Quiz 2 Flashcards
In the sweetening process the sour gas stream enters a contactor where it rises through a falling solvent (usually alkanolamines or amines) that has a very high affinity for acid gases. Heat is then used to drive the acid components from the amine solution in the:
a) Regenerator
b) Separator
c) Boiler
d) Heat Exchanger
d) Heat Exchanger
the gas stream can be dehydrated by contacting the gas with:
a) an absorbent
b) a desiccant
c) An amine solution
d) a rebolier
b) a desiccant
In a three-phase separator, the gas leaves the separator from the:
a) Top of the separator
b) Middle of the separator
c) Bottom of the separator
d) separator boot
a) Top of the separator
In a gas plant, H2S and CO2 are removed:
a) In the dehydration unit
b) In the separator
c) In the sweetening unit
d) During recompression
c) In the sweetening unit
When a gas stream is dehydrated by contacting the gas with a liquid:
a) Adsorption
b) Stabilization
c) Absorption
d) Separation
*a) Adsorption
The purpose of the inlet separator is to:
a) Remove H2S from the gas
b) Flash oil gases to flare
c) Remove liquids from the inlet gas
d) Separate gases out by cooling
c) Remove liquids from the inlet gas
Condensate may contain up to a maximum of 8% of butane and propan emust be less than 0.1% by volume. The maximum Reid Vapour Pressure allowed is:
a) 165 psi
b) 65 kPa
c) 6.5 psi
d) 0.65 kPa
b) 65 kPa
Removal of H2S and CO2 from the gas in a gas prrocessing plant is usually done:
a) during recompression
b) At the inlet separator
c) By cooling
d) By using amine
d) By using amine
what is a gas dehydration process that employees a granular dessicant known as:
a) An absorption process
b) An adsorption process
c) A separation process
d) a sweetening process
b) An adsorption process
products such as propane and butane must be very pure and contain no sulphur compounds. To remove all traces of sulphur compounds, the products pass through a:
a) A stabilizer
b) Molecular Sieve
c) Converter
d) Dessicant bed
b) Molecular Sieve
the devices that allow oil to be shipped (pumped) from the sales oil tank, while clean oil is being transferd into it are called:
a) emulsion transfer pumps
b) VRUs
c) Secondary separators
d) LACT Units
d) LACT Units
Water process system used to treat produced water must prevent the contact of the water with air because:
a) Air prevents the removal of suspended solids
b) The remaining oil droplets may evaporate if exposed to air
c) The air can promote the growth of bacteria
d) Pressure loss can occur if they are not
*c) The air can promote the growth of bacteria
All of the following are main components in a typical crude oil battery except:
a) Heat exchanger
b) Oil sales tank and sales oil pomping
c) Contact tower
d) Cold free water knockout
c) Contact tower
the equipment that is located at the inlet and is used to capture devices that are run from the satellites to the battery to clean out paraffins accumulated in the group production line is called:
a) Paraffin exchanger
b) Pig receiver
c) Inlet mole sieve
d) free water knockout
b) Pig receiver
In a typical crude oil battery the final oil clean -up that brings the oil to pipeline specification occurs in the:
a) Hot free water knockout
b) Heater treater
c) oil sales tank
d) Cold free water knockout
b) Heater treater
why it is important that produced water not come into contact with the air?
a) Residual hydrogen in the water is harmful to humans
b) combustion can result
c) contact can promote the growh of bacteria
d) Suspended solids may become airburne
*c) contact can promote the growh of bacteria
A hydrometer is used to measure:
a) Basic sediments and water
b) pour points of oil
c) The gravity of liquids
d) Reid vapour pressure
c) The gravity of liquids
An oil battery heater treater is the unit that:
a) Allows oil to be shipped from the sales oil tank
b) is where the production liquids and solution gas enter the battery
c) Is where the final clean-up brings the oil to pipeline especifications
d) Is a vessel where the major portion of the free water in the productio stream settles out
c) Is where the final clean-up brings the oil to pipeline especifications
An orifice plate is used in a __________ of low type meter
rate
Flow across an orifice plate generates a ______ pressure
differential
An orifice plate in which the hole is located exactly in the centre of a pipe is called a _______orifice plate
concentric
The upstream pressure is ______ than the downstream pressure on an orifice plate with flow through the plate
higher
When one edge of an orifice plate is belleved, the belleved edge is installed facing _______with respect to the flow
downstream
Calculate the permanent pressure loss for the following conditions Orifice diameter=54 mm Internal pipe diameter= 90 mm Upstream Pressure= 2000 Kpa Differential Pressure Loss= 50 Kpa
Permanent pressure loss (h1) is 31.7 KPa
In the deep cut process, the gas stream leaving the plant after basic processing is put through a large gas turbine. The energy taken from the gas stream by the turbine causes the gas temperature to drop to about:
-100 C
In a deep cut process, where the temperature of the gas stream is dropped by refrigeration or some others cooling process, which components is not condensed out of the gas stream as a liquid?
a) Methane
b) Ethane
c) Propane
d) Butane
a) Methane
If the gas stream contains natural gas condensates, it is recovered and processed in a:
a) Stabilizer
b) Molecular sieve
c) Converter
d) Desiccant bed
a) Stabilizer
Why are tanks used for propane and butane storage spherical in shape?
