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Cadetship > Ship Operations - Wet Cargo (CHAPTER 1) > Flashcards

Ship Operations - Wet Cargo (CHAPTER 1) Flashcards

1
Q

What is the simplest hydrocarbon?

A

Methane

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2
Q

What is it called when hydrocarbon molecules join together?

A

Chains

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3
Q

How many carbon molecules in a gas?

A

Less than 5

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4
Q

How many carbon molecules in a liquid?

A

Between 6 and 20

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5
Q

How many carbon molecules in a solid?

A

More than 20

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6
Q

What happens when evaporation equals condensation?

A

Saturation conditions exist

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7
Q

What is Saturated Vapour Pressure (SVP)?

A

The pressure exerted when saturation occurs

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8
Q

What happens when SVP equals atmospheric pressure?

A

The liquid will boil

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9
Q

What is the difference between volatile substances and non-volatile substances?

A

Volatile substances evaporate rapidly, non-volatile substances evaporate slowly

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10
Q

What affects evaporation?

A

Temperature
Surface Area
Liquid to vapour ratio
Turbulence

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11
Q

What is True Vapour Pressure (TVP)?

A

Highest pressure possible

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12
Q

What is Reid Vapour Pressure (RVP)?

A

A useful test for comparing the volatility of different products

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13
Q

What is Flashpoint?

A

Lowest temperature at which a substance gives off enough vapour to briefly ignite when an external source of ignition is applied

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14
Q

What flashpoint is volatile?

A

Below 60 degrees C

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15
Q

What flashpoint is non-volatile?

A

Above 60 degrees C

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16
Q

What is Auto Ignition Temperature (AIT)?

A

Temperature at which a substance will ignite without the application of an external ignition source

17
Q

What is required for a fire to occur? And in what proportion?

A

Fuel (1-10%)
Oxygen (11-21%)
Heat (Sufficient amount to ignite a flammable mixture)

18
Q

What is Lower Flammable Limit (LFL)?

A

Lowest concentration of hydrocarbon gas in air to support combustion

19
Q

What is Upper Flammable Limit (UFL)?

A

Highest concentration of hydrocarbon gas in air to support combustion

20
Q

What is the Flammable Range?

A

The range between LFL and UFL

21
Q

What is the Flammable Zone?

A

The region within which combustion can take place

22
Q

What is the region above the UFL called?

A

Too Rich

23
Q

What is the region below the LFL called?

A

Too Lean

24
Q

What is the region below 11% Oxygen by volume called?

A

Inert

25
Q

What are the three main routes of entry for toxic substances into the body?

A

Ingestion
Inhalation
Through the skin

26
Q

What is the Threshold Limit Value (TLV)?

A

The concentration in air that may be breathed in without harmful effects for five consecutive eight hour work days

Cadetship (16 decks)

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