Title: Unit 2 Quiz
Course: ENGY 131 Biodiesel Production > Section: ENGY 131 Biodiesel Production

Q: Biodiesel is a crude oil by-product of gas refining.
- True
- False
A: False

Q: The diesel engine is used in heavy industry and highway transportation due to which of the following reasons?
- Engine durability
- High torque capacity
- Fuel efficiency
- All of the above
A: All of the above

Q: The diesel is a spark-ignited engine where the fuel and air are inducted into the engine cylinder, compressed, then ignited by a spark.
- True
- False
A: False

Q: Biodiesel reduces the amount of soot produced during the diesel combustion process.
- True
- False
A: True

Q: NOx is associated with high gas temperatures and lean fuel NOx can increase when biodiesel is used.
- True
- False
A: True

Q: The cetane number is a measure the readiness of a fuel's autoignition tendencies and is regulated by ASTM D 613.
- True
- False
A: True

Q: The energy content of biodiesel is controlled during manufacturing.
- True
- False
A: False

Q: A fuel with a lower energy content per liter will cause the engine to produce less peak power.
- True
- False
A: True

Q: Biodiesel has a low concentration of aromatics whereas petroleum-diesel's aromatic content is very high.
- True
- False
A: False

Q: Due to its lower energy content, biodiesel may produce 8-12% less power than petroleum-based diesel.
- True
- False
A: True

Q: Sulfur oxides react with water vapor to form what compound that is limited by the EPA to 15 ppm?
- NOx
- Sulfuric acid
- Pure sulfur
- Sulfurosis
A: Sulfuric acid

Q: Biodiesel from soybean oil is very low in sulfur.
- True
- False
A: True

Q: Wax crystals are a result during normal engine temperature operation.
- True
- False
A: True

Q: The cloud point of a fuel is its tendency to do which of the following?
- Eliminate the need for exhaust after-treatments.
- Clean fuel filters
- The tendency for small amounts of long-chain hydrocarbons, known as waxes, to crystallize at low operating temperatures.
- All of the above
A: The tendency for small amounts of long-chain hydrocarbons, known as waxes, to crystallize at low operating temperatures.

Q: The Pour Point (PP) is a measure of the tendency of a diesel fuel to become a gas.
- True
- False
A: False

Q: If fuel viscosity is extremely excessive, as with vegetable oils, there will be a degradation of the spray in the cylinder causing which of the following?
- Poor atomization
- Contamination of the lubricating oil
- Black smoke will be produced
- All of the above
A: All of the above

Q: Water damage is the leading cause of premature failure of fuel injection systems.
- True
- False
A: True

Q: Petroleum-based diesel fuel can absorb approximately 50 ppm of dissolved water, whereas biodiesel can absorb as much as 1500 ppm.
- True
- False
A: True

Q: Biodiesel is less susceptible to oxidative degeneration than petroleum-based diesel fuel due to its high concentration of unsaturated compounds.
- True
- False
A: False

Q: ASTM D 482 is used to determine ash content in diesel fuel.
- True
- False
A: True

Q: The volatility of both Diesel No. 1 and Diesel No. 2 are low enough that the air-vapor mixture above the fuel is below the flammability limit.
- True
- False
A: True

Q: The Scuffing Load Ball on Cylinder Lubricity Evaluator and the High Frequency Reciprocating Rig are the two methods used to determine fuel lubricity.
- True
- False
A: True

Q: Biodiesel has poor lubricity.
- True
- False
A: False

Q: Biodiesel is a very low fire hazard.
- True
- False
A: True

Q: The operating principles of a diesel engine are very different from those of a spark-ignited engine.
- True
- False
A: True