.faster than dead slow speed
B.slower than dead slow speed
C.with the output of MCR
D.at critical speeds