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Discussion Starter #1
Answer questions without looking back. This is a closed book exam. Base your answers on the information provided in these past chapters.

1- At normal operating temperature, 212 F, a straight 30 weight oil has a viscosity of how many centiStokes?
A- 3
B- 6
C- 10
D- 20
E- 30

2- While racing at 95 F, mid-summer in Florida, which of these synthetic oils gives the best protection at 302 F oil temperature?
A- 0W-40
B- 5W-40
C- 10W-40
D- Strainght 40 weight
E- They are all exactly the same

3- While starting up your car at 75 F, mid-winter in Florida, what is the approximate viscosity of a straight 10 (ten) weight motor oil?
A- 3 cS
B- 6 cS
C- 10 cS
D- 20 cS
E- 30 cS or higher

4- The biggest problem with mineral based motor oils with long tern use is:
A- Thinning
B- Thickening
C- Loss of VI (viscosity index) improvers
D- Both A and C
E- None of the above is correct

5- Which of the following mineral based motor oils are still too thick at a 75 F startup temperature?
A- 20 weight
B- 10 weight
C- 5 weight
D- All of the above
E- None are too thick
 

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Somehow I knew this was coming. :) Good doctor, you are Da Man.... Thank you for all the technical info you've posted.
 

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Anyone that gets them all right without looking back get to stay at the Doc's house for a week!! :D
 

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Discussion Starter #5
Answers to Midterm Exam

Answers to the Oil Midterm Exam
I feel these were all difficult questions. You would be doing well to get 3 correct.

1- At normal operating temperature, 212 F, a straight 30 weight oil has a viscosity of how many centiStokes?
A- 3
B- 6
C- 10
D- 20
E- 30
The correct answer is C- 10 cS.

2- While racing at 95 F, mid-summer in Florida, which of these synthetic oils gives the best protection at 302 F oil temperature?
A- 0W-40
B- 5W-40
C- 10W-40
D- Straight 40 weight
E- They are all exactly the same
The correct answer is E- They are all exactly the same.

3- While starting up your car at 75 F, mid-winter in Florida, what is the approximate viscosity of a straight 10 (ten) weight motor oil?
A- 3 cS
B- 6 cS
C- 10 cS
D- 20 cS
E- 30 cS or higher
The correct answer is E- 30 cS or higher.

4- The biggest problem with mineral based motor oils with long tern use is:
A- Thinning
B- Thickening
C- Loss of VI (viscosity index) improvers
D- Both A and C
E- None of the above is correct
The correct answer is B- Thickening

5- Which of the following mineral based motor oils are still too thick at a 75 F startup temperature?
A- 20 weight
B- 10 weight
C- 5 weight
D- All of the above
E- None are too thick
The correct answer is D- All of the above
 
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