Millwright (MIL)

2020 Outline - Second Period Package (26 modules) Comments

Date: 10/3/2022 10:15:19 AM
Module: 160201a-cA
Version: 24
Page: 4
Comment: In Table 2 under "Disadvantages". the 3rd comment down should read "...with wax deposits" not "...with was deposits"
Status: Implemented

Date: 10/5/2022 11:22:20 AM
Module: 160201a-cA
Version: 24
Page: 13
Comment: The text between the bottom two notes doesn't apply to to what content (horizontal misalignment). No shims involved in making a horizontal move. Should be removed.
Status: Implemented

Date: 9/27/2022 11:58:53 AM
Module: 160201a-cA
Version: 24
Page: 19
Comment: In the first bullet in the middle of the page the temperature in bracket "68" degrees F and should be "36" degrees F. The text is talking about a "change" of 20 degrees C. In degrees F that would be 36 degrees (20 x 1.8).
Status: Implemented

Date: 11/1/2023 8:06:09 AM
Module: 160201a-cA
Version: 25
Page: 9
Comment: Question 1 Answer is incorrect. Should be journal not collar.
Status: Approved for Review

Date: 8/16/2023 2:22:28 PM
Module: 160201a-cB
Version: 25
Page: 15
Comment: Fig13 graphic does not show filling slots as indicated by the text above the Fig 13.
Status: Approved for Review

Date: 12/1/2023 1:33:30 PM
Module: 160201a-cB
Version: 25
Page: 15
Comment: Double row deep groove ball bearing have no loading/filling slots as the desription implies.
Status: Approved for Review

Date: 10/18/2023 2:32:24 PM
Module: 160201a-cB
Version: 25
Page: 9
Comment: In the first statement on the page it talks of "loading on a deep single row angular contact ball bearing". We need to remove the word "deep". It should read " loading on a single row angular contact ball bearing".
Status: Approved for Review

Date: 12/6/2023 3:42:56 PM
Module: 160201a-cB
Version: 25
Page: 33
Comment: Table 1 is obsolete. For example, SKF 3306 and 5200 bearings are both double row angular contact bearings and 304 is a maximum capacity ball bearing which contradict what the table states.
Status: Approved for Review

Date: 9/26/2023 1:39:37 PM
Module: 160201a-cF
Version: 25
Page: 5,6 and 15
Comment: The section discussing the thrust bearing clearance calculations has some errors specifically in table 5 and the preceding paragraph. The change required on the left and right bearings to adjust the nozzle clearance would change the clearance in the wrong direction. The right bearing should have shims added and the left should have shims removed. The final shim thickness amounts would change accordingly. The second question on page 15 also needs the answer revised as the answer in the back indicates a move that would not correct the nozzle clearance correctly.
Status: Approved for Review

Date: 12/1/2023 1:46:05 PM
Module: 160201a-cF
Version: 1
Page: 15
Comment: Question 2 Have no idea what the answer is?
Status: Approved for Review

Date: 10/24/2023 11:55:39 AM
Module: 160201e
Version: 25
Page: 42
Comment: In the second paragraph the text states that the oil is "pulled from the reservoir". That is not correct. Pressure on top of the oil (atmospheric or other pressure) pushes the oil into the pump inlet.
Status: Approved for Review

Date: 10/3/2022 9:39:50 AM
Module: 160201fB
Version: 24
Page:
Comment: The text for "Drip Feed" is actually for "Constant Level" oilers. The drip feed oilers are a manual oiler. Someone needs to move the "snap lever" as you can see in figure 4, before any oil is added to the lubrication point. Also figure 5 is incorrect. The oil level is maintained at the top of the control arm, not the bottom. Trico Corp. calls this the control point on their constant level lubricators. There is a good document (The Constant Level Oiler – Understanding the Lubrication Principle) on their website. It also gives a good description on how the function.
Status: Approved for Review

