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Study Questions > Transportation > Flashcards

Transportation Flashcards

0
Q

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

A

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.

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1
Q

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

A

Wheel bearings - GC

Chassis - LB

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2
Q

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

A

American Petroleum Institute Certified for Gasoline Engines

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3
Q

What are the three designations found on the API donut?

A

API service classification, SAE grade, and energy conserving level

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4
Q

What are the most current API service classifications?

A

CJ-4

SN

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5
Q

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

A

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

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6
Q

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

A

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.

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7
Q

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

A

“S” stands for “Service” in spark engines

“C” stands for “Commercial” in compression engines

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8
Q

What does the “W” signify in 10W-30?

A

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

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9
Q

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

A

SAE 15W-40

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10
Q

What does API stand for?

A

American Petroleum Institute

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11
Q

What does ILSAC stand for?

A

International Lubricant Standardization and Approval Committee

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12
Q

What does SAE stand for?

A

Society of Automotive Engineers

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13
Q

What does OEM stand for?

A

Original Equipment Manufacturer

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14
Q

What does ATF stand for?

A

Automatic Transmission Fluid

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15
Q

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

A

Intake
Compression
Power
Exhaust

16
Q

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

A

High Temperature High Shear

Multi-grade engine oils

17
Q

What are three important properties of an ATF?

A 
ATF (Automotive Transmission Fluid)
Frictional characteristics
Oxidation stability
Low temperature fluidity
Anti-wear
OEM approval
18
Q

What are four reasons for high oil consumption?

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

Study Questions (17 decks)

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