Answer questions without looking back. This is a closed book exam. Base your answers on the information provided in these past chapters.
1- While starting up your car at 75 F, mid-winter in Florida, which of these synthetic oils provides the least startup resistance, minimal battery and starter motor load?
2- While vacationing in Orlando, it is 104 F mid-summer in Florida. The rental car company put a straight mineral based 30 weight oil in their car because they wanted the operating temperature viscosity to be at 10 cS. What will be the approximate viscosity of the oil when you start up your engine now? (Closest answer)
3- While vacationing in Florida you are able to race your car at the Sebring track. At an oil temperature of 302 F what is the approximate difference in viscosity between a 20 and 40 weight oil. (Pick the closest number)
4- Assume there are no losses in the system and your oil pump is truly volume based. Also assume there is no cut off pressure valve and you are using a 40 weight motor oil. If at 1,000 RPM your pressure is 30 and your pump output is 1 (one), what will the pressure and output be at redline, 8,000 RPM?
5- Water can be used as a lubricant.
6- If you increase the pressure in a bearing, all other things being constant, the force of separation between the parts increases.
7- The best weight oil for racing any Ferrari or Lamborghini is a 40 weight multigrade synthetic oil like Mobil One 0W-40.
8- For my Maranello 575 the 0W-20 weight Mobil 1 oil is actually too thick for my driving conditions.
9- The major problem with engine oil is that it thins with increasing temperature.
10- Your 1993 sports car manual states to use an API / SAE SH rated 10W-40 mineral based motor oil. Your engine has only 1,550 miles on the odometer. On your next oil change it would be better to use a SM rated 0W-40 synthetic oil.
11- According to SAE J300 a 30 weight oil has a viscosity of between 9.3 and 12.4 centiStokes at operating temperature (212 F).
12- In my list of recommended oils what did I list as the best mineral based motor oil in the 50 weight class?
13- You are running 5W-40 Shell Helix Ultra fully synthetic motor oil in your Mercedes Benz. You are in a K-Mart shopping center and checked your oil and it is 1 1/2 quarts low. You will need to add one can of oil. Which of the following is the best choice.
14- Motor oils that are labeled "for racing only" should not be used for everyday driving because:
15- ASTM stands for:
16- If your engine is running too hot at higher RPM one thing you can try to bring the temperature down is to use a thinner oil.
17- Oil with a startup thickness of 100 (at 75 F) that becomes the appropriate thickness of 10 when fully warmed up (212 F) is called a 10W-30 weight motor oil.
18- A main advantage that the synthetic has over the mineral based oil of the same grade is the ability to lubricate better at startup.
19- In ASTM D 4485 3.1.4: Engine oil is defined as - - "a liquid that reduces friction and wear between moving parts within an engine, and also serves as a coolant."
20- I am (single best answer):