Date: 10/3/2022 10:11:16 AM
Module: 160201fB
Version: 24
Page:
Comment: More description for the comment that I just sent. The first bullet pertains to constant level lubricators but not drip feed lubricators. The second bullet pertains to drip feed lubricators but "constant level cup" should be replaced with something like "drip feed reservoir" or "drip feed bottle" to avoid confusing it with the Constant Level Lubricator. I think the confusion is that there are two types of lubricators that "drip" oil into the lubrication point (drip feed lubricator and constant level lubricator). Figure 4 (on page 5) is a drip feed lubricator and Figure 5 (on page 6) is a constant level lubricator.
Status: Approved for Review

Date: 11/9/2023 8:22:26 AM
Module: 160202aA
Version: 25
Page: 46
Comment: On the top of the page it states that there are 4 classes of fire, then it should what they are. Change "four" to "five" because there are five listed.
Status: Approved for Review

Date: 12/6/2023 3:57:00 PM
Module: 160202aA
Version: 25
Page: 14, 32, 46
Comment: Pg 14 - Acetone doesn't absorb acetylene, acetylene dissolves into acetone. Pg 32 - Rule of thumb stated for welding tip size (1psi of O2 and C2H2 per tip size) but it's my understanding that the torch is to be balanced (next module), not pressure set. Pg 46 - There are five classes of fire, not four.
Status: Approved for Review

Date: 12/6/2023 3:59:54 PM
Module: 160202aB
Version: 25
Page: 19
Comment: I believe Table 2 column 9 row 3 should read 50 or 55.
Status: Approved for Review

Date: 5/15/2023 4:22:52 PM
Module: 160202c
Version: 21
Page: 9
Comment: Figure 6. The engaged and disengaged labels in the top right of the image are backwards. The black shows the engaged position and the white shows the disengaged position.
Status: Approved for Review

Date: 11/2/2023 12:16:10 PM
Module: 160202c
Version: 25
Page: all of them
Comment: I find that the book is all over the map and is not laid out in logical order at all. The majority of the information is there but is in need of being reorganized. The book talks about stick welding for several pages and then with no real warning jumps to mig and or tig. As an example on pages 54 and 55 they talk about effects of polarity and also arc blow with regards to stick welding , then on the very next page they want to talk about what a chipping hammer and wire brush are used for (this is just not a logical order) and on the very next page they jump to starting procedures for arc initiation with a tig torch.
Status: Approved for Review

Date: 12/6/2023 4:02:57 PM
Module: 160202c
Version: 25
Page: 51
Comment: The right image in figure 38 and the bottom left image in figure 39 are the same setup but are stating different angles are needed.
Status: Approved for Review

Date: 12/1/2023 2:04:40 PM
Module: 160202d
Version: 25
Page:
Comment: Can we add back Eddy currant testing like old module? Maybe not as detailed as before? I feel as a Millwright , eddy currant is in are wheel house.
Status: Approved for Review

Date: 12/1/2023 2:02:05 PM
Module: 160202d
Version: 25
Page: 52
Comment: We need to add back dwell time and cleaning a minumum of 1" around crack Step 1. clean area of suspected crack min 1" Step 2. apply penetrant to surface and let dwell ...Step 3. ...
Status: Approved for Review

Date: 11/21/2023 4:20:09 PM
Module: 160202d
Version: 25
Page: 80
Comment: The answer for question #6 in "Metal Classification and Composition Activity Answers" is wrong. The answer should be true based on the information on page 18. Also the question numbers are messed up for this activity on page 80. right now it reads 1, 2, 3, 1, 2, 3, 4 and should read 1, 2, 3, 4, 5, 6, 7
Status: Approved for Review

Date: 12/6/2023 4:11:10 PM
Module: 160202d
Version: 25
Page: 13, 30, 31, 32
Comment: Pg 13 - The top of the page should read "......and more responsive to heat treatment. Its mechanical properties......." Pg 30 - First paragraph should read ".....be hard to resist wear or soft to be machined easier." Pg 31 - Middle of page has pearlite incorrectly spelled. Pg 32 - Table 5 and the paragraph above it contradict the phase change diagram on Pg 31 which states hardening temperature increases as carbon content increases.
Status: Approved for Review

