【单选题】Which of the following statements is correct concerning the viscosity of lubricating oil?
A.
Viscosity will increase as temperature increases
B.
Viscosity is a measure of a fluid s internal resistance to flow
C.
Viscosity will decrease as temperature decreases
D.
Viscosity is not dependent on temperature
【单选题】Petroleum products, such as gasoline, kerosine, home heating oil, residual fuel oil, and lubricating oil, all come from one source — crude oil found below the earth' s surface, as well as under large ...
A.
Crude oil is found below land and water.
B.
Crude oil is always found a few hundred feet below the surface.
C.
Pumping and pressure force crude oil to the surface.
D.
A variety of petroleum products is obtained from crude oil.
【单选题】Petroleum products, such as gasoline, kerosine, home heating oil, residual fuel oil, and lubricating oil, all come from one source -- crude oil found below the earth' s surface, as well as under large...
A.
Crude oil is found below land and water.
B.
Crude oil is always found a few hundred feet below the surface.
C.
Pumping and pressure force crude oil to the surface.
D.
A variety of petroleum products is obtained from crude oil.
【单选题】Which lubricating oil additive is used in diesel engines to reduce the tendency(倾向)for sludge and varnish to form on the engine parts?