http://www.isa.org/ InTech provides the most thought-provoking and authoritative coverage of automation technologies, applications, and strategies to enhance automation professionals’ on-the-job success. en-us Sat, 06 Apr 2013 15:47:40 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=92907 When looking at the raw input value of a single channel on an analog input card in the PLC, Karen sees that the raw input is expressed in “counts” and is an integer value that varies between 0 and 8092. She learned from the PLC manual that 0 counts occur when the input signal is 0 mA, and 8192 counts is obtained for an input signal of 20mA. If a 4–20mA pressure transmitter is connected to this analog input channel, and if the pressure sensor has a range of 0–100psig, approximately how many counts should Karen see for a sensed pressure of 25psig? Fri, 05 Apr 2013 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=92907 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=92906 A specification for a new facility indicates that the new system “must be capable of analyzing the multiple sources of data required to run the entire facility, as well as have the capability to provide collaboration between the visualization, alarm management, scheduling, reporting, and analysis functions.” The type of system that would best meet these requirements is: Fri, 05 Apr 2013 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=92906 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=92301 Thu, 07 Feb 2013 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=92301 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=93115 How can a transmitter's current output signal be converted to a voltage-input signal, as required by an electronic controller? Tue, 04 Dec 2012 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=93115 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=93114 The objective of forward decoupling Tue, 04 Dec 2012 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=93114 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=90799 Which of the following flow measurement devices does not require square root extraction Tue, 02 Oct 2012 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=90799 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=90798 A loop diagram typically includes all of the information indicated below, except for Tue, 02 Oct 2012 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=90798 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=90154 A properly designed control panel is fed by one 120VAC circuit. Mon, 06 Aug 2012 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=90154 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=90153 According to ISA-88.00.01-2010 (Part 1), which statement is true? Mon, 06 Aug 2012 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=90153 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=89353 When bundling and running cables in conduit and duct, the listed conductors are normally separated in different duct or conduit runs based on signal type. Tue, 03 Apr 2012 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=89353 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=89177 Which choice is NOT a major advantage of using cascade control? Tue, 03 Apr 2012 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=89177 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=88272 Which of the following temperature measuring elements/devices measures temperature as the result of an electromotive force being generated that is proportional to a temperature difference (Seebeck effect) between two dissimilar, joined metals? Tue, 31 Jan 2012 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=88272 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=88273 When a controller that possesses integral action receives an error signal for significant periods of time, the integral term of the controller will increase at a rate governed by the ... Tue, 31 Jan 2012 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=88273 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=87847 Flowmeters Mon, 05 Dec 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=87847 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=87846 Building Automation System Mon, 05 Dec 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=87846 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=87293 Which of the following network security technologies does not use encryption? Tue, 04 Oct 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=87293 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=87294 A fluid is flowing through a 10-inch diameter pipe at a velocity of 6 feet/sec. Tue, 04 Oct 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=87294 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=86967 In a PLC program, the continuous sequence of steps or "operating cycle" performed by a PLC processor is known as ... Wed, 03 Aug 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=86967 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=86966 A globe valve has a pressure recovery factor of 0.83 ... Wed, 03 Aug 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=86966 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=86256 In the ISA-84 standard, the concept of Multiple Independent Protection Layers refers to what? Thu, 02 Jun 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=86256 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=86259 Proper grounding of electrical devices is important for all of the following reasons, except for? Thu, 02 Jun 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=86259 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85580 Which of the following is an example of "Adaptive Control?" Wed, 06 Apr 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85580 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85581 In the maintenance of control systems, a maintenance cycle is comprised of four key activities ... Wed, 06 Apr 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85581 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85418 In a level control system using a capacitance probe as the sensor, if the process liquid medium changes, then ... Fri, 25 Mar 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85418 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85417 The liquid flow control loop above is installed at a plant where it is suspected that the amount of recycle flow is somewhat more than what is being displayed by FT-1, a digital flow transmitter. Fri, 25 Mar 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85417 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85108 What is the term used for phenomenon in liquid flow where falling static pressure causes the formation of vapor bubbles that subsequently collapse back into the all-liquid state as the fluid static pressure is recovered? Tue, 22 Feb 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85108 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85109 All of the following are disadvantages of RTDs as compared to thermocouples, except ... Tue, 22 Feb 2011 00:00:00 -0500 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85109 http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=85111 Which H1 Level Fieldbus topology (shown here) reflects a "Tree Topology" Mon