Deck 68: Diesel and Biodiesel Fuels

Question 1

Which is TRUE of biodiesel fuel?

A)Reduces carbon monoxide emissions
B)Reduces hydrocarbon emissions
C)Reduces particulate matter in emissions
D)All of these

Answer 1

All of these

Question 2

What clogs fuel filters when the temperature is low on a vehicle that uses diesel fuel?

A)Wax
B)Cetane
C)Sulfur
D)Alcohol

Answer 2

Wax

Question 3

The specific gravity of diesel fuel is measured in what units?

A)Hydrometer units
B)API gravity
C)Cetane number
D)Grade number

Answer 3

API gravity

Question 4

What rating of diesel fuel indicates how well a diesel engine will start?

A)Cetane rating
B)Sulfur content
C)Specific gravity rating
D)Cloud point

Question 5

Ultra-low-sulfur diesel fuel has how much sulfur content?

A)500 PPM
B)50 PPM
C)1500 PPM
D)15 PPM

Question 6

E-diesel is diesel fuel with what additive?

A)Methanol
B)Sulfur
C)Vegetable oil
D)Ethanol

Question 7

Biodiesel is regular diesel fuel with vegetable oil added.

Question 8

B20 biodiesel has how much regular diesel fuel?

A)80 percent
B)100 percent
C)20 percent
D)40 percent

Question 9

Most diesel fuel is what grade?

A)Grade 4
B)Grade 3
C)Grade 2
D)Grade 1

Question 10

Most manufacturers of vehicles equipped with diesel engines allow what type of biodiesel?

A)B20
B)B100
C)B80
D)B5

Question 11

Diesel fuel should be rated at what cetane rating?

A)87
B)25-30
C)91+
D)45-50

Question 12

The higher the cetane rating, the ________.

A)Easier the engine starts when cold
B)More power the engine produces
C)Easier the engine starts when hot
D)Both B and C

Question 13

The API gravity of diesel fuel should be about ________.

A)25
B)45
C)15
D)35

Question 14

Technician A says that diesel fuel has more heat energy than gasoline. Technician B says that grade 2 is the grade recommended for normal service in automotive diesel engines. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 15

Specifications for diesel fuel include ________.

A)Pour point
B)Flash point
C)Cloud point
D)All of the above

Question 16

Ultra low-sulfur diesel has a maximum of ________ parts per million of sulfur.

A)10
B)15
C)5
D)20

Question 17

A biodiesel blend that has 5% biodiesel in conventional fuel is called ________.

A)D5
B)B5
C)D95
D)B95

Question 18

Vegetable oil is sometimes called ________.

A)SVO
B)WVO
C)PPO
D)All of the above

Question 19

Diesel fuel mixed with ethanol is called ________ in the United States

A)GTL Diesel
B)E-Diesel
C)Diesohol
D)FTD

Question 20

The specific gravity of diesel fuel should be measured whenever a driveability concern is present.

Question 21

What is used to test the specific gravity of diesel fuel?

A)Gas chromatograph
B)API hydrometer
C)Spectrometer
D)None of these

Question 22

The heat energy released from the combustion process is expressed in ________.

A)Calories
B)BTUs
C)Fahrenheit
D)None of these

Question 23

Which grade of diesel fuel is best suited for cold weather operation?

A)Grade 3
B)Grade 1
C)Grade 2
D)None of these

Question 24

What term describes the process where wax crystals form in diesel fuel, clogging fuel filters?

A)Cloud point
B)Pour point
C)Flash point
D)None of these

Question 25

Diesel emission control systems require ultra-low sulfur diesel fuel starting in ________.

A)1996
B)1992
C)2007
D)None of these

Question 26

Which is TRUE regarding red colored diesel fuel?

A)It is designed for off road use only
B)Use as fuel for vehicles driven on public highways is illegal
C)Both A and B
D)Neither A nor B

Question 27

Signs of gasoline contamination of a diesel fuel system include ________.

A)Excessive white smoke
B)Rough engine operation
C)High combustion temperatures
D)Any of these