1
SGE chapter 5 Questions with Detailed Verified Answers
(100% Correct Answers) /Already Graded A+
a carburetor's primary function is to mix proper proportions of ___ and ___
to operate the engine
Ans: Fuel, air
gasoline must be ___ by the carburetor
Ans: vaporized
explain how a carburetor works
Ans: air enters the carburetor, misses with fuel in proper proportion, and the
mixture flows into the combustion chamber
normal air-fuel mixture ration:
Ans: 15 parts air to 1 part fuel
T & F; air-fuel mixture requirements vary, depending upon various operating
conditions
Ans: true
T& F; a Carburetor is a device that is operated by pressure differences
Ans: true
An absolute ____ is any area completely free of air or atmospheric pressure
Ans: Vacuum
As soon as the intake valve opens or the intake port is uncovered in a gas
engine, ___ ___ forces air through the carburetor and manifold to fill that
vacuum
Ans: atmospheric pressure
Approved By:
vPretest - Stuvia US
, 2
Venturi principle
Ans: a restriction in a passage which causes air to move faster (increases
velocity)
Name four factors that enhance the vaporization of fuel before it enters the
cylinder
Ans: Temperature
Pressure
TWO MORE?
in which carburetor must air velocity be highest
Ans: updraft
which carburetor can provide larger volumes of fuel for high speed and
power requirements
Ans: downdraft
what is the purpose of the carburetor float
Ans: maintain a constant level of fuel in the float bowl
as fuel is used from the float bowl, and float lowers and unseats a ___ valve
which lets fuel enter the bowl
Ans: needle
how is air pressure above the fuel in the float bowl and the air pressure
entering the carburetor equalized
Ans: by a vent in the float bowl, which assures a continuous, free flow of fuel
the carburetor ___ is a round disc mounted on a shaft located at the intake
end of the carburetor
Ans: choke
Approved By:
vPretest - Stuvia US
SGE chapter 5 Questions with Detailed Verified Answers
(100% Correct Answers) /Already Graded A+
a carburetor's primary function is to mix proper proportions of ___ and ___
to operate the engine
Ans: Fuel, air
gasoline must be ___ by the carburetor
Ans: vaporized
explain how a carburetor works
Ans: air enters the carburetor, misses with fuel in proper proportion, and the
mixture flows into the combustion chamber
normal air-fuel mixture ration:
Ans: 15 parts air to 1 part fuel
T & F; air-fuel mixture requirements vary, depending upon various operating
conditions
Ans: true
T& F; a Carburetor is a device that is operated by pressure differences
Ans: true
An absolute ____ is any area completely free of air or atmospheric pressure
Ans: Vacuum
As soon as the intake valve opens or the intake port is uncovered in a gas
engine, ___ ___ forces air through the carburetor and manifold to fill that
vacuum
Ans: atmospheric pressure
Approved By:
vPretest - Stuvia US
, 2
Venturi principle
Ans: a restriction in a passage which causes air to move faster (increases
velocity)
Name four factors that enhance the vaporization of fuel before it enters the
cylinder
Ans: Temperature
Pressure
TWO MORE?
in which carburetor must air velocity be highest
Ans: updraft
which carburetor can provide larger volumes of fuel for high speed and
power requirements
Ans: downdraft
what is the purpose of the carburetor float
Ans: maintain a constant level of fuel in the float bowl
as fuel is used from the float bowl, and float lowers and unseats a ___ valve
which lets fuel enter the bowl
Ans: needle
how is air pressure above the fuel in the float bowl and the air pressure
entering the carburetor equalized
Ans: by a vent in the float bowl, which assures a continuous, free flow of fuel
the carburetor ___ is a round disc mounted on a shaft located at the intake
end of the carburetor
Ans: choke
Approved By:
vPretest - Stuvia US