Date: 1/16/2024 10:08:50 AM
Module: 160202d
Version: 25
Page: 79, 80, 81
Comment: Under "metal classification...", the numbering is off and 3 which should read 6 is incorrect. Martensitic stainless can be hardened Under "heat treatment...", 2 has a typo and should read b) 1410 to 1460 Under "non-destructive...", 4 has a typo and should read d) ultrasonic #18 doesn't have a correct option. The answer should be 0.30%
Status: Approved for Review

Date: 12/11/2023 4:00:58 PM
Module: 160203a-bA
Version: 25
Page: 15
Comment: In the NOTE box, it indicates that a 180J6 poly v-belt would be 180 inches long. All the 180J6 belts that I can find online are 18.0" long. https://www.motioncanada.ca/products/sku/00721519 And a 185J6 comes up as an 18.5", so the last digit should be after the decimal point, although I do not have a copy of the RMA coding standard to confirm. https://www.beltingonline.com/j-section-polyv-belts-c-513_1240/470j6-185-inch-x-6-ribs-poly-vflex-belts-p-17285.html
Status: Approved for Review

Date: 12/6/2023 4:18:59 PM
Module: 160203a-bA
Version: 25
Page: 31
Comment: Pg 31 - First note should read "Runout on the face"
Status: Approved for Review

Date: 2/16/2024 4:16:54 PM
Module: 160203a-bA
Version: 25
Page: 46
Comment: The top paragraph mentions flanges should be in various applications of "horizontal" and "vertical drives". These applications should be changed to "horizontal shaft positions" and "vertical shaft positions".
Status: Approved for Review

Date: 12/1/2023 1:54:18 PM
Module: 160203a-bB
Version: 25
Page: 12
Comment: Figure 14 is a bad picture of sythetic drive chain. The old picture was good.
Status: Approved for Review

Date: 12/13/2023 1:18:05 PM
Module: 160203a-bB
Version: 25
Page: 65
Comment: The second paragraph under "Multiple Sprocket Installation" talk about runout problems and mentions that you can check runout with a dial indicator by following the procedure in Figure 83. Figure 83, however, shows a process for alignment checks with a straight edge and level, not runout checks with a dial.
Status: Approved for Review

Date: 12/6/2023 4:24:26 PM
Module: 160203a-bB
Version: 25
Page: 18, 43
Comment: Pg 18 - The first bullet under chain length may need to be edited Pg 43 - Table 2 column 3, row 2 should read 2200 I believe
Status: Approved for Review

Date: 1/16/2024 9:51:56 AM
Module: 160203a-bB
Version: 25
Page: 13
Comment: Double pitch chain does not fit all standard sprockets. I've read that it depends on sprocket size or it doesn't fit at all. It may be beneficial to remove that statement altogether.
Status: Approved for Review

Date: 12/7/2023 8:30:39 AM
Module: 160203a-bD
Version: 25
Page: 13, 16, 36
Comment: Pg 13 + 16 - Figure 15 and Figure 22 may not properly represent pressure angles. Most of the images I've come across aren't represented in that manner. Pg 36 - Second sentence in second paragraph. It's more about high ratios vs fewer starts when it comes to self locking.
Status: Approved for Review

Date: 12/6/2023 4:38:08 PM
Module: 160203a-bE
Version: 25
Page: 30, 39, 42
Comment: Pg 30 - Under stepper motor advantages last bullet - Stepper motors need to be powered in order to have holding torque so the last part of that bullet should be deleted Pg 39 - Second bullet should read shaft, not bore Pg 42 - Table 3 should read a b c cd d e
Status: Approved for Review

Date: 12/1/2023 1:40:32 PM
Module: 160203c
Version: 25
Page: 61
Comment: I believe question 4 has the wrong answer. 1440lbs. Maybe.
Status: Approved for Review

