Instrumentation and Control Technician (INT)

Second Period Package (43 Modules) Comments

Date: 5/31/2019 11:16:49 PM
Module: 310201a
Version: 2
Page: 27
Comment: Self Test #9: A aluminum "tray" would be subject to area expansion rather than linear.
Status: Approved

Date: 12/18/2019 7:03:16 AM
Module: 310201a
Version:
Page: 6
Comment: Pgs. 6-7: While explaining Charles’ and Boyle’s Law the Ideal Gas Law, from which these are derived, should be shown. That is the only version of the gas laws that appear on the Instrumentation Formula Sheet. A gas law calculation example and self-test question should be added.
Status: Approved

Date: 12/18/2019 7:03:28 AM
Module: 310201a
Version:
Page: 16
Comment: The formula for area expansion should be included. Coefficient = 2a
Status: Approved

Date: 5/31/2019 11:16:48 PM
Module: 310201c
Version: 2
Page: 13
Comment: Figure 16 shows the reference junction connection points being at 0°C when Tr is actually at 20°C.
Status: Approved

Date: 12/18/2019 7:03:49 AM
Module: 310201d
Version:
Page: 35
Comment: Question #9: Instead of just mentioning to “look at Figure 28” it would be helpful to point out that the RTD tables are at the back of the ILM.
Status: Approved

Date: 12/18/2019 7:03:59 AM
Module: 310201f
Version:
Page: 7
Comment: Second paragraph: “volume or volume flow rate” should be replaced with “mass flow rate”. Then the paragraph will correctly state: “Because stating a mass flow rate at standard conditions defines the amount of a substance, it is commonly used for custody transfer…”
Status: Approved

Date: 5/31/2019 11:16:48 PM
Module: 310201h
Version: 2
Page: 44
Comment: Pgs.44, 47, & 55 #27: Using FT to represent a pressure transmitter that is NOT outputting a flow signal is probably not best practice or at least confusing for the students. The signal becomes flow after square root extraction. I believe it should be labeled "PT".
Status: Approved

Date: 12/18/2019 7:04:09 AM
Module: 310201h
Version:
Page: 8
Comment: Both steps in this example should read as follows: “1. Convert the static pressure to kPaa…” “2. Convert the second static pressure to kPaa….” The math is correct in the example (gauge pressure and atmospheric pressure are added together), it’s just the explanation that’s incorrect (says kPa instead of kPaa).
Status: Approved

Date: 12/18/2019 7:04:18 AM
Module: 310201h
Version:
Page: 17
Comment: Unlike the old note-pack this ILM does not discus other primary differential pressure elements (flow nozzle, venture tube, pitot tube). I believe Objective 5 would be a good place to at least mention these elements and compare them with with orifice plates especially since (as far as I can recall) we included a question on the Period example that requires a knowledge of pitot tubes.
Status: Approved

Date: 12/18/2019 7:04:29 AM
Module: 310201h
Version:
Page: 57
Comment: Self-Test #23: The answer talks about steam flow and the blanks are filled in with answers that are correct when it comes to steam flow but when you refer to the question as it appears in the Self-Test on page 54 the question is referring to “gas flow” not “steam flow”.
Status: Approved

Date: 12/18/2019 7:04:48 AM
Module: 310201h
Version:
Page: 4
Comment: The continuity equation for gas should be included A1V1p1 = A2V2p2
Status: Approved

Date: 12/18/2019 7:04:39 AM
Module: 310201j
Version:
Page: 36
Comment: (continued) The correction: Instead this formula for total buoyant force of a displacer in an interface should be something like: Fb = (RD1 x 9.81 x V% displaced) + (RD2 x 9.81 x V% displaced).
Status: Approved

Date: 12/18/2019 7:04:58 AM
Module: 310201j
Version:
Page: 36
Comment: The formula given at the top of page 36 [Fb = (RD1 – RD2) x 9.81 x V] is stated as “the method to calculate the buoyant force in a liquid-liquid interface. I do not believe this is correct. This formula would be used if you were finding the change in buoyant force (going from 100% in RD1 to 100% in RD2).
Status: Approved

Date: 12/18/2019 7:05:07 AM
Module: 310201j
Version:
Page: 46
Comment: Self-Test #4. Need to state which type of flat transparent gauge glass as “elongated” for the answer to be correct.
Status: Approved

Date: 5/31/2019 11:16:48 PM
Module: 310201k
Version: 2
Page: 44
Comment: Self Test #13: The span is -4.365 - (-67.228) = +62.863
Status: Approved

