Ohio Biofuel Technician Exam Questions 2026 | Verified Q&A with Rationales

OHIO BIOFUEL TECHNICIAN EXAM
b b b




PRACTICE QUESTIONS AND CORRECT b b b




ANSWERS (VERIFIED ANSWERS) PLUS
b b b b




RATIONALES 2026 Q&A | INSTANT
b b b b b




DOWNLOAD
b




1. What is the primary feedstock used in biodiesel production in the
b b b b b b b b b b b


United States?
b b


a) Corn starch b


b) Soybean oil b


c) Sugarcane
d) Switchgrass
Soybean oil is the most common feedstock for biodiesel in the U.S. due to its
b b b b b b b b b b b b b b


high oil yield and availability.
b b b b b




2. Which process is used to convert oils and fats into biodiesel?
b b b b b b b b b b


a) Fermentation
b) Transesterification
c) Hydrogenation
d) Pyrolysis
Transesterification converts triglycerides into methyl esters (biodiesel) and
b b b b b b b


glycerol.
b




3. What is the main byproduct of biodiesel production?
b b b b b b b


a) Methanol
b) Ethanol
c) Glycerin
d) Carbon dioxide b


Glycerin is a byproduct formed when triglycerides react with alcohol during
b b b b b b b b b b


biodiesel synthesis.
b b

,4. What is the energy content of biodiesel compared to petroleum diesel?
b b b b b b b b b b


a) Higher
b) Slightly lower b


c) Equal
d) Twice as much b b


Biodiesel contains about 8–10% less energy per gallon than petroleum
b b b b b b b b b


diesel.
b




5. Ethanol is primarily produced by fermenting which material?
b b b b b b b


a) Vegetable oils b


b) Cellulose
c) Sugars and starches b b


d) Algae
Ethanol production relies on fermentable sugars or starches from corn,
b b b b b b b b b


sugarcane, or grains.
b b b




6. Which microorganism is most commonly used in ethanol fermentation?
b b b b b b b b


a) Bacteria
b) Yeast (Saccharomyces cerevisiae)
b b


c) Algae
d) Fungi
Yeast converts sugars into ethanol and carbon dioxide during fermentation.
b b b b b b b b b




7. What is the flash point of biodiesel compared to petroleum diesel?
b b b b b b b b b b


a) Lower
b) Higher
c) Same
d) Unstable
Biodiesel’s higher flash point makes it safer to store and handle.
b b b b b b b b b b




8. Which federal agency regulates biofuel quality standards in the U.S.?
b b b b b b b b b


a) USDA
b) DOE
c) EPA
d) DOT
The U.S. Environmental Protection Agency (EPA) enforces renewable fuel
b b b b b b b b


standards and quality compliance.
b b b b

, 9. What ASTM standard applies to biodiesel fuel quality?
b b b b b b b


a) D975
b) D5798
c) D6751
d) D7467
ASTM D6751 sets the specification for biodiesel (B100) used in blends.
b b b b b b b b b b




10. What is the term for blending 20% biodiesel with 80% petroleum diesel?
b b b b b b b b b b b


a) B10
b) B20
c) B80
d) B5
B20 refers to a blend containing 20% biodiesel and 80% petroleum diesel.
b b b b b b b b b b b




11. What is the main benefit of using biodiesel in diesel engines?
b b b b b b b b b b


a) Higher NOx emissions b b


b) Reduced particulate matter and CO emissions
b b b b b


c) Lower lubricity b


d) Reduced fuel economy b b


Biodiesel burns cleaner, reducing carbon monoxide and particulate
b b b b b b b


bemissions.
12. Which alcohol is most commonly used in biodiesel production?
b b b b b b b b


a) Ethanol
b) Methanol
c) Butanol
d) Propanol
Methanol reacts with triglycerides to produce methyl esters (biodiesel).
b b b b b b b b




13. What is the primary goal of the Renewable Fuel Standard (RFS)?
b b b b b b b b b b


a) To increase petroleum imports
b b b


b) To reduce ethanol use
b b b


c) To promote renewable fuel production and reduce greenhouse
b b b b b b b


bgas emissions
b


d) To tax biodiesel production
b b b


The RFS encourages the blending of renewable fuels into transportation
b b b b b b b b b


bfuel.