Fundamentals of Lubes

Question 1

WHAT DOES R & O STAND FOR?

Answer 1

RUST AND OXIDATION.

Question 2

WHAT DOES EHL STAND FOR?

Answer 2

ELASTROHYDRODYNAMIC LUBIRICATION

Question 3

WHAT IS A CENTISTOKE (cSt)?

Answer 3

The measurement unit for kinematic viscosity. It is the absolute viscosity divided by the fluid density.

Question 4

AW?

Answer 4

ANTI-WEAR

Question 5

SAE?

Answer 5

SOCIETY OF AUTOMOTIVE ENGINEERS.

Question 6

OXIDATION?

Answer 6

THE CHEMICAL COMBINATION OF A SUBSTANCE WITH OXYGEN. ALL PETRO PRODUCTS ARE SUBJECT TO OXIDATION, WITH RESULTANT DEGRADATION OF THEIR COMPOSITION AND PERFORMANCE. THE PROCESS IS ACCELERATED BY HEAT, LIGHT, METAL CATALYST, WATER ACIDS, OR SOLID CONTAMINANTS.

OXIDATION CAN BE MINIMIZED BY GOOD MAINT OF OIL AND EQUIP TO PREVENT CONTAMINATION AND EXCESSIVE HEAT.

Question 7

WHAT IS CARBON RESIDUE?

Answer 7

MATERIAL THAT REMAINS AFTER AN OIL HAS BEEN SUBJECTED TO HIGH TEMPS.

Question 8

WHAT IS PUMP-ABILITY?

Answer 8

THE ABILITY OF AN OIL OR GREASE TO FLOW UNDER ACTUAL OPERATING TEMPERATURES. ESPECIALLY IMPORTANT IN LONG LINE GREASE SYSTEMS AND OIL CIRCULATION SYSTEMS, OR UNDER COLD OPERATING TEMPS.

Question 9

WHAT IS OXIDATION INHIBITOR (ADDITIVE)?

Answer 9

SUBSTANCES ADDED IN SMALL QUANTITIES TO A LUBRICANT TO INCREASE OXIDATION RESISTANCE.

Question 10

WHAT DOES ASTM STAND FOR?

Answer 10

AMERICAN SOCIETY FOR TESTING MATERIALS.

Question 11

WHAT DOES NLGI STAND FOR?

Answer 11

NATIONAL LUBRICATING GREASE INSTITUTE.

Question 12

WHAT DOES ISO STAND FOR?

Answer 12

INTERNATIONAL STANDARDS ORGANIZATION.

Question 13

WHAT IS A INHIBITOR?

Answer 13

USUALLY AN ADDITIVE USED IN OILS & GREASES TO ENHANCE THE LUBRICANTS ABILITY TO PERFORM UNDER CERTAIN CONDITIONS.

EXAMPLE: AN OXIDATION INHIBITOR HELPS INCREASE THE USEFUL LIFE OF AN OIL BY MINIMIZING THE HARMFUL REACTION OF OXYGEN IN THE AIR WITH OIL MOLECULES.

Question 14

DETERGENTS?

Answer 14

AN IMPORTANT COMPONENT OF ENGINE OILS THAT HELPS CONTROL VARNISH, RING ZONE DEPOSITS, AND RUST BY KEEPING INSOLUBLE PARTICLES IN SUSPENSION AND IN SOME CASES, BY NEUTRALIZING ACIDS.

Question 15

AGMA?

Answer 15

AMERICAN GEAR MANUFACTURERS ASSOCIATION.

Question 16

WHAT IS VISCOSITY?

Answer 16

MEASUREMENT OF A FLUIDS ABILITY TO FLOW

Question 17

TBN?

Answer 17

TOTAL BASE NUMBER-

OILS ABILITY TO NEUTRALIZE ACIDS AND ULTIMATELY EXTEND OIL LIFE.

Question 18

DEMULSIBILITY?

Answer 18

A MEASURE OF THE ABILITY OF AN OIL TO SEPARATE FROM WATER.

Question 19

SHEAR STABILITY?

Answer 19

USUALLY USED AS THE MEASURE OF PERFORMANCE OF VI IMPORVERS IN MULTI-VISCOSITY ENGINE AND GEAR OILS. VI IMPROVERS ARE USUALLY POLYMER ADDITIVES WHICH CAN SHEAR INTO SMALLER MOLECULES IF THE ADDITIVE IS NOT SHEAR STABLE. THE SHEARING WILL REDUCE THE HIGH TEMP OF VISCOSITY OF THE OIL.

EXAMPLE: 10W-40 COULD SHEAR TO A 10W-30 IN A SERVICE IF THE VI IMPROVER WAS NOT STABLE UNDER STRESSFUL OPERATING CONDITIONS.

Question 20

EMULSIBILITY?

Answer 20

THE DEGREE TO WHICH AN OIL FORMS AN EMULSION TO WATER.

Question 21

LUBRICITY?

Answer 21

THE ABILITY OF AN OIL OR GREASE TO LUBRICATE. ALSO CALLED FILM STRENGTH. LUBRICITY CAN BE ENHANCED BY ADDITIVES.

Question 22

WHAT IS EP (EXTREME PRESSURE)?

Answer 22

AN ADDITIVE WHICH FORMS PROTECTIVE FILMS ON A METALIC BEARING SURFACE TO HELP PREVENT METAL ON METAL CONTACT IF THE OIL FILM RUPTURES.

THESE ADDITIVES ARE USUALLY PHOSPHORUS, SULFUR, OR CHLORINE COMPOUNDS WHICH BONDS OR REACTS CHEMICALLY WITH THE METALS AT OPERATING TEMPS.

Question 23

POUR POINT?

Answer 23

THE LOWEST TEMP AT WHICH AN OIL WILL FLOW UNDER PRESCRIBED CONDITIONS.

Question 24

WHAT IS TAN?

Answer 24

TOTAL ACID NUMBER

Question 25

DISPERSANT (ADDITIVE)?

Answer 25

AN ENGINE OIL ADDITIVE THAT HELPS PREVENT SLUDGE, VARNISH, AND OTHER ENGINE DEPOSITS BY KEEPING PARTICLES SUSPENDED.

Question 26

WHAT DOES SUS STAND FOR?

Answer 26

SAYBOLT UNIVERSAL SECONDS.