| A | B |
|---|
| The anti-afterfire solenoid found on some engines is designed to be used only on side jet carburetors. | False |
What is this a picture of?,  | After Fire Solenoid |
What is this a picture of?,  | Advancing style Magnetron ignition system |
What is this a picture of?,  | Carburetor emulsion tubes |
What is this a picture of?,  | Main jet & bowl nut |
What is this a picture of?,  | Ready start system at carburetor |
What is this a picture of?,  | Standard conventional style magnetron ignition system |
What is this a picture of?,  | Wet bulb primer |
| (T/F) Gasoline blended for use in winter is more volatile than summer blend fuel. | True |
| (T/F) Gasoline blended for use in summer is more volatile than winter blend fuel. | False |
| (T/F) The octane rating of a fuel is a good indicator of the power the fuel can deliver. | False |
| (T/F) A completely blocked high speed air bleed can commonly cause an engine to run rich under load. | True |
| (T/F) A lean air/fuel mixture can cause an engine to hunt & surge at top no-load speed. | True |
| (T/F) A blocked carburetor bowl vent can cause an engine to hunt & surge at top no-load speed. | True |
| (T/F) An incorrect spark plug heat range may likeley cause an engine to hunt & surge at top no-load speed. | False |
| (T/F) Vaporization occurs when a liquid is cooled suffeciently to change states from liquid to vapor. | False |
| (T/F) Vaporization occurs when a liquid is heated suffeciently to change states from liquid to vapor. | True |
| A toxic gas produced by incomplete combustion of gasoline. | carbon monoxide |
| This is the air - fuel ratio by weight at which the most complete and effecient combustion occurs? | stochiometric |
| Which carburetor component meters air into the idle circuit of the carburetor | pilot jet |
| (T/F) Adding 10% alcohol to fuel causes an engine to produce more power. | True |
| (T/F) The carburetor flange attaches to the engine at the intake port | True |
| (T/F) Air is "sucked" into the combustion chamber through the carburetor. | True |
| (T/F) Air is "pushed" into the combustion chamber through the carburetor. | False |
| (T/F) Increasing air velocity decreases air pressure. | True |
| (T/F) Increasing air velocity increases air pressure. | False |
| (T/F) Decreasing air velocity decreases air pressure. | False |
| (T/F) Areas of higher pressure tend to move to areas of lower pressure. | True |
| (T/F) Areas of lower pressure tend to move to areas of higher pressure. | False |
| When the throttle plate closes the air velocity in the carburetor ________. | decreases |
| What are the 4 major parts of the fuel system? | Fuel Supply, Fuel Lines, Fuel Filter, Carburetor |
| (T/F) A function of the carburetor is to mix fuel & air. | True |
| (T/F) Liquid gasoline is flamable. | False |
| What is the combustible part of gasoline? | Vapors |
| What is the most common fuel used in small engines? | Gasoline |
| Besides gasoline, what are 2 other types of fuel that may be used in small engines? | Diesel and LP Gas |
| In the term LP Gas what does LP stand for? | Liquified Propane |
| RON stands for | Research Octane Number |
| What does MON stand for? | Market Octane Number |
| (T/F) Using an alcohol blend in your fuel __________ combustion chamber temperature. | increases |
| (T/F) Carburetors are the only fuel system part that mixes fuel and air. | False |
| (T/F) The more stable the fuel charge during combustion the higher the AKI rating. | True |
| (T/F) The more stable the fuel charge during combustion the lower the AKI rating. | False |
| What does AKI stand for | Anti Knock Index |
| What does RVP stand for? | Reed Vapor Pressure |
| (T/F) Gasoline in the summer has a lower RVP than gasoline blended for the winter. | True |
| (T/F) Gasoline in the summer has a higher RVP than gasoline blended for the winter. | False |
| (T/F) Vapor lcok is the stoppage of fuel flow due to _________ in the fuel lines. | Air Bubbles |
| What scent is added to LP or natural gas to make leak detection easier? | Rotten Eggs |
| (T/F) The RON is an octane number that affects engine knowcking & pinging more at low to medium speeds. | True |
