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WorksheetsSEP 1123 EQUIPMENT OPERATIONS
Total questions: 40
Worksheet time: 30mins
What is the function of distillation column?
To remove moisture from the gas stream.
To separate two or more substances in liquid mixtures at different boiling point.
To transfer heat from one body to another body.
To separate two or three components mixture by gravitational force, differential density and fluid insolubility.
Following are the types of continuous distillation columns EXCEPT
Based on the nature of feed that they are processing (binary and multi-component column)
Based on where the extra feed exists when it is used to help with the separation (extractive and azeotropic)
Based on the column externals (boiler and condenser)
Based on the number of product stream that they have (Multi-product column)
What is the function of tray (plate) installed in the distillation column?
To allow the mixing between liquid and vapor.
To increase retention time of the liquid and vapor in the distillation column.
To maximize the internal space in the distillation column.
To efficiently contact the vapor and liquid in distillation column.
Shutdown of the distillation is normally performed before plant turnaround started. What are the general sequences of distillation shutdown?
I - Reduce the temperature of reboiler.
II - Block the top and bottom products flow lines.
III - Block the flow of feed.
III, II and I
I, II and III
III, I and II
II, I and III
The wide range of commercial packings and their variations in geometry introduce significant empiricism into the design of packed columns. What are the general optimization rules of fundamental mass-transfer and pressure-drop principles?
I - Maximizing theoretical stages per height of section or column.
II - Minimizing pressure drop per theoretical stage of separation.
III - Maximizing the operating range of the column that results in reasonable performance.
IV - Maximizing the number of tray used.
II, III and IV
I, III, and IV
I, II and IV
I, II and III
What are the criteria of selecting the solvent in absorption process?
I - Capacity or dissolving power for the required solute.
II - Insolubility factor between solvent and solute.
III - High selectivity or separation factor.
IV - Should have less vapor pressure.
I, II and III
I, II and IV
I, III and IV
II, III and IV
Following are the classification of absorption EXCEPT
Laminar
Discontinuous
Continuous
Turbulent
There are a few internal common devices in tray and packed columns. What is the function of mist extractor?
to physically support the packed bed and prevent the downward migration of packing pieces
to prevent fluidization of the packings and restrict packing movement
to remove liquid droplets entrained in the vapour stream before the stream leaves the top of the column
to collect liquid from between packed beds
Following are the factors that affect absorption efficiency EXCEPT
Solvent purity
Operating pressure
Operating flowrate
Operating temperature
What are the sequences of general normal shutdown of an absorption?
I - Reduced stripper temperature to atmospheric.
II - Closed rich feed gas to the absorber.
III - Reduced the column pressure to atmospheric.
IV - Stop the solvent pump.
II, III, I and IV
I, II, III and IV
III, II, I and IV
IV, I, II, and III
What is adsorption?
one or several solutes are absorbed from the gas phase into a liquid phase
a separation process in which certain components of a fluid phase are transferred to the surface of a solid adsorbent
process of heat transfer from one medium to another
separation process caused by gravitational force, fluid insolubility and differential density
What are the factors that affecting the efficiency of adsorption and regeneration?
I - operating pressure
II - operating temperature
III - always operate the system above dew point temperature
operating flowrate
I, II and III
I, II and IV
I, III and IV
II, III and IV
What are the sequences of regeneration process in adsorption system?
I - drying
II - cooling
III - desorbing
III, II and I
I, II and III
III, I and II
I, III and II
Following are the principles of adsorption and regeneration EXCEPT
Depressurizing
Heating
Cooling
purging
Following are the typical reactors used in the chemical hydrocarbon and oil refining sectors EXCEPT
batch stirred tank reactors
continuous feed plug flow reactors
continuous feed fluidized bed reactors
batch discontinuous reactors
Which is the CORRECT statement related to continuous feed fluidized bed reactors?
reactors where reactants are mixed, then passed through a fixed catalyst bed
reactors where the reactants and the catalyst are mixed to react in a fluidized bed
reactors where reactants mix, react and then flow through multiple compartments in the reactor
reactants (and possibly a catalyst) are added to the reactor vessel and mixed by an agitator for a predetermined reaction time period
Following are the typical problems that may occur in a reactor system EXCEPT
tube rupture
off specification products
a runaway reaction
very low reactor temperatures due to endothermic process
One of the reactor problem is runaway reaction. It can be caused by the following factors EXCEPT
loss of heating
loss of agitation
loss of reaction retarding chemicals.
excessive concentrations of catalyst
In what condition, the emergency shutdown will be initiated for a reactor?
event of fire
event of major spill
event of runaway reaction
power failure
loss of catalyst
Gas testing must be carried out before anyone enters the vessel to ensure the atmosphere is not toxic, explosive or oxygen deficient. This activity is performed during reactor maintenance shutdown. Is TRUE or FALSE?