Date: 9/1/2023 9:02:08 AM
Module: 160203d
Version: 25
Page: 48
Comment: The objective activity three questions 7 and 8 have some errors. One of the errors is on the dial readings in Figure 33. The dials do not balance. Also the answer for H1 by reading the graph is -1.5 away from the datum which would round to -2 so the objective answer for question 8 should be -2 not -1. The graph for H2 and the answer match and do not need to be edited. To fix these questions, they may need to be completely redone.
Status: Approved for Review

Date: 10/5/2022 11:04:18 AM
Module: 160204a
Version: 24
Page:
Comment: This module causes confusion for the student because it isn't consistent in the figures. Sometimes the Fixed machine is on the left and the MTBM is on the right and in others it shows the Fixed on the right and the MTBM on the left. The graphics have been labeled correctly but it causes confusion for someone just learning the process. I suggest having all the figures show the Fixed on the right and the MTBM on the left. I feel that way because that is how we build the graph. We have the "A" dial on the far right side of the graph and work to the left to plot "B" dial and the feet on the MTBM. The figures that show the Fixed machine on the left are 6 and 9-14. If we could flip these graphics and correct the labeling all would be good. Some editing of the text may also be needed. Not a big job.
Status: Approved for Review

Date: 11/23/2023 10:08:44 AM
Module: 160204a-dA
Version: 25
Page: 53
Comment: Question 10 on page 53 asks to calculate the NPSHa The Answer on page 54 is just the result of subtracting the vapour pressure (VP) from the absolute pressure (PA) which results in (12.98 psia) The explanation of NPSHa and the calculating for NPSHa on page 19 doesn't appear to be in alignment with the method used to solve question 10 on page 53.
Status: Approved for Review

Date: 11/16/2023 9:20:49 AM
Module: 160204a-dA
Version: 25
Page: 8-9
Comment: These pages explain how we convert pressure (psi) into feet of head. On page 9 we give two formulas, Each formula contains a "constant". On page 8 we explain where ".433" comes from but we don't explain where "2.31" come from. .433 = 144 cubic inches of water / 62.4 pounds (for a cubic foot of water). 2.31 comes from flipping the area and weight. 2.31 = 62.4 pounds / 144 cubic inches. I think this needs to be added to the content.
Status: Approved for Review

Date: 10/2/2023 8:06:33 AM
Module: 160204e-g
Version: 25
Page: 41
Comment: Top of the page, Step 5 and Figure 43 The text reads correctly. But the letters "A" and "B" are backwards in the graphic. The line on the left is the reference line that you measure from to get the line on the right.
Status: Approved for Review

Date: 10/7/2022 9:38:12 AM
Module: 160205b
Version: 24
Page: 12
Comment: In the graphic in Figure 8 it shows "E" and it should show "E=?"
Status: Approved for Review

Date: 10/7/2022 9:41:05 AM
Module: 160205b
Version: 24
Page: 13
Comment: On the right side of Figure 9 it Reads "ED=", "LD=", and "ED=". It should read "E=", "L=", and "E="
Status: Approved for Review


Archived Comments

Year: 2021

4/30/2021 1:07:57 PM
Module: 160404b
Version: 21
Page: 3
Comment: The paragraph just above figure 3 states in the last sentence that the balance holes are to improve efficiency. They are to improve shaft thrust characteristics but actually reduce efficiency and head because of fluid re-circulation. Change this sentence to read "... may have balance holes to reduce thrust." Check out this article on the relationship between balance hole size and the efficiency and thrust reduction. https://iopscience.iop.org/article/10.1088/1755-1315/240/3/032017/pdf
Status: Implemented

4/30/2021 12:55:13 PM
Module: 160404b
Version: 21
Page: 15
Comment: Figures 15 A and B are difficult to interpret. Please use colouring to create differentiation between the moving components (impeller) and the diffuser vanes.
Status: Implemented

