Exam (elaborations)
MLT 1 quiz.
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- 126 MTTC English As A Second Language
Exam of 8 pages for the course 126 MTTC English as a Second Language at 126 MTTC English as a Second Language (MLT 1 quiz.)
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MLT 1 quizName the two most common types of mineral base oils. - ANS-Paraffinic. Naphathenic
What unit of measure is used with flash point and pour point? - ANS-Temperature
Is the specific gravity of a mineral oil typically higher or lower than synthetic lubricants? -
ANS-Lower
Which has a higher VI, a PAO or a solvent-refined (Group I) mineral oil? - ANS-PAO
When an oil oxidizes, how does it's viscosity typically change? - ANS-It goes up.
In the SAE crankcase viscosity classification 0W-30, what does the W stand for? -
ANS-Winter
Of the following motor oils, which oil is best suited for cold start conditions?
• SAE 15W-50
• SAE 40
• SAE 20
• SAE 0W -30 - ANS-SAE 0W-30
When a SAE 20 is blended with a SAE 40, will the resulted viscosity be closer to SAE
30 or SAE 60? - ANS-SAE 30
Name four possible benefits of using synthetic base oil as a lubricant. - ANS-Better
thermal stability, high VI, lower pour point, natural detergency (some cases), fire
resistance (some cases).
Name the synthetic base oil that is widely used as crankcase oil and is mixable with
mineral oil. - ANS-Polyalphaolefin (PAO)
Name 3 fluids that are used as fire resistant hydraulic fluids. - ANS-Phosphate ester,
water glycol, oil-water emulsions
What types of synthetics are at risk for water-induced degradation called hydrolysis? -
ANS-Esters such as phosphate ester, polyol ester, dibasic acid eater
, What is a common cause of seal swell or seal shrinkage? - ANS-Incompatibility with
case oil and/ or additives.
What does API stand for? - ANS-American Petroleum Institute
What does ASTM stand for? - ANS-American Society for Testing and Materials
Which of the following would be considered a white oil?
•Group III Hydrocracked Mineral Oil
•Group IV PAO Synthetic - ANS-Both
Which of the following would have the highest VI?
•PAO
•Hydrocracked Mineral Oil
•Solvent refined paraffinic
•Phosphate ester - ANS-PAO
T/F: A mineral base oil that has a lot of aromatics and sulfur is less prone to oxidation. -
ANS-False
T/F: Mineral base oils that have a very high VI are more prone to dissolve additives. -
ANS-False
Name 4 impurities of mineral oils that are removed in the refining process. - ANS-•Salt
•Wax
•Aromatics
•Sulfur Compound
•Nitrogen Compounds
•Solids
•Water
What concentration of additives might be found in typical Diesel engine crankcase oil? -
ANS-10 to 30%
Name 3 types of polar activities. - ANS-•Dispersants
•Detergents
•AW additives
•EP additives
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