Octane

Based on Tabler 1, if 1 mL of heptane was mixed with the 7 mL of isooctane; the octane rating of this mixture at 500 ppm would be which of the following?

• 3

• 7

• 10

• 70

According to Experiment 3, an engine rpm increases the EOR:

• decreases

• increases

• decreases then increase

• increases then decrease

Tags

NGSS.MS-PS3-4

Based on Experiment 2 and Table 1, if 4 mL of TEL were added to a mixture of 800 mL of isooctane and 200 mL of heptane, what would be the most likely octane rating of the resulting fuel?

• Less than 50.

• Between 50 and 80.

• Between 80 and 125.

• Greater than 125.

Tags

NGSS.HS-ETS1-3

Suppose a trial had been performed during Experiment 3 at a speed of 2250 rpm. Given this speed which of the following octane rating would most likely be accurate for Fiuel A and Fuel B? (Fuel A/Fuel B)

• 96.9/97.8

• 95.2/96.7

• 97.4/98.1

• 96.0/96.9

Question 5 is numbered Question 21 on your sheet. Choose the space that corresponds tot he correct answer.

• A

• B

• C

• D

In Experiment 3, assuning that the engiine will remain functional at speeds between 1000 rpm and 3000 rpm, which of the two fuels would be better for the engine to use?

• Fuel A, because it has an octane rating higher than the EOR for all engine speeds.

• Fuel A, because it has an engine rating lower than the EOR for all engine speeds.

• Fuel B, because it has an octane rating higher than the EOR for all engine speeds.

• Fuel B, because it has an octane rating lower than the EOR for all engine speeds.

Tags

NGSS.HS-ETS1-1

NGSS.HS-ETS1-3