Date: 12/18/2019 7:05:19 AM
Module: 310201k
Version:
Page: 8
Comment: After stating the simplified metric formula the variables are defined. It should read “h is the depth or height of the liquid in meters”. Currently the ILM says “g”.
Status: Approved

Date: 12/19/2019 7:49:47 AM
Module: 310202a
Version:
Page: 21
Comment: The description used for the control block diagrams in Figure 11 & 12 is confusing. Stating that the “PV signal is positive and the SP signal is negative”(Figure 11) and the “PV signal is negative and the SP is positive”(Figure 12) is not correct as those signals do not inherit those signs until they reach the summing junction. Instead I would like the descriptions to read as follows: Figure 11 illustrates a direct acting controller. At the summing junction the setpoint (SP) signal is subtracted from the PV signal. This calculation (PV-SP) means that an increase in PV causes an increase in error making the controller direct acting. Figure 12 illustrates a reverse acting controller. At the summing junction the PV signal is subtracted from the setpoint(SP) signal. This calculation (SP-PV) means that an increase in PV causes a decrease in error making the controller reverse acting.
Status: Approved

Date: 12/19/2019 7:49:55 AM
Module: 310202b
Version:
Page: 17
Comment: In the Differential Gap example on page 17 the Proportional Band (PB) is calculated without first stating what the formula for calculating it is. The equation already has the numbers entered in it. It would create less confusion for the students if first it was written as PB = (Diff Gap/Span) x 100%.
Status: Approved

Date: 12/19/2019 7:50:03 AM
Module: 310202cA
Version:
Page: 30
Comment: Pg. 30: Reset is stated to be equal to “Proportional x Ki” but really the formula should be “Reset = Proportional x Ki x T. The effect of time is implied on this page when it shows Reset @ T1, T2, & T3 but it would be better to show how the time variable is used before hand and calculate it that way for the rest of the examples.
Status: Approved

Date: 12/19/2019 7:50:12 AM
Module: 310202cA
Version:
Page: 35
Comment: The controller Reset setting (integral gain) should be stated as Ti (min/rpt) since the solution mentions having to convert into Ki and solves to find the Ki to be 0.5 rpt/min). (Page 29 has same problem)
Status: Approved

Date: 12/19/2019 7:50:20 AM
Module: 310202cA
Version:
Page: 44
Comment: Self-Test #9: Question #9 asks for the open loop response at two and four minutes but the answers all say one and three minutes.
Status: Approved

Date: 12/19/2019 7:50:34 AM
Module: 310202cA
Version:
Page: 37
Comment: Move Objective 7 to be completed before Objective 6. Thus you will explain the “purpose and applications of a PI controller” BEFORE “preforming output calculations for a PI controller.”
Status: Approved

Date: 5/31/2019 11:16:49 PM
Module: 310202cB
Version: 2
Page: 14
Comment: Pg. 14: The error signal is reverse acting (e=SP-PV) ILM incorrectly identifies this as "direct actiong". Happens on the next page as well: Pg. 15: Since the controller is reverse acting..
Status: Approved

Date: 5/31/2019 11:16:49 PM
Module: 310202cB
Version: 2
Page: 14
Comment: Pg. 14: The error signal is reverse acting (e=SP-PV) ILM incorrectly identifies this as "direct actiong". Happens on the next page as well: Pg. 15: Since the controller is reverse acting..
Status: Approved

Date: 5/31/2019 11:16:49 PM
Module: 310202d
Version: 2
Page: 44
Comment: Pgs. 44 - 45 Self-Test 20, 21, 23. These three questions ask us to "give recommendations for which PID controller modes should be used". Each of the questions have one answer that is "no derivative". I feel it is bad practice to have a question asking what you should use when the answer is something you shouldn't use.
Status: Approved

Date: 12/19/2019 7:50:43 AM
Module: 310202d
Version:
Page: 38
Comment: Self-Test #1b: I don’t believe it is good practice to ask “what kind of disturbance?” and have an answer be “no disturbance”.
Status: Approved

Date: 12/19/2019 7:51:12 AM
Module: 310202d
Version:
Page: 43
Comment: Self-Test #18. The answer for number 18 is found on page 30 under “Fine Tuning” where it says “fine tune the controller by adjusting only the proportional gain”. But nowhere in that paragraph does it say we are fine tuning for a “critically damped response” like the question asks.
Status: Approved

