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53 Cards in this Set
- Front
- Back
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What is the most common type of valve? |
Globe valve. |
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A type of valve that incorporates a sliding gate to block fluid flow. |
sliding gate |
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What is the purpose of the packing gland?
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It seals the Gate valve so it doesnt leak |
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A valve named for their spherical body shape, and is the most common type of valve?
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Globe Valve
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Used when making a 90 degree turn
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Angle Valves
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Butterfly Valve
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Disk or wafer creates a seal. Can be used as a shut off valve or throttling only in a vapor or gas pressure control. Good for low pressures. Prone to obstruction and rust. |
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Plug Valves
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Back to ancient times, with Romans
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Ball valves
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any valve that checks flow by the seating of a ball valve - control consisting of a mechanical device for controlling the flow of a liquid.
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Specialty Valves
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include check valves (one way valves, relief valve, and pressure- vacuum relief valve)
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What kind of valve do you find on a discharge side of the pump?
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Check valve
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What is the least reliable valve?
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Check valve
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What does a relief Valve do?
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Allows cargo to go back to the suction side of the pump so you dont over pressurize the cargo pumping system.
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What is the purpose to the flame screen?
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Doesnt allow fire in, but allow gasses to escape
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What are some of the valve malfunctions? |
Broken or bent stem Sheared reach rod Improperly seated Worn seat Jammed open or closed Faulty valve indicator Leaking gland Improperly adjusted motor Foreign obstructions |
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PT How are pumps classified? |
Kinetic or Positive Displacement |
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PT What are the categories of Kinetic pumps? |
Centrifugal Vertical (ie Deepwell pump) Submerged |
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PT Define Cavitation |
formation of bubbles in a liquid or empty spaces in a pump. (noise, heat, bubbles, high rmp and fluctuations) |
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PT What should we look out for in a damaged pump? |
Seals (look for leaks) Bearings (listen for noise) Impeller (wear and tear) |
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PT What is another name for a turbine pump? |
A regenerative pump or peripherial pump |
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PT What is another name for a Deepwell pump? |
A vertical - turbine pump |
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PT What type of pump is a Deepwell pump? |
A centrifugal pump thus it requires prime. |
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PT What are advantages to the Framo pump system (they manufacture submerged pumps)? |
Unique stripping system anti-rotational break so load through pump no bottom piping |
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PT What kind of condition is in slides 30 and 31? |
30 Suction head condition 31 Suction lift condition |
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PT Booster Pumps? |
If the shore tank is at a high elevation or far distance, then you acquire the assistance of this pump. |
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PT When a booster pump comes online what happens to the pressure on your ship when you're discharging? |
It decreases |
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PT Booster pump aids with what type of system? |
cargo system |
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PT What are types of positive displacement pumps? |
Rotary Double acting Reciprocating pump |
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PT Can an Eductor pass the discharge rate in a positive displacement pump? |
Yes |
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CT What is the permissable exposure limit for Benzine? |
1 ppm (part per million) |
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CT What are the 3 broad categories or classification for tanker cargo? |
Petroleum liquids Chemical liquids Special liquids |
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CT Identify organic chemicals |
Acetone
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CT What are some examples of Aromatic Hydrocarbons? |
benzene, toluene, xylenes (Anything that ends in 'ene'. Petroleum products) |
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CT How can Crude Oil be described as? |
As heavy or light depending on specific gravity |
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CT How can we transport a very viscous fluid? |
By heating it up |
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CT What are the 3 refining processes and describe? |
Distillation - physical seperation through boiling Cracking - splitting fractions into lighter fractions Purification - process of removing impurities |
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CT What are the two types of international classification for petroleum? |
Volatile and non volatile |
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CT What are the two types of classification for petroleum according to the USCG? |
Flammable (less than or equal to 80 degrees) & non flammable (greater than 80 degrees). |
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CT What are the U.S.C.G. Classification of Combustible Liquids? |
A D |
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CT Describe a Class A combustible liquid |
Flash Point: 80 F or below |
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CT Describe a Class B combustible liquid |
Flash Point: 80 F or below |
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CT Describe a Class C combustible liquid |
Flash Point: 80 F or below |
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CT Describe a Class D combustible liquid |
Flash Point: Above 80 F but below 150 F
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CT Describe a Class E combustible liquid |
Flash Point: 150 F and above |
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CT What is the API standard temperature? |
60 degrees |
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CT What is a Hydrometer? |
An instrument used to measure density (can be used to measure dense cargo or water salinity through density) |
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CT What does a hygrometer do? |
Measures humidity |
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CT How many gallons in a barrel? |
42 |
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CT What is viscosity? |
A measure of internal friction of a liquid or its resistance to flow |
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CT Define pour point |
the lowest temperature at which the liquid will remain a fluid |
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CT Where can you get info regarding your cargo? |
MSDS Chemical Data Guide CFR's CHRIS manual Chemical Codes - IMO Pocket Guide to Chemical Hazards Tanker Saftey Guide Data Sheets from ICS |
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CT What can we do to secure the pump room? |
Keep it free of leaks Keep vents operational Frequent rounds for potential leaks Frequent rounds for flammable vapors and ignition |
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CT What would count as oxygen deficiency? |
Anything less than 19.5% oxygen |
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CT How much oxygen and nitrogen is in the atmosphere? |
21% oxygen, 78% nitrogen |
