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Process controls: FOURTH PERIOD

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

A system of control is needed in a centrifugal compressor to have consistent flow. Which of the constant speed compressor control systems below is best described as a restriction on the inlet flow, reducing the discharge flow?
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?
A system of control is needed in a reciprocating compressor to have consistent pressure. Which of the control systems below is best described as the simplest method?
All feedforward control strategies respond to a disturbance before it reaches the CV. Which of the strategies below does not verify that the CV has returned to the desired value
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?
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 adjust the compression rate of the compressor?
There are numerous undertakings in developing an SIS, this is called the safety life cycle. Which of the terms below relates best to a collection of devices that reduce a specific hazards risk?
When tuning with out decoupling, the _______ step is to tune the faster loops, the _______ step is to tune the most important loop. Choose the answer below that best fills in both blanks.
There are many different parts and processes to a distillation column. Which of the design feature below can be best described as the section that concentrates the heavier component in the liquid phase.
There are multiple parts to a large industrial water tube boiler. Which of the answers below is best described as an area where the temperature of the superheated steam is controlled with boiler feedwater?
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 a control that functions despite the surge controller not operating?
Certain typesof dynamic compressors need specialized components. Which of the components below would be required for a multistage centrifugal compressor?
There are multiple parts to a large industrial water tube boiler. Which of the answers below is best described as an exchanger that allows flue gases to heat the boiler feedwater?
The graph below is an example of a typical positive displacement compressor. Which of the numbered points would best be described as when the cylinder is full of gas at suction pressure?
Which of the answers below is best defined as a process that shows an exponential response to a step input?
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 having sodium carbonates substituted with sodium sulfates as a softening agent?
In the distillation process there are two defined variables. Which of the variables below can be best described as the quality of the content that is exiting the column?
In the distillation process heat is one of the most important variables to control. Which of the answers below would best describe the effects of an increase in heat production?
There a a wide variety of processes in any plant. Which of the processes use condensation and vapourization to separate the individual components of a liquid mixture?
One of the more common applications for ratio control is fuel to air control schemes. Which of the control schemes below would use a a signal arriving at both the air and fuel controllers from the firing demand controller?
There are several ways to control the pressure in a distillation column. Which of the answers below is best described as the pressure control where there is no manipulation of the coolant flow to the condenser?
In the reciprocating compressor system, there are numerous specialized components. Which of the components below would be best described as one that safeguards against over pressurization?
There are multiple parts to a large industrial water tube boiler. Which of the answers below is best described as the volume of steam needed for use?
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?
Which of the terms below is best described as the output by the controller to manipulate the FCE?