a) Because when the products are at ambient temperatures in the summer the pressure is far below atmospheric pressure
b) Because when the products are at maximum tolerance temperatures in the summer the pressure is far below atmospheric pressure
c) Because when the products are at ambient temperatures in the summer the pressure is far above atmospheric pressure
d) Because the impurities settle to the top better than in tube -shaped vessels
c) Because when the products are at ambient temperatures in the summer the pressure is far above atmospheric pressure
Carbon dioxide content of the sales gas must be less than:
a) 10% by Volume
b) 5% by Volume
c) 2% by Volume
d) 4% by Volume
c) 2% by Volume
Stabilization of natural gas condensate:
a) Involves the removal of the heavier components from the condensate
b) Allows the condensate to be stored at pressures below atmospheric pressure
c) Makes the condensate product safer and easier to store
d) Utilizes the principle that heavier hydrocarbons have the ability to absorb lighter components from a gas stream
c) Makes the condensate product safer and easier to store
One method of preventing air contact with produced water in the produced water tanks is to maintain a very low -pressure gas blanket with the tank
a) True
b) False
*b) False
The free water knock out:
a) Raises the temperature of the oil and reduces its viscosity
b) Is a vessel where the major portion of the free water in the production stream settles out
c) Performs the final clean -up that brings the oil to pipeline specification
d) Captures pigs that are run from the satellites to the battery to clean out paraffin accumulations
b) Is a vessel where the major portion of the free water in the production stream settles out
In a typical crude oil battery demulsifier is added to:
a) Increase the stability of the emulsion
b) Decrease the break out of water
c) Reduce the efficiency of the process
d) Enhance the break out of produced water
d) Enhance the break out of produced water
All of the following are main components of a basic crude oil battery except:
a) Treater
b) BS & W monitor
c) Water disposal Pump
d) Line heater
d) Line heater
Choose the false statement about an oil battery FWKO
a) A FWFO is simply a large three- phase separator
b) Provides sufficient retention time to allow free water to almost completely separate from oil
c) Captures pigs that are run from the satellites to the battery to clean out paraffin accumulations
d) Separates the free water almost completely from the oil
c) Captures pigs that are run from the satellites to the battery to clean out paraffin accumulations
In Canada, the standard acceptable amount of basic sediment and water that sales oil may contain is less than:
0.5%
An oil heater treater is the unit that battery
Is where the final clean-up brings the oil to pipeline specifications
The abbreviation ID represents
Inside Diameter
The term “Machine Steel” is represented by the abbreviation
a) MACH
b) MAST
c) MA
d) MS
d) MS
The abbreviation PL stands for:
a) Placement
b) Propane Line
c) Programmable Logic Controller
d) Plate
d) Plate
The development of mechanical flow drawings involves:
a) Mechanical engineers
b) Instrument engineers
c) Drafting technicians
d) Process engineers
e) All of the above
e) All of the above
A new process operator will use ________ drawing(s) to gain knowledge of the process
a) Isometric
b) Detailed piping
c) Mechanical and Process
d) Mechanical
d) Mechanical
You are presented with two mechanical flow diagrams of different components of a refinery. They both have the abbreviation “STL” on a section of pipe. The abbreviation means:
Both of the pipes are made of the same kind of material, steel
The abbreviation for Brass is:
a) BRZ
b) BAB
c) BC
d) BRS
d) BRS
The abbreviation for socket weld is:
a) SW
b) SWG
c) SWP
d) SCR
a) SW
For flow lines shown on a mechanical flow diagram:
a) The insulation requirements are not listed
b) Valve sizes and types are not indicated
c) They are complete with line identification
d) They should not show connections (threaded or flanged)
They are complete with line identification
Each stream in a material balance is divide into its:
a) Economic value
b) Components
c) Phases (state of matter)
d) Particular origin
b) Components
A material balance sheet:
a) does not include major equipment
b) Provides sufficient information to readily determine heat balances
c) Includes the specific gravity and molecular weight of vapour streams
d) States maximum and minimum temperatures, pressures and flows
c) Includes the specific gravity and molecular weight of vapour streams
A material balance sheet:
a) indicates maximum and minimum temperatures, pressures and flows
b) Does not include major equipment
c) Does not provide the specific gravity and molecular weight of liquid streams
d) Rarely provides sufficient information to readily determine heat balances
d) Rarely provides sufficient information to readily determine heat balances
A flow diagram
a) Shows line sizes
b) is drawn to scale
c) Indicates critical internal parts of vessels
d) Does not require equipment titles
d) Does not require equipment titles
In a gas sweetening process, the contactor may also be known as the:
a) Reactivator
b) Stripper
c) Still
d) Scrubber
d) Scrubber or absorber
In the operating cycle of a basic amine process, the acid gases react with the amine and form:
a) Water insoluble salts, which are filtered off and collected at the end of they cycle
b) Gaseous salts, which are vented to the atmosphere
c) Water soluble salts, which stay in the solution
d) Water soluble salts, which are vented to the atmosphere
c) Water soluble salts, which stay in the solution
In the sweetening process, the amine is stripped of its absorbed gases in the:
a) Regenerator
b) Contactor
c) Amine purifier
d) Reboiler
a) Regenerator
The legal requirements that residue gas must meet before it reaches the fuel market specify a maximum H2S content in the range of 57 pppm top 228 ppm and a total sulphur content no more than:
a) 6845 ppm
One drawback of the two-stage amine process is that:
Organic residue builds up in the amine solution.
In the operating cycle of a basic amine process, the acid gases react with the amine and form:
Water-soluble salts, which stay in the solution
In the sweetening process, the amine is stripped of its absorbed gases in the:
Regenerator
The toxic combustion by-product produced by burning of H2S is called:
Sulphur dioxide
A non-regenerative gas sweetening method uses:
Caustic soda or lime carbonate
