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Flashcards in Transportation Deck (19)
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0

List the designations for the top performance level in the NLGI automotive classifications system for chassis and wheel bearing greases.

Wheel bearings - GC
Chassis - LB

1

What is a quick field test used to measure detergency and dispersancy of used internal combustion engine oils?

Oil spot (or patch) test. A crude test where oil is filtered through a patch. If particles are concentrated in the center of the patch, it indicates that water or anti-freeze may be impairing dispersancy.

2

What are the words that are found on the ILSAC (API) starburst?

American Petroleum Institute Certified for Gasoline Engines

3

What are the three designations found on the API donut?

API service classification, SAE grade, and energy conserving level

4

What are the most current API service classifications?

CJ-4
SN

5

An SAE 30 engine oil is approximately __________cSt or _____ SSU.

Approximately 100 cSt (at 40° C) or 500 SSU

6

What is the primary difference between Ford, Chrysler and GM automatic transmission fluids?

The original Ford fluid (pre-1979 vehicles) contained no friction modifier.
Current (Mercon) and GM (DEXRON III) contain friction modifiers. Chrysler MOPAR 7176 (now ATF +3) is formulated to be compatible with friction plate materials in Chrysler transmissions. The newest fluid Ford Type B is semi-synthetic.

7

What do the “S” in SJ and the “C” in CF-4 stand for?

“S” stands for “Service" in spark engines
“C” stands for “Commercial” in compression engines

8

What does the “W” signify in 10W-30?

“W” Winter - It indicates an engine oil's viscosity at low temperatures.

9

In most engine applications, what would exhibit lower oil consumption, SAE 40 or SAE 15W- 40?

SAE 15W-40

10

What does API stand for?

American Petroleum Institute

11

What does ILSAC stand for?

International Lubricant Standardization and Approval Committee

12

What does SAE stand for?

Society of Automotive Engineers

13

What does OEM stand for?

Original Equipment Manufacturer

14

What does ATF stand for?

Automatic Transmission Fluid

15

What are the four strokes of a four stroke cycle engine?

Intake
Compression
Power
Exhaust

16

What is HTHS? What type of application is it considered important?

High Temperature High Shear
Multi-grade engine oils

17

What are three important properties of an ATF?

ATF (Automotive Transmission Fluid)
Frictional characteristics
Oxidation stability
Low temperature fluidity
Anti-wear
OEM approval

18

What are four reasons for high oil consumption?

Too low a viscosity
Stuck
Worn or improperly seated rings
Seal leakage
Leakage around valves