单选题Which of the following is a factor of fuel oil almost having nothing to do with the formation of combustion products?（）A setting pointB ashC sulfur contentD carbon residues

Which of the following operations need NOT to be entered on the Oil Record Book Part I? I、Disposal of oil residues. II、 Internal transfer of fuel oil

A.I only

B.II only

C.both I and II

D.neither I nor II

Which of the following can be used in hydraulic transmission system?

A.Hydraulic oil

B.Animal oil

C.Light oil

D.Fuel oil

Which factor determines the ring dam size for a fuel oil, tubular bowl type, centrifugal purifier?

A.The viscosity of the fuel.

B.The quantity of water to be removed from the fuel.

C.The specific gravity of the fuel.

D.The quantity of dirt to be removed from the fuel.

Which of the following problems may be encountered by using an oil having a viscosity higher than that specified for an operating hydraulic system?

A.External seal leakage

B.Hunting due to fast response

C.Hydraulic oil film breakdown

D.Increased power consumption

Which of the following is NOT on the list items to be recorded in Oil Record Book Part I (machinery space operation)?

A.accidental discharge of oil

B.disposal of oil residues

C.quantity of water produced by F.W.G

D.discharge of dirty ballast or cleaning water from fuel oil tanks

Which of the following represents the significance the fuel oil cetane number?

A.The cetane number has no affect on injection lag

B.The cetane number is an indication of the fuel's viscosity

C.Ignition lag is reduced with fuels having a high cetane number

D.The cetane number is of little significance in the combustion process