WorksheetsDiesel Fuel Characteristics
Total questions: 30
Worksheet time: 16mins
What was the original fuel choice for Rudolph Diesels CI engine?
Coal Dust
Peanut Oil
Kerosene
Diesel Fuel
A good quality uncontaminated fuel for engines means that fuel is rarely the cause of an engine issue.
True
False
What is the term whose meaning is a measure of the ignition quality of Diesel Fuel?
Octane
Heating Value
ULSF
Cetane Number
How is diesel fuel manufactured?
Occurs naturally
waste product of better fuels like gas
Fractional Distillation
reverse osmosis
Engine Performance factors which are influenced by the ignition quality of fuel are cold starting, engine warm up, rough running, acceleration, and _______________.
exhaust smoke density
easy starting
running hot
timing issues
Sulphur has to be added to diesel fuel to give it an odor for safety purposes.
True because diesel fuel is clear and odorless.
False, Sulphur occurs naturally in diesel fuel
True because it is mandated by the EPA
In 1993 the EPA mandated that the Sulphur content of diesel fuel could not exceed ______ PPM.
1000
1500
15
500
It has been determined that the reduction of Sulphur in diesel fuel results in _________________________. (Select all that apply)
lower emissions
higher emissions
engine longevity
high engine wear
Cloud point is __________.
when it starts to rain
the point that fuel is to contaminated with water to burn.
the temperature that crystals start forming in diesel fuel.
the temperature that diesel fuel ceases to flow.
Pour point is __________.
when it starts to rain
the point that fuel is to contaminated with water to burn.
the temperature that crystals start forming in diesel fuel.
the temperature that diesel fuel ceases to flow.
What is Lubricity?
a fuel’s lubricating qualities provided by fats and waxes
a type of microorganism that grows in fuel
water in fuel
Freeze point of diesel fuel
•Biodiesel: any fuel made from _____ or _______ material.
synthetic oil / Petroleum
Plants / animal
recycled oil / compounded chemical
Diesel fuel additives are_______.
tested extensively
certified by the government
required to substantiate their claims
Not required to substantiate claims
B100 is ____________.
British Petroleum 100 % fuel
Pure Diesel Fuel
Pure BioDiesel
Octane rating of Diesel
The current rating for Sulphur content in diesel fuel must be no higher than ______PPM.
15
500
50
150
What is the minimum cetane (CN) for on highway diesel fuel?
30
40
45
50
Technician A says diesel engines are the most efficient combustion systems in use today. Technician B says that, compared to other engines, diesel engines convert burning fuel into the most mechanical energy. Who is correct?
Select one:
TECH A
TECH B
BOTH TECH A & B
NEITHER TECH
Which of the following is correct concerning combustion in diesel engines?
Select one:
a. Among all engines, diesel engines are the most efficient combustion systems.
b. Air-fuel ratio, compression pressure, temperature, injection timing, and combustion chamber design are all critical variables that affect engine operation.
c. Both A and B
d. Neither A nor B
What is ULSD?
Ultra light special Diesel
Ultra Low Sulphur Diesel
Ultra light synthetic diesel
Unleaded synthetic diesel
Technician A says biodiesel is manufactured from algae. Technician B says biodiesel is manufactured from beef tallow and soybeans. Who is correct?
Select one:
TECH A
TECH B
BOTH TECH A & B
NEITHER TECH
__________ was used to make the first biodiesel fuel.
a. Soybean
b. Corn
c. Vegetable oil
d. Peanut oil
Technician A says coal dust was the original diesel fuel. Technician B says the first biodiesel fuel was made out of peanut oil. Who is correct?
Select one:
TECH A
TECH B
BOTH TECH A & B
NEITHER TECH
Who regulates diesel and Biodiesel fuel quality?
ASMT (American Society of Metering & Testing)
ABCD (American Bio-fuel Caloric Determination)
ASTM (American Society for Testing and Materials)
APHIS (Animal and Plant Health Inspection Service)
________ is the point at which fluid (diesel fuel in this instance) stops flowing when cooled.
Cetane
Cloud Point
Purple 77
Pour Point
The grade of diesel fuel can be identified by a technician by measuring fuel’s density with a ___________.
Hydrometer
Pyrometer
Parkingmeter
Halon meter
Which of the following statements is correct?
Select one:
Reducing sulfur in diesel reduces emission of particulate matter in most diesel engines
Biodiesel has little to no sulfur
Both A & B are correct
Neither A & B is correct
A fuel with a high flash point is ________.
Select one:
very volatile
not for use in a C.I. engine
not for use in a S.I. engine
very safe to handle
Technician A says that diesel engine combustion efficiency is typically less than 75% when using fuel without additives. Technician B says that when clean, good-quality fuel is used, there is no need to add anything to fuel. Who is correct?
Select one:
Tech A
Tech B
Both Techs
Neither tech
Diesel fuel additives may include but are not limited to ________.
Select one:
Technician A says that a purpose-made fuel hydrometer is used to measure the API number of diesel fuel. Technician B says fuel's API number is directly related to the fuels grade. Who is correct?
Select one:
Tech A
Tech B
Both Techs
Neither tech
