Properties of oil (Wet cargo) Flashcards
What gives oil its characterisitics?
The number of carbon atoms in a ‘chain’
What is the simplest oil?
Methane (CH4)
In what state do hydrocarbons with 1 to 5 carbon atoms exist as (normal atmospheric conditions)?
Gases
In what state do hydrocarbons with 6 to 19 carbon atoms exist as (normal atmospheric conditions)?
Liquid
In what state do hydrocarbons with more than 19 carbon atoms exist as (normal atmospheric conditions)?
Solids
What will affect the arrangements of oil
The different arrangements (straight, branched, cyclical)
What are the hazards of petroleum? (3)
- Flammability
- Toxicity
- Pollution
What is the rate of evaporation known as?
Volatility
What is volatility dependent upon?
Vapour pressure
What is the relationship between temperature and evaporation rate?
The higher the temperature, the greater the evaporation rate
When does saturation occur?
When the rate of evaporation equals the rate of condensation
What des SVP stand for?
Saturated Vapor Pressure
Where does boiling occur?
Within the liquid
Where does evaporation occur?
From the surface
What does RVP stand for?
Reid Vapour Pressure
What is RVP?
A simple test for comparing the vapor pressures of different substances
What are the standard test conditions for RVP?
37.8 degrees C, 4:! vapour liquid ratio
What is gas evolution affected by? (5)
- Vapour pressure
- Temperature
- Surface area of liquid
- Vapour to liquid ratio
- Turbulence
What is the flash point?
The lowest temperature at which a substance gives off enough vapour to briefly ignite when exposed to an external source of ignition
What does AIT stand for?
Auto Ignition Temperature
What is AIT?
The lowest temperature at which a substances vapour will ignite without the presence of a source of ignition
What are the three routes of toxicity into the body?
- Swallowing
- Skin absorption
- Inhalation
What does TLV stand for?
Threshold Limit Value
What is TLV?
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
