单项选择题
A.(1) only is correct
B.(2) only is correct
C.both (1) and (2) are correct
D.neither (1) or (2) are correct
单项选择题 Higher than normal jacket water temperatures occurring in all cylinders of a diesel engine can result from a/an （）.
单项选择题 Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.
单项选择题 A viscous damper, as used on a marine diesel, is a sealed precision built device which dampens the torsional vibrations in the （）.