WorksheetsIntroduction to Diesel Mechanics
Total questions: 40
Worksheet time: 3hrs 20mins
Name
Class
Date
1.
The nozzle rator is used to determine and set the injector nozzle pop-off pressure
a)
TRUE
b)
FALSE
2.
The nozzle rator is used to make sure the injectors drip a little bit right before they pop off.
a)
TRUE
b)
FALSE
3.
Another reason to use the nozzle rator is to determine if the spray pattern is correct
a)
TRUE
b)
FALSE
4.
Diesel is a petroleum based fuel with a higher energy content then gasoline.
a)
TRUE
b)
FALSE
5.
Gasoline is a safer fuel and that is why they are so many more gasoline cars than diesel.
a)
TRUE
b)
FALSE
6.
Diesel is less flammable and explosive than gasoline because it has a much lower flashpoint.
a)
TRUE
b)
FALSE
7.
Diesel fuel uses the heat of compression to ignite the fuel
a)
TRUE
b)
FALSE
8.
Diesel engines uses the glowplugs to provide the spark necessary to ignite diesel fuel.
a)
TRUE
b)
FALSE
9.
Common-rail Fuel Injection is what most modern diesel engines use
a)
TRUE
b)
FALSE
10.
Today's diesel engines are dirtier and cause more pollution than do the gasoline engines
a)
TRUE
b)
FALSE
11.
Diesel engines provide better fuel economy than gasoline engines
a)
TRUE
b)
FALSE
12.
Sulfur content in diesel fuel are higher in Europe than here in the United States.
a)
TRUE
b)
FALSE
13.
Ultra-low sulfur diesel costs alot more that making regular diesel.
a)
TRUE
b)
FALSE
14.
94% of all goods shipped in the U.S. are shipped using diesel power.
a)
TRUE
b)
FALSE
15.
Diesel exhaust emissions are rated using a Tier system.
a)
TRUE
b)
FALSE
16.
Big over the road diesel engines are mandated to have a useful life of at least 490,000 miles.
a)
TRUE
b)
FALSE
17.
The latest engines using DEF are Tier 5 engines.
a)
TRUE
b)
FALSE
18.
What happens to air when it is compressed?
a)
cools down
b)
heats up
c)
no temperature change
19.
Which of the following is a compression ratio found in diesel motors?
a)
6:1
b)
8.5:1
c)
40:1
d)
15:1
20.
Too much fuel in the Air to fuel Ratio is known as ___________
a)
lean
b)
rich
c)
wet
d)
saturated
21.
When is diesel fuel injected into the combustion chamber?
a)
Intake stroke
b)
Compression stroke
c)
Beginning of the power stroke
d)
Near the top of the compression stroke
22.
Diesel fuel is introduced into the combustion chamber through which component?
a)
Fuel line
b)
Injector
c)
Fuel pump
d)
Carburetor
23.
Which of the following methods are ways to inject diesel fuel
a)
Crankshaft Driven Fuel Pump
b)
Common-rail fuel injection
c)
Unit injection
d)
A, B, & C
24.
Today's diesel fuel is called ___________________
a)
Low Sulfur Diesel
b)
Low Sodium Diesel
c)
Ultra-low Sodium Diesel
d)
Ultra-low sulfur Diesel
25.
Today's Diesel Fuel contains ____ to ____ parts per million sulfur.
a)
50 to 100
b)
0 to 10
c)
15 to 30
d)
100 to 500
26.
Is this component is carrying diesel fuel at low pressure or high pressure under normal operating conditions? Fuel line from fuel tank to fuel transfer pump
a)
low pressure
b)
high pressure
27.
Is this component is carrying diesel fuel at low pressure or high pressure under normal operating conditions? Fuel line from fuel transfer pump to fuel filters
a)
low pressure
b)
high pressure
28.
Is this component is carrying diesel fuel at low pressure or high pressure under normal operating conditions? Fuel line from fuel filters to injection pump
a)
low pressure
b)
high pressure
29.
Is this component is carrying diesel fuel at low pressure or high pressure under normal operating conditions? Fuel line from injection pump to injectors
a)
low pressure
b)
high pressure
30.
Is this component is carrying diesel fuel at low pressure or high pressure under normal operating conditions? Return line from injectors to fuel tank
a)
low pressure
b)
high pressure
31.
Match the technology for today's state of the art diesel engines: Unit injectors
a)
Newest engine technology
b)
Old diesel technology
32.
Match the technology for today's state of the art diesel engines: Electronic controls
a)
Newest engine technology
b)
Old diesel technology
33.
Match the technology for today's state of the art diesel engines: Common-rail fuel injection
a)
Newest engine technology
b)
Old diesel technology
34.
Match the technology for today's state of the art diesel engines: Direct injection
a)
Newest engine technology
b)
Old diesel technology
35.
Match the technology for today's state of the art diesel engines: Catalytic convertors
a)
Newest engine technology
b)
Old diesel technology
36.
Match the technology for today's state of the art diesel engines: Variable Injection Timing
a)
Newest engine technology
b)
Old diesel technology
37.
Match the technology for today's state of the art diesel engines: Improved Combustion Chamber Configurations
a)
Newest engine technology
b)
Old diesel technology
38.
Match the technology for today's state of the art diesel engines: Naturally aspirated air intake systems
a)
Newest engine technology
b)
Old diesel technology
39.
Match the technology for today's state of the art diesel engines: Particulate trap exhaust system
a)
Newest engine technology
b)
Old diesel technology
40.
Match the technology for today's state of the art diesel engines: Oxidation Catalyst exhaust system (DEF)
a)
Newest engine technology
b)
Old diesel technology
100 %