Date: 12/17/2019 6:40:07 AM
Module: 310203aA
Version:
Page: 43
Comment: Self Test #12 is EXACTLY the same as Example 4 on page 27. Perhaps change the numbers?
Status: Approved

Date: 12/17/2019 6:40:20 AM
Module: 310203aA
Version:
Page: 47
Comment: Answer for #15 of Self Test. The current for the resistors in Table 5 is off by one decimal place for all of the resistors. Example: R5 should be 0.050 amps NOT 0.5 amps.
Status: Approved

Date: 12/17/2019 6:40:30 AM
Module: 310203aB
Version:
Page: 32
Comment: Third sentence in the 2nd paragraph should read. "AN atom normally has the same number of..."
Status: Approved

Date: 12/17/2019 6:40:41 AM
Module: 310203b
Version:
Page: 14
Comment: Objective 3: “Define the operation and application of various UPSs.” This section (Pgs. 15 – 42) covers both linear power supplies and UPSs. I believe the problem with this section isn’t the content but instead the Objective. The module needs to cover the components of a linear power supply (rectifier, regulators, and filters) but there is no objective that it fits in. Thus I believe it is the objective that needs to be altered. New Objective 3: “Define the operation and applications of linear power supplies and various UPSs.”
Status: Approved

Date: 12/17/2019 6:40:50 AM
Module: 310203b
Version:
Page: 17
Comment: In the example the transformer in Figure 18 is said to have a 2:1 ratio and a 120 V supply. If that is the case the full secondary (ignoring the center-tap) would be 60 V. Then VAD should equal 30 V (the ILM says 60 V?). Thus Vp = 42.43 V and VDC = 27 VDC.
Status: Approved

Date: 12/17/2019 6:41:38 AM
Module: 310203b
Version:
Page: 26
Comment: Peak Inverse Voltage for Filtered Rectifiers. The paragraph states: “For all filtered full-wave applications, the diode PIV is equal to the full peak transformer voltage. The exception to this rules is the full wave bridge, which is only half of the full peak transformer voltage.” My research has shown these statements to be incorrect (though I recommend someone with more knowledge then me look into it). From what I have read, a full wave bridge rectifier requires diodes with a PIV equal to the full secondary transformer peak voltage. A full wave center-tapped rectifier requires PIVs equal to 2 times the full secondary peak.
Status: Approved

Date: 12/17/2019 6:41:49 AM
Module: 310203b
Version:
Page: 39
Comment: The different types of switching covered on pages 39 – 42 seems excessive when the Objective is to “define the operation and applications of various UPSs.”
Status: Approved

Date: 12/17/2019 6:41:01 AM
Module: 310203c
Version: 1.1
Page: 43
Comment: Self-test answer # 3a should read "ease of setup" not "easy of setup" Self-test answer # 5 should read Static electricity is the build up of "electric" charge, not "electronic" charge
Status: Approved

Date: 12/17/2019 6:42:02 AM
Module: 310203c
Version:
Page: 36
Comment: Pgs. 36 – 39 These pages should be removed. The information covered is not required to fulfill Objective 4: “Solve BASIC arithmetic operations on decimal, binary, BCD, and hexadecimal number systems.”
Status: Approved

Date: 12/17/2019 6:41:11 AM
Module: 310203d
Version: 1.1
Page: 19
Comment: Line 3 at the top of the page should read the alarm condition must be cleared and the gas latch "reset" not "rest"
Status: Approved

Date: 12/17/2019 6:43:21 AM
Module: 310203d
Version:
Page: 8
Comment: NOT operation. The relay diagram is not a good example of the operation of a NOT gate. In the diagram when the Button (HS-101) sends a 0 (is open) the Pump (P-100) is off (0). Proper NOT operation would have a zero input causing a one output and vice versa.
Status: Approved

Date: 12/17/2019 6:44:11 AM
Module: 310203d
Version:
Page:
Comment: Pgs. 16 – 19: Latches. The latches sections is excessive for this objective which is supposed to just be covering the truth tables of basic logic gates. I feel that this would be more relevant if included in the Microprocessors and Memory ILM.
Status: Approved

Date: 12/17/2019 6:44:25 AM
Module: 310203d
Version:
Page: 24
Comment: Self-Test #7b: Answer is missing the NOT line over the BD NOR gate.
Status: Approved

