190203a Diesel Fuel and Storage Tanks

Question 1

Diesel fuel is one of many products obtain during the refining of

Answer 1

Crude oil

Question 2

What is the cetane number for #1 winter grade diesel fuel

Answer 2

45-50

Question 3

What is the cetane number for #2 summer fuel

Answer 3

35-40

Question 4

What is the #1D winter fuel pour point?

Answer 4

-44C or -47.2F

Question 5

What is the #2D summer fuel pour point?

Answer 5

-23C or -9.4F

Question 6

Why must dual tanks be connected ?

Answer 6

So that fuel levels equalize during withdrawal.

Question 7

Cloud point is

Answer 7

The temperature which waxes (paraffin) becomes insoluble and starts to solidify.

Question 8

The flash point of #1D winter fuel is

Answer 8

Minimum is 43C or 110F

Question 9

The flash point of #2 summer fuel is

Answer 9

Minimum of 51.7C or 125F

Question 10

The standpipe should be how many inches from the fuel return, to allow for what ?

Answer 10

12” & so that return fuel can cool down before being recirculated.

Question 11

Why should storage tanks be mounted on an angle ?

Answer 11

To allow condensed water & sediment to collect at the low point and be drained.

Question 12

After handling fuel drums how long should they be left to sit to allow contaminates to settle ?

Answer 12

24 hours.

Question 13

When standing drums on end to pump fuel out, how far from the bottom should the standpipe be ?

Answer 13

1 - 2 inches.

Question 14

Is the BTU content of summer diesel fuel higher than that of winter diesel fuel??

Answer 14

Yes. The winter fuel has lower specific gravity. To help prevent gelling (freazing) of the diesel fuel. By Reduced paraffin waxes.

Question 15

When handling diesel fuel for prolonged periods of time. You may encounter what condition?

Answer 15

Dermatitis (inflammation).

Question 16

When exposed to diesel fuel vapours what condition can this cause

Answer 16

Oil Pneumonia. Be smart.

Question 17

Diesel fuel and other fuels such as jet fuel and kerosene are part of a large group of compounds called what?

Answer 17

Hydrocarbons

Question 18

Test oil should be used instead of diesel fuel for many reasons, such as

Answer 18

Low gum deposits, less corrosion, low odor, higher flash point and contoured viscosity
(And a controlled viscosity for accurate testing)

Question 19

It is recommended that test equipment for diesel injection components use what instead of diesel fuel as a fluid medium?

Answer 19

Test oil

Question 20

What is the biggest concern when storing and transferring diesel fuel?

Answer 20

Water and sediment

Question 21

Best way to prevent water and sediment?

Answer 21

Proper fuel handling practices

Question 22

Water in a fuel system can cause?

Answer 22

Rust and

Increases fuel viscosity (can result in damaged injection parts due to excessively high injection pressures)

Question 23

If you suspect fuel has microbial contamination, you can check it with?

Answer 23

A test kit

Question 24

Galvanized steel fuel tanks should not be used for diesel fuel storage because?

Answer 24

There is a chemical reaction between diesel fuel and the zinc used in the galvanizing process.

Question 25

Why is barrel centerline on an angle?

Answer 25

Because water and sediment collect at the lowest point

Question 26

Why must storage tanks be vented?

Answer 26

To allow expansion and contraction of the fuel and to allow atmospheric pressure to act on the fuel during withdrawal.

Question 27

How far should the outlet for the filler hose be positioned from the bottom of the tank?

Answer 27

7.6 to 10.1 cm (3 to 4 inches)

Question 28

Why should the filler hose be positioned 3- 4 inches off the bottom of a fuel storage tank?

Answer 28

To prevent drawing out water and sediment with the fuel

Question 29

How much power output loss will you experience from switching #2D summer fuel to winter fuel #1D ?

Answer 29

3-10 % loss in power output

Question 30

What does the crossover line do on dual fuel tanks ?

Answer 30

Allows fuel level to equalize in both tanks

Question 31

The term cetane rating refers to the ability of

Answer 31

Diesel fuel to ignite

Question 32

As compared to winter diesel fuel, the BTU content of summer diesel fuel is

Answer 32

higher

Question 33

What are the four basic categories for diesel fuel additives used in the refining process

Answer 33

Engine performance, fuel handling, fuel stability, contaminant control

Question 34

______________ can be added to a diesel fuel tank in small amounts to prevent the formation of ice crystals when temperatures drop below freezing

Answer 34

Isopropyl alcohol

Question 35

Fuel tanks should be vented to prevent

Answer 35

To prevent a vacuum from forming in the tank during withdrawal

Question 36

What phrase best describes the term flashpoint

Answer 36

The lowest temperature fuel will give off flammable vapors

Question 37

Microbial contamination of diesel fuel can be prevented by

Answer 37

Maintaining a clean, dry fuel supply

Question 38

2 rules to follow when adding alcohol to diesel fuel. (NOT methyl hydrate)

Answer 38

``` Use isopropyl (rubbing alcohol) Only use 0.5% concentration by volume. Example 455L of diesel will = 2.3L (0.5%) ```

Question 39

Diesel is a compound composed of what?

Answer 39

85% carbon and 15% hydrogen

Question 40

Diesel fuel is rated by Cetane number. Define "cetane number"?

Answer 40

Cetane number is a measure of the ignition quality of diesel fuel.

Question 41

During the chemical separation process to refine crude oil, what is "upgrading"?

Answer 41

Upgrading is the chemical processes used to improve the quality of the oil. (ie. hydro-treating)

Question 42

List 5 properties used to describe diesel fuel

Answer 42

Any of these 9: - ignition quality - energy content - volatility - viscosity - pour point - cloud point - flash point - sulphur content - water and sediment content

Question 43

Where are primary filters placed in the fuel circuit?

Answer 43

are placed between the fuel tank and the transfer pump inlet (protects the transfer pump)

Question 44

Where is the secondary filters placed in the fuel circuit?

Answer 44

placed between the outlet of the transfer pump and the inlet of the injection pump (protects the injection pump)

Question 45

What does air consist of?

Answer 45

79% nitrogen | 21% oxygen

Question 46

The rate of evaporation of fuel is called?

Answer 46

volatility

Question 47

What is Fractionating?

Answer 47

refining process using heat, boiling to split petroleum | separation

Question 48

What makes up diesel fuel?

Answer 48

85% carbon | 15% hydrogen

Question 49

What is octane?

Answer 49

octane-gas engine | ignites when it is higher, resistance to ignition

Question 50

Why should galvanized tanks be used to sot=re diesel fuel?

Answer 50

Coating can dissolve into the fuel