ISA CCST Level III | 78 Questions and Answers(A+ Solution guide)
72 views 1 purchase
Course
ISA CCST Level III
Institution
ISA CCST Level III
A Calibration procedure calls for checking a chemical cell oxygen analyzer daily. The range of the
analyzer is 0 to 1000 PPM, and the procedure states that ambient air be used for the check. The
chemical cell costs $350 and has a rated six months life. Cells are being replaced monthly.You Should:...
A Calibration procedure calls for checking a chemical cell oxygen analyzer daily. The range of the analyzer is 0 to 1000 PPM, and the procedure states that ambient air be used for the check. The chemical cell costs $350 and has a rated six months life. Cells are being replaced monthly.You Should: - ✔✔ A. Try to find a supplier of the sensor cells that is not as expensive. B. recommend a different type analyzer be used. C. recommend that a calibration system be installed using a 1000 PPM calibrating gas. D. continue the procedure. * In order to measure fluid flow with a Doppler type ultrasonic flow meter, the flowing stream must ____ to reflect the sonic pulses. - ✔✔ A. Contain particulate matter * B. Flow at a rate of 100 gallons per min, or more C. be conductive D. have a very low viscosity Transmitter steady state gain (output/input) should be ____ over it's entire range. - ✔✔ A. Variable B. constant * C. adjustable D. calibrated Most "smart" transmitter interface devices have a key pad with alpha -numeric keys, function keys and an LCD display. Display of the ____ is NOT available on the LCD display and cannot be changed. - ✔✔ A. transmitter piping and installation diagr am * B. transmitter engineering data C. transmitter upper and lower input range values D. transmitter upper and lower output range values A fluid is flowing through a 12 inch diameter pipe at a velocity of 4 ft/sec. When the piping reduces to 6 inch diame ter, and all other flowing paramters remain the same, the fluid velocity becomes ___ ft/sec. - ✔✔ A. 1 [Pipe Dia = √ (4 * flow rate)/( π * velocity)] B. 8 [velocity = (4 * flow rate)/(π *Pipe Dia2)] C. 16 [flow rate = 0.25 * π *Pipe Dia2 * velocity]* D. 24 ( Find flow rate (3.14)and solve for ft 12.56/0.785) A 50 microampers meter with a 200 milivolt raiting is being used to check voltage. What multiplier resistor value must be used to obtain a 10 volt full scale range (in ohms)? - ✔✔ A. 20k V = I * R B. 196K R = V / I C. 200K I = V / R (.00005)* D. 204K After controller settings are made using a process reaction curve method: - ✔✔ A. all settings must be documented for future use. B. the process should track set point with an exact precision. C. the process should be monitored for any necessary fine tuning. * D. the transmitter and control valve should be checked for calibration and accuracy. This electronic DP cell requires calibration to correct for the - ✔✔ A. zero error B. span error C. zer o, span and linearity errors * D. linearity error A self tuning algorithm is particularly valuable when a ____ must be controlled. - ✔✔ A. non - linear process * B. high temperature C. absolute pressure D. oscillating flow The velocity of a fluid can be d etermined by dividing the ___? - ✔✔ A. viscosity of the fluid by the area of the pipe B. density of the fluid C. the rate of flow of the fluid by the area of the pipe * D. volume of the fluid When tuning a cascade control loop, the slave controller needs _ __? - ✔✔ A. proportional response only * B. proportional plus integral response C. proportional, integral, and derivative D. proportional plus derivative A controller gain setting is greater than "1": You would expect its respons to be similar to a control ler with ____ proportional band. - ✔✔ A. a narrow * B. no C. direct D. wide Reset or integral control action is usually combined with proportional control action to eliminate ____. - ✔✔ A. cycles B. offset * C. overshoot D. slow response The conversion accuracy of a 10 -bit analog -to-digital converter is__________? - ✔✔ A. 0.98% of Measurement B. 0.098% of Measurement C. 0.098%FS * D. 0.98%FS Computer -aided calibration systems (CAC) execute a program in order to______? - ✔✔ A. Collect statis tical process data B. Reset controller set points
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller PatrickKaylian. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.49. You're not tied to anything after your purchase.