Date: 12/18/2019 7:03:07 AM
Module: 310203e
Version:
Page: 20
Comment: Pgs. 20 – 21 Self-Test: Why do questions rarely have enough room given to write answers in the Self-Test? #2 has giant lines to write one digit on but #8 doesn’t have enough space to write “asynchronous”. It happens too often in all the modules. I could make a post like this for each one but really someone should go through all the Self-Tests and make sure there is enough room to write the answers to the questions.
Status: Approved

Date: 12/17/2019 6:41:26 AM
Module: 310203fA
Version: 1.1
Page: 3
Comment: Figure #2 the negative side of Light PL1 should be connected back to the negative terminal
Status: Approved

Date: 12/17/2019 6:42:13 AM
Module: 310203fA
Version: 1.1
Page: 11
Comment: Figure #17 Considering 3 phase motors are typically powered by a minimum of 480 volts, this figure should show a step down transformer connected to the control wiring, used to reduce the control wiring circuit voltage down to 120 V
Status: Approved

Date: 12/17/2019 6:42:58 AM
Module: 310203fA
Version: 1.1
Page: 36
Comment: Figure # 49 on page 36. the wire from the negative side of the 24 Vdc power supply should be connected to the C terminal of the Discrete output card, not terminal #7
Status: Approved

Date: 12/18/2019 7:02:29 AM
Module: 310203fA
Version:
Page: 10
Comment: Objective 1: “Describe the symbols and conventions used in relay logic.” The relay logic interpretation and wiring schematics on Pgs. 10 – 16 is excessive and not required to satisfy the objective. It should be reduced/removed.
Status: Approved

Date: 12/18/2019 7:02:39 AM
Module: 310203fA
Version:
Page: 35
Comment: Pgs. 35 – 38 This module spends several pages explaining multiples ways in which PLC cards change input loop power into low voltage signals used by the CPU (voltage isolation). TRIAC Switching, Relay Switching, and Transistor Switching are each covered in detail. Without explanation or reasoning as to why I, as an instrument technician, would choose one method over another when selecting a PLC card I cannot see any reason as to why my students should spend their time studying these configurations. They are not going to be opening up a card to change a TRIAC. A Relay Switching system is not going to cause the PLC to operate any differently than if the card uses Transistor Switching.
Status: Approved

Date: 12/17/2019 6:43:10 AM
Module: 310203fB
Version: 1.1
Page: 3
Comment: Figure # 4 Page 3. should read "output" image table not "input" image table
Status: Approved

Date: 12/17/2019 6:43:32 AM
Module: 310203fB
Version: 1.1
Page: 32
Comment: Figure 46, page 32. the symbol shown is an OR symbol not a NOR symbol.
Status: Approved

Date: 12/17/2019 6:43:45 AM
Module: 310203fB
Version: 1.1
Page: 48
Comment: Figure # 69 page 48. The module type should read "DO Module" not "DI Module"
Status: Approved

Date: 12/17/2019 6:43:56 AM
Module: 310203fB
Version: 1.1
Page: 52
Comment: Figure # 72 page 52. The ISA symbol indicating LSH input to the DI card is not correct, the symbol should be an ISA symbol of a NC level switch.
Status: Approved

Date: 12/18/2019 7:02:48 AM
Module: 310203gA
Version:
Page: 2
Comment: Pg. 2: The line “The software is the rules that specify how communication takes place.” would be better stated as “The software ‘structures’ the data to be sent in accord with the protocol.”
Status: Approved

Date: 12/18/2019 7:02:58 AM
Module: 310203gA
Version:
Page: 47
Comment: Self-Test #25: The sentence is incomplete and does not match the question it is the answer to. Should finish with “…take turns talking to the MASTER device.
Status: Approved

Date: 5/31/2019 11:16:49 PM
Module: 310204a
Version: 1.1000000000000001
Page: 34
Comment: Unclear what is meant when it says "Interconnection settings" will be shown on a P&ID?
Status: Approved

Date: 12/18/2019 7:05:29 AM
Module: 310204a
Version:
Page: 3
Comment: Pg. 3: The symbols used in the chart (Figure 1) to represent Alternate Choice or Safety Instrumented Systems are incorrect. The diamond symbol is usually used to represent a PLC. If you refer to the same chart (Table 7 on Pg. 15) in ILM 310202a Introduction to Automatic Control you will see an octagon used instead of a diamond. These charts should match.
Status: Approved

