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Process controls: FOURTH PERIOD

A randomized 25 question test from a pool of 469 questions, good luck!

Compressors are split into general categories by how they produce downstream pressure. Which of the answers below would a double-acting piston pump be classified as?
Which of the control systems below is designed to uses the static gain of the transfer functions only?
Surge is the worst conditions that a centrifugal compressor can have, so some control strategies have been developed to mitigate this. Which of the strategies below can be described as the measurement of differential pressures in the compressor, head and inlet flow pressure determines if action is required?
Calculate the static gain of a process that has a step change of 15% in CO₁, creating a 20% change in PV₁ and a 12% change in PV₂ while CO₂ is held constant. A step change of 12% in CO₂ creates a -15% change in PV₁ and a 7% change in PV₂?
The feedforward compensation control is based on the transfer function of the process. Which of the answers below is one that this type of control has poor performance with a nonlinear process?
Each compressor have it's own pressure to flow profile at a defined speed. Which of the compressors below would have a predictable flow and inconsistent pressure?
Centrifugal compressors have some specialized problems while operating. Which of the terms below is best described as the operation at a high flow rate but low discharge rate?
Even a peak operating boiler must be protected from various issues that effect it's performance. Which of the terms below would be best be prevented by a chemical treatment coinciding with regular blowdowns, keeping the TDS near 0.03 ppm?
In relation to open loop static gain calculations the "B" in the picture below is best described by which term below?
A system of control is needed in a reciprocating compressor to have consistent pressure. Which of the control systems below is best described as one that changes the compressors capacity?
In process control, there are many control strategies to choose from. Which of the strategies would use the comparison of the PV to the desired SP?
There a some conventional distillation column control strategies. Which of the strategies below is best described as a one that does not control output flows from the column?
There are many factors in the proper working of a distillation column. Which of the answers below is one of those factors?
If an unusual condition appears, compressor control systems have instruments that will shut down the compressor safely. Which of the shutdown classes below is best described as armed at the successful completion of the start sequence, and stay armed until it's timer expires?
There are several common problems that can arise during a distillation columns operation. Which of the problems below can be described as when the vapour avoids the upper tray due to a lack of a seal in the downcomer from the tray above?
There a some conventional distillation column control strategies. Which of the strategies below is an example of an material balance strategy?
On a typical boiler control system, there are four main points of control. Which of the answers below would best be manipulated to control the supplied steam pressure?
In a saturation process that uses static decoupling, what is the value of D₁ and D₂ if K₁₁= 14%, K₁₂=-15%, K₂₁=23% and K₂₂=12%
In process control, there are many control strategies to choose from. Which of the strategies would adjust the manipulated variable by the measured disturbance?
There a some conventional distillation column control strategies. Which of the strategies below is best described as a one that indirectly controls the heat input to the column?
Which of the answers below is best described as the quantitative measurement of best controlled and manipulated variable pairings to limit loop interaction?
The relative amount of heat lost in the column is reflected in the reflux ratio. If the ratio were to increase, which of the answers below would describe the effect on the light key in the distillate?
The pulp mills require feed stock consistency. Which of the control strategies below would be best suited for the quality control of the paper pulp dilution?
There are many different parts and processes to a distillation column. Which of the design feature below can be best described as the process of condensed tops reintroduced to the column?
SAMA has various symbols for the elements or functions of a boiler. Which of the answers below correctly identifies "D"?