The pour point of lubricating oils is affected the most by which of the following?（）

A、Extensive centrifuging

B、Wax content

C、Water content

D、Acid content

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更多“The pour point of lubricating oils is affected the most by which of the following?（）”相关的问题

第1题

[] Friction, engine wear and oil consumption in a diesel engine are directly related to the （）.

A、A.acidity of the oil B、B.pour point of the oil C、C.flash point of the oil D、D.viscosity of the oil

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第2题

[单选题] The flash point of a petroleum product is an indication of its（）

A、viscosity B、pour point C、volatility D、lower explosive limit

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第3题

[单选题] The designations A，B，C，D and E grades of cargo refer to the（）.

A、degrees of quality of petroleum products B、flash point range and Reid vapor pressure index of petroleum products C、grades of crude oil D、pour point，color，and viscosity index of petroleum products

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第4题

[单选题] Which of the listed characteristics of lube oil are the most important to the engineer from an operational standpoint?（）

A、Ash content, carbon residue, and gravity B、Viscosity, acidity, and demulsibility C、Pour point, flash, point, and precipitation number D、Auto-ignition point, viscosity index, and film strength

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第5题

[单选题] Two important considerations for the proper lubrication of a diesel engine include the delivery of the oil in sufficient amount and the （）.

A、cetane number B、pour point C、viscosity temperature D、quality of the oil

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第6题

[单选题] Which of the listed factors will indicate the most about the ability of a fuel to ignite in a diesel engine?（）

A、Viscosity B、Sulfur content C、Pour point D、Cetane number

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第7题

[单选题] Properties of a good refrigeration oil include（）

A、low wax content B、high pour point C、high viscosity D、all of the above