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Wet cargo > Ch 1-Properties of oil (c) > Flashcards

Ch 1-Properties of oil (c) Flashcards

1
Q

What gives oil its characterisitics?

A

The number of carbon atoms in a ‘chain’

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2
Q

What is the simplest oil?

A

Methane (CH4)

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3
Q

In what state do hydrocarbons with 1 to 5 carbon atoms exist as (normal atmospheric conditions)?

A

Gases

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4
Q

In what state do hydrocarbons with 6 to 19 carbon atoms exist as (normal atmospheric conditions)?

A

Liquid

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5
Q

In what state do hydrocarbons with more than 19 carbon atoms exist as (normal atmospheric conditions)?

A

Solids

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6
Q

What will affect the arrangements of oil?

A

The different arrangements (straight, branched, cyclical)

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7
Q

What are the hazards of petroleum? (3)

A
  • Flammability
  • Toxicity
  • Pollution
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8
Q

What is the rate of evaporation known as?

A

Volatility

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9
Q

What is volatility dependent upon?

A

Vapour pressure

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10
Q

What is the relationship between temperature and evaporation rate?

A

The higher the temperature, the greater the evaporation rate

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11
Q

When does saturation occur?

A

When the rate of evaporation equals the rate of condensation

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12
Q

What des SVP stand for?

A

Saturated Vapor Pressure

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13
Q

Where does boiling occur?

A

Within the liquid

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14
Q

Where does evaporation occur?

A

From the surface

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15
Q

What does RVP stand for?

A

Reid Vapour Pressure

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16
Q

What is RVP?

A

A simple test for comparing the vapor pressures of different substances

17
Q

What are the standard test conditions for RVP?

A

37.8 degrees C, 4:1 vapour liquid ratio

18
Q

What is gas evolution affected by? (5)

A
  • Vapour pressure
  • Temperature
  • Surface area of liquid
  • Vapour to liquid ratio
  • Turbulence
19
Q

What is the flash point?

A

The lowest temperature at which a substance gives off enough vapour to briefly ignite when exposed to an external source of ignition

20
Q

What does AIT stand for?

A

Auto Ignition Temperature

21
Q

What is AIT?

A

The lowest temperature at which a substances vapour will ignite without the presence of a source of ignition

22
Q

What are the three routes of toxicity in the body?

A
  • Swallowing
  • Skin absorption
  • Inhalation
23
Q

What does TLV stand for?

A

Threshold Limit Value

24
Q

What is TLV?

A

The time-weighted average concentration of a substance to which workers may be repeatedly exposed, for a normal 8 hour day or 40 hour work week, day after day, without adverse effect

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