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63 Cards in this Set
- Front
- Back
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What is the nato code for mogas? |
F-46 |
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What is mogas composed of? |
A mixture of highly volatile liquid hydrocarbons designed for use in internal combustion |
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How are the characteristics of mogas determined |
By its knock value |
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What is the octane number? |
Is a numerical meausre of the antiknock properties of motor fuel, based on the percentage of volume of isooctane in standard reference fuel |
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What is the nato code for jp5 |
F-44 |
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Jp5 is based on what |
Kerosene based |
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Which is the only fuel approved for use in us navy ships |
Jp5 |
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Why is jp5 only fuel used aboard a ship |
Has a high Flashpoint |
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What happens to jp5 when mixed with other fuels |
Flashpoint lowers and becomes unsafe |
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Jp5 can be used to substitute what fuel |
Diesel fuel marine, nato code f-76 |
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What is the nato code of jp4 |
F40 |
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Who used jp4 |
Army, airforce and some navy shore stations |
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What is the nato code for jp8 |
F34 |
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What is the flashpoint for jp8 |
100 F |
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What is the flashpoint for jp5 |
140 F |
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What is the flashpoint for jp4 |
0 F |
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What is volatility |
The rate at which fuel changes into vapors |
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What is the vapor pressure of jp5 at normal room temperature |
0 psi |
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What is specific gravity |
Is the ratio of the weight of a given volume of fuel |
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All gravity determinations are correlated to what temperature |
60 F |
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What is the specific gravity of jp5 used for |
To determine the proper discharge ring size |
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What is viscosity |
The meausre of liquids resistance to flow |
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What is solvency |
The ability of the fuel to dissolve some materials |
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What is the freezing point of jp5 |
-51 F |
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What is flashpoint |
The lowest temperature at which the fuel vaporizes enough to form a combustible vapor |
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What are some of the safety precautions you must take when handling motor gasoline |
Avoid eye contact, do not inhale gasoline vapors, do not enter tanks that have contained gasoline until traces of gas vapors have been eliminated |
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What are some of the problems caused by contamination |
Engine failures, unnecessary repair work, delayed flight |
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How many microns are in the 1 inch, approx |
24k |
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What does ppm stand for |
Parts per million |
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What does MG/L stand for |
Milligrams per liter |
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What is the maximum ppl of water that jp5 can have to be acceptable for aircraft |
5 ppm |
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What is the maximum mg/l of sediment that jp5 can have to be acceptable for aircraft re fueling |
2 mg/l |
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What does the term clean mean |
The absence of any cloud, emulsion, visible sediment, free water |
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What does the term bright mean |
The fuel has a sparkling shiny appearance |
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What are the types of contamination |
Material and chemical |
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What are some examples of material contamination |
Water and sediment |
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What is the most common contaminant |
Water |
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How can water be present in fuel |
As free, entrained or dissolved water |
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Describe free water |
May be in the form of a cloud, emulsion, droplets, or in gross amounts in the bottom of tanks and containers |
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Describe entrained water |
Found in fuels in the form of very small droplets, fog, or mist and it may or may not be visible to the naked eye. When large quantities of entrained water are present, the fuel will have a hazy or milky appearance |
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Describe dissolve water |
It is dissolved and absorbed in the jp5 and is not visible |
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What is another name for particular matter |
Sediment |
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How does sediment appear |
As dust, powder, fibrous material, grains, flakes or stain |
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What are two most common sediments |
Course and fine |
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Describe course sediment |
It can be seen and easily settles out of the fuel or can be removed by adequate filtration |
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What is the size of course sediment |
10 microns or larger |
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Describe fine sediment |
Usually not visible to the naked eye proper filtration and centrifuging can remove 98% of the fine sediment in fuel |
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What is the size of fine sediment |
Smaller than 10 microns |
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What is microbiological growth |
Consist of living organisms that grow in the fuel/water interface |
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What does microbiological growth consist of |
Protozoa, fungus and bacteria |
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What is the major constituent |
Fungus and the cause of most problems associated with microbiological growth |
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What is fungus |
Is a vegetable life that holds rust in water in suspension and is an effective stabilizing agent for fuel water emulsion |
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what is an emulsion |
Is a liquid suspended in another liquid |
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What are the two types of emulsion |
Fuel in water and water in fuel |
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Which one is the most common type of of emulsion |
Water in fuel |
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How does water in fuel appear |
As a light to heavy cloud in the fuel |
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What is a surfacant |
Is a contraction of term surface- active agent |
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What is a surface active agent |
Is a substance that causes marked reduction in the inter facial tension of liquids |
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How does surfacant appear |
Dark red-brown or black water in filter /separator sump drains, refuelers sump drains or pipeline low - point drains |
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What is the most serious type of contamination |
Chemical |
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Describe commingling |
The inadvertent mixing of two or more different fuels |
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What usually causes commingling |
Carelessness or misunderstanding of the operation of a fuel system |
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What is a line sample |
Taken from a pipeline of a hose near the discharge point While the system is operating at normal flow rate |