TRUE
FALSE
Following are the mechanism of heat transfer EXCEPT
conduction
convection
heating
radiation
The diagram illustrated the heat transfer mechanism of..........................
convection
conduction
heating
radiation
What are the features need to be considered in designing heat exchanger?
I - Material of greater conductivity
II - Larger contact area
III - Longer duration of contact
IV - Type of fluid used to transfer heat
I, II and III
II, III and IV
I, II and IV
I, III and IV
Tubes’ materials of shell and tube heat exchanger type are usually made of steel, bronze, aluminum and copper. Is it TRUE or FALSE?
TRUE
FALSE
How many passes does the above heat exchanger has?
2
4
6
8
Furnaces referred to as fired process heaters, are basically enclosed structures that produce heat by the combustion of fuels. Is it TRUE or FALSE?
TRUE
FALSE
Following are the typical classification of furnace EXCEPT
Natural Draft
Forced Draft Furnaces
Balanced Draft Furnaces
Induced Draft Furnaces
What are the factors affecting heat transfer?
I - Flame temperature
II - Temperature difference between the outside of tubes and the fluid inside
III - Surface of tubes exposed to the flame or hot gas
IV - Pressure difference through the furnace tube wall
I, II and III
I, II and IV
I, III and IV
II, III and IV
Following are the items of the furnace operating conditions and monitoring EXCEPT
Draft
Fuel
Flue gas temperature
Process fluid pressure and flow
Hot spot is an overheated part of a furnace tube caused by insufficient process fluid flow or by flame impingement. Is it TRUE or FALSE?
TRUE
FALSE
What are the functions of the pump?
I - To move liquid from low elevation to a high elevation
II - To move liquid from a low pressure area to high pressure area
III - To compress the liquid in order to increase pressure difference
IV - To move liquid in a given amount of time
I, II and III
I, II and IV
I, III and IV
II, III and IV
What is the purpose of the pump is arranged as in the diagram?
to increase the discharge head
to increase the discharge pressure
to decrease the discharge temperature
to increase the discharge capacity
What are the type of reciprocating displacement pumps?
I - Piston type
II - Plunger type
III - Lobe type
IV - Sliding vane type
V - Diaphragm type
VI - Direct-acting type
I, II, III, IV, and V
I, II, V and VI
II, III, IV, V and VI
I, II, III, IV, V and VI
Multi-stage compressors are those in which compression from initial to final pressure is completed in two or more distinct steps or stages. Is it TRUE or FALSE?
TRUE
FALSE
The principal elements of a reciprocating gas compressor are cylinder, heads, pistons, inlet valves, discharge valves and impeller. Is it TRUE or FALSE?
TRUE
FALSE
The gas generator in gas turbine is composed of three major components. What are they?
I - Air Compressor
II - Combustion Chamber(s)
III - Gas Generator Turbine Wheels which drive the Air Compressor
IV - Fuel system
I, II and III
I, II and IV
I, III and IV
II, III and IV
To start the gas generator in gas turbine, it is necessary to rotate the compressor to produce an initial air flow, provide a flow of fuel to the burners and provide a means of supplying the air/fuel mixture. Is it TRUE or FALSE
TRUE
FALSE
A steam turbine is a device that converts the thermal energy of steam into mechanical energy by using it to turn the blades of a rotor. Is it TRUE or FALSE?
TRUE
FALSE
The impulse or reaction turbine is classified depending on the way in which steam is supplied and removed. What is the type of turbine in the given diagram?
Mixed Pressure Turbine
Extraction Turbine
Condensing Turbine
Non-condensing or Back Pressure Turbine
Excessive bearing clearance is one of the vibration problem due to loose parts. Remedy action to solve this problem is by adding shims as required to tighten bearing and replace worn parts as required. Is it TRUE or FALSE?
TRUE
FALSE
