A randomized 25 question test from a pool of 469 questions, good luck!
There are several ways to control the pressure in a distillation column. Which of the answers below is best described as a fast acting type of pressure control?
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
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 pressure reduction from a change in the angle of the gases path across the impeller?
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 steam drum level?
Boiler safety is an important part of reliable operation. Which of the strategies below would concern itself with maintaining proper furnace pressures?
There are many different parts and processes to a distillation column. Which of the processes below can be best described as the residual liquid exiting the tray at each stage?
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, while allowing for excess air for combustion??
In the reciprocating compressor system, there are numerous specialized components. Which of the components below would be best described as one that acts as a downstream backflow preventer?
Which of the answers below best describes a advantage that does not belong to a automatic feedback controlled system?
Which of the answers below best describes the "A" portion of the reaction curve?
Boiler feedwater treatment is a vital component for the smooth operation of an industrial boiler. Which of the conditioning methods below is comprised of mechanically removing impurities from the mud drum?
Which of the answers below best describes a decoupling control strategy?
In an industrial application, there are systems where two or more boilers supply a main header. Which of the terms below would best describe the controller that can be used in auto or manual to set firing rates?
Which of the answers below is best defined as affecting the controlled variable through changes in the process?
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?
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?
Which of the variables below is best defined as a controlled variable for a standard steam exchanger.
In an industrial application, there are systems where two or more boilers supply a main header. Which of the terms below would best describe the main steam header pressure controller?
There are multiple parts to a large industrial water tube boiler. Which of the answers below is best described as a fan that pulls and drives flue gases up the stack?
Direct and indirect ratio control have an inherent problem that requires the addition of feedback trim. Which of the answers below best describes that issue?
The techniques employed in process systems, that have the controlled value as close to the desired value are called control strategies. Which of the strategies below is designed to counter disturbances before they can affect the controlled variable?
There a some conventional distillation column control strategies. Which of the strategies below is best described as a direct setting of one of the output flows?
One of the more common applications for ratio control is fuel to air control schemes. Which of the control schemes below would use a firing demand controller whose signal would arrive at the air controller only?
Which of the responses below is best described as having one overshoot of the responses final value, and several oscillations that begin to settle over time??
Centrifugal compressors have some specialized problems while operating. Which of the terms below is best described as the flow of gas moving to the impeller from the discharge line due to differential pressure?