Date: 12/18/2019 7:05:42 AM
Module: 310204b
Version:
Page: 44
Comment: Self-Test #9: Answer is wrong. From the notes on Pg. 25 it states that reciprocating compressors are “being replaced by rotary for pressures under 7000 kPag. Thus reciprocating would be used on pressures higher than 7000 kPag or “High Pressures” as I believe the answer should be.
Status: Approved

Date: 12/18/2019 7:05:53 AM
Module: 310204b
Version:
Page: 44
Comment: Answer is wrong. From the notes on Pg. 25 it states that reciprocating compressors are “being replaced by rotary for pressures under 7000 kPag. Thus reciprocating would be used on pressures higher than 7000 kPag or “High Pressures” as I believe the answer should be. Would be nice if the questions followed the order of the information in the ILM.
Status: Approved

Date: 12/18/2019 7:06:05 AM
Module: 310204b
Version:
Page: 21
Comment: The bottom paragraph states that the gas “moves to the diffuser and decelerates…” I believe “diffuser” should be replaced with “discharge” as the discharge provides the restriction that decelerates the gas causing kinetic energy to be converted into pressure energy. The purpose of the diffuser is stated on page 22 as helping to “maintain the aerodynamic of the gas”.
Status: Approved

Date: 12/19/2019 7:47:04 AM
Module: 310204d
Version:
Page: 23
Comment: Low velocity and erosion are not “limitations” but rather are some conditions that could negatively affect separation in a cyclone separator.
Status: Approved

Date: 12/19/2019 7:47:16 AM
Module: 310204d
Version:
Page: 44
Comment: Self-Test #12: Should read “Which filter recharging/regeneration/cleaning method does not require…”
Status: Approved

Date: 12/19/2019 7:46:44 AM
Module: 310204e
Version:
Page: 27
Comment: On page 27 when discussing the Falling Film Evaporator the word “liquor” is used several times whereas the rest of the modules uses the term “liquid”. This created some confusion for students wondering what this “liquor” was.
Status: Approved

Date: 12/19/2019 7:46:53 AM
Module: 310204e
Version:
Page: 2
Comment: Pg. 2 Last sentence of paragraph 4 should read: “Sandblasting is often required for the cleaning the OUTSIDE of the tube…”
Status: Approved

Date: 12/19/2019 7:47:25 AM
Module: 310204f
Version:
Page: 24
Comment: Pg. 24: Statement about glycol should be moved to the where the diagram is on page 26.
Status: Approved

Date: 12/19/2019 7:47:33 AM
Module: 310204g
Version:
Page: 3
Comment: Terms: “Distillate”, “Tops”, and “Bottoms” are terms that should be added to this section.
Status: Approved

Date: 12/19/2019 7:48:31 AM
Module: 310204g
Version:
Page: 11
Comment: Tower Reflux: This paragraph states that adding reflux “improves the quality of the reflux”. While that is essentially true, it is a strange statement when put that way.
Status: Approved

Date: 12/17/2019 6:42:46 AM
Module: 310204h
Version: 1.1
Page: 34
Comment: Figure 46 on page 34, the two diodes on the right side of the bridge rectifier are shown connected in the reverse polarity direction to what they should be
Status: Approved

Date: 5/31/2019 11:16:52 PM
Module: 310204i
Version: 2
Page: 1
Comment: Far too much material in this module. If the students are expected to know and master everything in each module, then this is an impossible task for this module.
Status: Approved

Date: 12/19/2019 7:49:19 AM
Module: 310204i
Version:
Page: 15
Comment: Objective 3: Use a PFD to explain the major processes, flows, and unit operations for an oil refinery. This is covered on pages 15 to 34. No fewer than 14 process are explained in this section with some having multiple sub-processes or different methods of completing said process. Are all these considered “major”? Is there a simpler way to present this information in a manner where it has a chance to be absorbed and retained by a student?
Status: Approved

Date: 12/19/2019 7:49:09 AM
Module: 310204l
Version:
Page: 28
Comment: Self-Test #11: The answer is correct but the letter should be C not D.
Status: Approved

Date: 12/19/2019 7:49:29 AM
Module: 310204m
Version:
Page: 19
Comment: Self-Test #8: Not easily answered from the notes. Nowhere that I could find does it say the valve must be “sealed”.
Status: Approved

Date: 12/19/2019 7:49:37 AM
Module: 310204p
Version:
Page: 9
Comment: The last paragraph should be corrected to say: “Figure 6A indicates that 0 V is measured ACROSS THE TERMINALS with a tester” instead of “measured to ground”.
Status: Approved