Instrumentation and Control Technician (INT)

Third Period Package (53 Modules) Comments

Date: 5/31/2019 11:16:30 PM
Module: 310301a
Version: 1
Page: 24
Comment: The solution for the R Loop max is shown as 525 ohms. The correct value is 575 ohms.
Status: Approved

Date: 5/31/2019 11:16:29 PM
Module: 310302a
Version: 1.1000000000000001
Page: 26
Comment: This is a % of reading question, there for the answer should be: .005 x 144.3= 0.7215
Status: Approved

Date: 5/31/2019 11:16:29 PM
Module: 310302a
Version: 1.1000000000000001
Page: 28
Comment: question 13. answer should be 0.0005 not 0.0004 (0.02/100)1 + 3(0.0001)= 0.0005
Status: Approved

Date: 1/22/2020 12:26:04 PM
Module: 310302a
Version: 1.1
Page: 15-17
Comment: It seems to me technology has evolved to the point that it is difficult to find an manual ranging meter that we would use in our trade. Most newer devices like the fluke 725 have set resolutions, and we normally measure 30v or less. For example the 725 when reading a "aa" battery will display 1.234v, not 1.2345 and its resolution is .001 regardless of the range up to it's 30v max. So I am questioning the relevance of the whole 4 1/2 digit exercise. Opinions would be appreciated....
Status: Approved

Date: 11/22/2019 8:16:12 AM
Module: 310302f
Version: 1
Page: 47 and 10
Comment: Page 10 states that to improve sensitivity move the probe closer to vessel wall. Question three is incorrect in saying the answer is true. Moving the probe further from vessel wall should decrease sensitivity which would make question three false.
Status: Approved

Date: 5/31/2019 11:16:30 PM
Module: 310302o
Version: 2
Page: 23
Comment: Answer key is incorrect. If keeping this question the answer should be True; Gases are less viscous than liquids, so slippage is more of a problem.
Status: Approved

Date: 5/31/2019 11:16:52 PM
Module: 310304dB
Version: 2
Page: 30
Comment: Before the equation for L25, the sentence ends (C25). (C25) should be changed to (L25).
Status: Approved

Date: 5/31/2019 11:16:52 PM
Module: 310304dB
Version: 2
Page: 39
Comment: Before the equation for L25, the sentence ends (C25). (C25) should be changed to (L25). (The previous feedback submission had the wrong page number!)
Status: Approved

Date: 5/31/2019 11:16:52 PM
Module: 310304e
Version: 2
Page: 14
Comment: Table 4- for LPG applications, it is mentioned that for LPGs with vapour pressures up to 111.6 MPa (225psig). 111.6MPa is not 225psig. If you convert 111.6 MPa to psi, you will obtain 16186psi!!! I do not have access to ASTM D 1267-89 to verify what the vapour pressure is.
Status: Approved

Date: 5/31/2019 11:16:52 PM
Module: 310304e
Version: 2
Page: 30
Comment: Step 4 of operation for Vibrating Probe Viscometer need to be modified. Signal is inversely proportional to viscosity. See figure 1.71ac of Liptak (Fifth Edition, Volume II, Analysis and Analyzers)
Status: Approved

Date: 5/31/2019 11:17:03 PM
Module: 310305a
Version: 1
Page: 18
Comment: Figure 16: FIC-101 should be changed to FIC-102. OR FT-101 needs to be changed to FT-101 to match each other
Status: Approved

Date: 5/31/2019 11:17:03 PM
Module: 310305c
Version: 1.1000000000000001
Page: 29
Comment: last sentence, last paragraph. Reads: A proportional controller has one tuning parameter, which is the proportional gain (Kc), and a bias setting. Should read: A proportional controller has two tuning parameters, which is the proportional gain (Kc), and a bias setting.
Status: Approved

Date: 5/31/2019 11:16:29 PM
Module: 310305e
Version: 1.1000000000000001
Page: 6
Comment: The information on valve positioners as an example of a cascade loop if overkill. Positioners are a common occurance and have very little to no tuning ability. I reccommend reducing the information that starts on page 6 and ends at the bottom of page 7. Mention that as "An example, a positioner in a control loop is a simplified cascade control scheme. The positioner is high gain P-Only controller that has its setpoint set by the output of the main controller." Keep figure 5.
Status: Approved

Date: 5/31/2019 11:16:56 PM
Module: 310305e
Version: 1.1000000000000001
Page: 30
Comment: The suggested controller gain of 5 is far too high for the steam flow loop to which this example is pointing. Suggest the following: change the secondary controller gain from 5 to 0.5 Change the time span of the chart in figure 24 from 5 min to 1 min Change the subsequent period from 1.1 min to 0.24 min These changes will result in more realistic flow loop tuning parameters of Kc = 0.45 and a Ti of 2 min/repeat
Status: Approved