单项选择题
The viscosity regulator controls （） in order to provide oil at the correct viscosity for combustion.
A.the engines speed
B.the engines load
C.the fuel oil temperature
D.the fuel oil flow
单项选择题 The vessel is out of harbor and in “Full Ahead”We are going to run fuel oil instead of （） and open the fuel oil heater steam valve.
单项选择题 The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being （）.
单项选择题 The term medium speed diesel engine is currently taken to mean an engine with an operating rotational speed of （） rpm.