If the detergent type lubricating oil being used in a diesel engine is black, the oil （）
The lubricating system for the cylinder walls is different from the bearings in that the oil for former one is supplied in （） while that for latter one is （）.
The term "pour point" is defined as the lowest temperature at which lubricating oils will flow （）.
Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?（）
The sequence of parts in a generally used fuel oil supply system for a main engine is （） (1)tanks in the double bottom (2)centrifuges (3)service tank (4)settling tank (5)viscosity regulator
The （）pump is usually used as the lubricating oil pump.
In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
An important consideration in selecting a lubricating oil for use in a refrigeration compressor is for the oil to （）
The pour point of lubricating oils is affected the most by which of the following?（）
Two main lubricating oil pumps are usual and are obligatory in （）.
One of function of diesel engine lubricating oil is to （）
One characteristic of a lubricating oil adversely affecting the result of centrifuging is （）
Which of the following statements is correct concerning the viscosity of lubricating oil?（）
The operating water is supplied under the （）of an oil separator.
The temperature difference between the inlet and outlet temperature of the lube oil cooler in the lubricating system for the diesel engine is generally between （）.
The cylinder oil is pumped into the cylinder (via non-return valves) when the piston rings pass the lubricating orifices during （）
（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.
Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）
The following options are all the functions of lubricating oil except（）
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
Oil is supplied to the cylinder wall and （） by means of mechanical lubricators.
The lubricating oil is pumped from the drain tank, very often with （） in the suction line.
（） that everything in the engine crankcase is correct, start up the crankcase lubricating oil pump.
