Fuel refined for use in a warmer climate will be _______ resistant to vapor lock.
Question 3
3.
Question 4
4.
Question 5
5.
Question 6
6.
Question 7
7.
Question 8
8.
Question 9
9.
Question 10
10.
The amount of fuel in the float bowl is_______ during consumption, causing the float and inlet needle to _______ , opening the _______ .
Question 11
11.
Question 12
12.
1
1
Question 15
15.
Question 16
16.
Question 17
17.
In a _______ feed system, the fuel tank is positioned _______ the carburetor.
Question 18
18.
Question 19
19.
Question 20
20.
Question 21
21.
Question 22
22.
Question 23
23.
Question 24
24.
Question 25
25.
Question 26
26.
The engine control unit uses information received from various _______ to determine the correct amount of _______ and injection timing based on load, _______ and operator input.
Question 27
27.
Question 28
28.
Question 29
29.
Question 30
30.
Question 31
31.
Question 32
32.
Question 33
33.
Question 34
34.
With the addition of alcohol to gasoline and changes to refinery processes, power equipment manufacturers do NOT recommend storing fuel for more than what length of time?
Two months
Six months
30 days
Three weeks
Which of the following is considered a mid-grade gasoline?
Octane rating equal to 88 and less than or equivalent to 90
Octane rating equal to 85 and less than 88
Octane rating greater than 90
Octane rating equal to 86 and less than or equivalent to 88
Gasoline’s ability to become a vapor correctly defines which of the following terms?
Distillation
Converter
Vapor Lock
Volatility
Which of the following is NOT a benefit of alcohol-based fuels as mentioned in the presentation?
Less carbon deposits
Improves emissions
Boosts octane
Decreases U.S. dependency on imported oil
Which fuel contained more power in our lab?
ethanol (alcohol based fuel)
kerosene (petroleum based fuel)
Which fuel produced the most soot?
ethanol (alcohol based fuel)
kerosene (petroleum based fuel)
What are carburetors used for?
To clean fuel
To combine gasoline and air
To increase octane ratings
To decrease octane ratings
What is the purpose of the float assembly?
To deliver fuel to the carburetor
To allow fuel to enter the fuel bowl
To hold fuel for metering circuits
To control the level of fuel in the fuel bowl
Which of the following accurately describes the venturi effect?
The reduction in pressure resulting in fluid being forced through a constricted passage
When the fuel is allowed to enter the engine at wide open throttle
When fuel is prevented from flowing through the carburetor
The increase in ambient temperature resulting in loss of control
Which of the following exist to limit afterbang after the engine is turned off?
Automatic choke
Fuel enrichment
Pickup tubes
Fuel solenoids
Question 13
13.
Question 14
14.
What type of operation is this carburetor in based off of the choke and throttle?
idling
starting
full throttle/high speed
part throttle
Where is pressure the lowest?
top
middle
bottom
Which of the following is the most common type of fuel delivery method used to get fuel from the fuel tank to the EFI system?
Electric
Mechanical
Vacuum
Pulse
What is the purpose of fuel injectors?
To control the fuel pressure and return excess fuel to the tank
To atomize the fuel into a mist for better combustion
To distribute the air/fuel mixture to the cylinders
To remove particles found in the fuel to prevent damage
Which of the following are usually found in the form of a screen basket?
Temperature sensors
Pressure regulators
Fuel injectors
Pre-tank filters
ECU is the acronym for which of the following?
Engine control unit
External computing undertake
Engine calculation understanding
External compression unit
Which of the following sensors provides the ECU with a signal for determining engine load?
Crankshaft position sensor
Inlet air temperature (IAT) sensor
Oxygen sensor
Manifold absolute pressure (MAP) sensor
Which of the following sensors allows the ECU to increase or decrease the fuel mixture and spark timing to adjust for deceleration, acceleration and changes in load?
Throttle position (TPS) sensor
Oxygen sensor
Engine temperature (ET) sensor
Inlet air temperature (IAT) sensor
Where can the oxygen sensor be installed?
muffler
cylinder head
oil pan
coolant system
Which of the following only functions after warming up to the operating temperature?
Engine temperature (ET) sensor
Throttle position (TPS) sensor
Oxygen sensor
Manifold absolute pressure (MAP) sensor
Which of the following is the optimum air/fuel ratio for a gasoline engine?
14.5:1
15.4:2
14.7:1
13.7:1
A large increase in elevation can cause a carbureted engine to run ________ if not properly adjusted for the altitude.
in circles
lean
backward
rich
Match each component with its function.
Holds fuel for use by different metering circuits
Controls the level of fuel in the bowl
Delivers fuel to the throat of the carburetor
Where fuel enters the carburetor from the fuel tank
Maintains the air pressure at atmospheric levels
Allows fuel to enter the float bowl as it is consumed
Fuel supply inlet
Fuel bowl
Fuel bowl vent
Float assembly
Inlet needle
Pickup tube
EFI is the acronym for which of the following?
Engine Faulty Incoming
Engine Fuel Ignition
Electronic Fuel Injection
Electric Filter Injection
Put the steps of the “shaker test” in order.
Let the solution sit for three to five minutesAdd fuel to the top mark
Let the solution sit for three to five minutes
Shake vigorously
Add fuel to the top mark
Read the alcohol percentage level
How can fuel become oxidized?
Becoming too cold
Exceeding its shelf life
Becoming too hot
Being to lean
Altering the air/fuel ration due to an increase in alcohol is known as which of the following?
Phase separation
Degreasing
Corrosion
Enleanment
Ethanol is ____________ oxygen.
37.6%
39.2%
42.1%
43.4%
Select the appropriate choice.
Choke
Throttle
Left (6)
Right
What type of operation is this carburetor in based off of the choke and throttle?