| (T/F) The MON is an octane number that affects engine knocking & pinging more at low to medium speeds. | False |
| (T/F) The MON is an octane number that affects engine knowcking & pinging more at higher speeds. | True |
| (T/L) TEL or Tetraethyl lead is used to increase the stability of fuel by causing the flame to remain intact as it crosses piston head. | True |
| What does TEL stand for | Tetraethyl Lead |
| Which would be the RVP of a winter gasoline blend? (8 PSI or 12PSI) | 12 PSI |
| Which would be the RVP of a summer gasoline blend? (8 PSI or 12PSI) | 8 PSI |
| What is the most common fuel oxygenator? | Alcohol |
| Does Alcohol increase or decrease the octane rating of gasoline? | Increase |
| An alcohol blend burns leaner or richer than a blend not containing alcohol? | leaner |
| Between a rich or lean fuel mixture which one produces higher combustion chamber temperatures? | leaner |
| (T/F) Cetane is a rating of the combustibility of diesel fuel. | True |
| (T/F) Octane is a rating of the combustibility of diesel fuel. | False |
| (T/F) Cetane is a rating of the combustibility of ethanol blended fuel. | False |
| TEL was blended with gasoline at what ratio? | 1300:1 |
| (T/F) Gasoline volatility affects starting ability. | True |
| What is the ideal air to fuel ratio by weight? | 14.7:1 |
| What is the stochiometric ratio for gasoline? | 14.7:1 |
| What is the ideal fuel air mixture for alcohol? | 9:1 |
| Do lean fuel mixtures run hotter or cooler? | hotter |
| (T/F) Ethanol fuel blends are corrosive. | True |
| (T/F) Alcohol fuel blends absorb water. | True |
| (T/F) Alcohol fuel blends helps to "dry out" fuel with water in it. | False |
| (T/F) The emulsion tubes increase the air velocity in the carburetor which creates a low pressure area. | False |
| (T/F) The venturi is the part of the carburetor that increases air velocity and a low pressure area | True |
| (T/F) The emulsion tubes deliver fuel from the bowl to the venturi where it is mixed with air. | True |
| (T/F) The main jet meters the amount of fuel that enters the emulsion tube. | True |
| What is the name of the part that meters the amount of fuel entering into the emulsion tube. | main jet |
What does the formula shown here represent?,  | Anti Knock Index |
| Was the addition of TEL (Tetraethyl lead) ever meant to serve as an engine lubricant? | No |
| When was the use of TEL discontinued? Which president order it to be removed from fuels? | 1990's ; President Bush |
| (T/F) Distilation determines the composition & volitilty of the components of a fuel sample. | True |
| (T/F) Blending of alcohol into gasoline enhances the octane rating and generally improves engine performance. | True |
| (T/F) MTBE is a non alcohol oxygenated fuel additive. | True |
| Will diesel fuel with a higher cetane rating be easier or harder to ignite? | easier |
| This part of the carburetor controls engine speed by restricting air flow into the engine. | Throttle plate |
| A bowl bolt with a machined fuel passage in it also serves as what? | main jet |
| This carburetor part blocks air flow before the venturi to make the mixture richer and easier to start. | Choke plate |
| This is often used in place of the choke plate to aid starting the engine by pushing fuel into the carburetor. | Primer bulb. |
| This part pushes fuel into the carburetor to aid in starting, | Primer Bulb |
| (T/F) Gasoline is a hydrocarbon fuel. | True |
| Is TEL still used in gasoline? | No. |
| What form of gasoline burns? | Vapor |
| What does RVP stand for? | Reed Vapor Pressure |
| Which blend has a higher RVP rating - Winter or Summer | Winter |
| Which season blend has a lower RVP rating | Summer |
| (T/F) Cold air is more dense and contains more oxygen per unit of air. | True |
| (T/F) Hot air is more dense and contains more oxygen per cubic foot of air. | False |
| (T/F) Air at higher altitudes is less dense and contains less oxygen by volume. | True |
| (T/F) Air at lower altitudes (sea level) is less dense and contains less oxygen by volume than air at higher elevations. | False |
| (T/F) Diesel fuel is a thicker, higher density fuel. | True |
This represents what in a curburetor,  | Idle circuit |