Year: 2020

5/14/2020 10:08:36 AM
Module: 160202f
Version: 21
Page: 16
Comment: Figure 22. Pressure angle should read 14 1/2 degrees not 14.
Status: Implemented

5/13/2020 11:47:29 AM
Module: 160202dB
Version: 21
Page: 24
Comment: Figure29. This is not a picture of fitting a QD bushing. Picture of a person torqueing the front balancer on a engine.
Status: Implemented

5/13/2020 11:24:54 AM
Module: 160202dB
Version: 21
Page: 14
Comment: Figure 15 and 16. Not showing the difference between a pully and a sheave. Fig 15 is completely wrong. Showing a V belt arrangement (sheave) not a pully.
Status: Implemented

5/13/2020 10:47:18 AM
Module: 160202dA
Version: 21
Page: 17
Comment: Figure 19. Bad picture/ labeled wrong. I wish that all the old pictures were put back from Goodyear and Gates.
Status: Implemented

5/13/2020 10:42:56 AM
Module: 160202dA
Version: 21
Page: 10
Comment: Figure 10. Bad picture of double V belt. Replace or put back old picture.
Status: Implemented

5/13/2020 10:40:33 AM
Module: 160202dA
Version: 21
Page: 10
Comment: Figure 9. Bad picture of banded belt. Replace or put back old one.
Status: Implemented

5/13/2020 10:38:39 AM
Module: 160202dA
Version: 21
Page: 9
Comment: Figure 8. Old picture was better.
Status: Implemented

5/13/2020 10:36:59 AM
Module: 160202dA
Version: 21
Page: 4
Comment: Figure 2. Wrong figure # and description. Put back parts of a V-belt courtesy of Goodyear.
Status: Implemented

5/13/2020 9:34:00 AM
Module: 160202a
Version: 21
Page: 13
Comment: Figure 14. Remove dash. 14-125
Status: Implemented

5/13/2020 9:32:26 AM
Module: 160202a
Version: 21
Page: 5
Comment: figure 5. Bad picture. Find a better one or put back Martin picture. How come some Martin pictures are O.K but not others? Figure 7 from Martin is O.K but not figure 5 is not/
Status: Implemented

5/7/2020 1:39:11 PM
Module: 160201dB
Version: 21
Page: 7
Comment: Figure 5. The A&B are reversed. Should read antifriction A and Plain bearings B
Status: Implemented

5/7/2020 9:26:38 AM
Module: 160201dA
Version: 21
Page: 33
Comment: Figure 40. No reference to figure 40 In description.
Status: Implemented

5/7/2020 9:23:09 AM
Module: 160201dA
Version:
Page: 7
Comment: Figure 7. Wrong picture. Put back SKF. Picture of crank shafts not of bearing and housing.
Status: Implemented

5/5/2020 1:27:41 PM
Module: 160201bB
Version: 21
Page: 41
Comment: Figure 37. Extra "courtesy of"
Status: Implemented

5/5/2020 1:25:51 PM
Module: 160201bB
Version: 21
Page: 28
Comment: Figure 24. Mislabeled
Status: Implemented

5/5/2020 1:22:32 PM
Module: 160201bB
Version: 21
Page: 22
Comment: Figure 18 Wrong picture. Should be narrow feeler gauge not wide. Put back Starrett picture.
Status: Implemented

5/4/2020 1:54:44 PM
Module: 160201bA
Version: 21
Page: 21
Comment: Figure 28 Mislabeled. There is 2 figure 28. Second should be Tapered roller bearings. Overall this module should return to the previous version.
Status: Implemented

5/4/2020 1:47:51 PM
Module: 160201bA
Version: 21
Page: 19
Comment: Figure 27. Not a drawn cup needle bearing. Return SKF picture.
Status: Implemented

5/4/2020 1:44:27 PM
Module: 160201bA
Version: 21
Page: 10
Comment: There is 2 figure 10s. Should be 11, and reworded to match.
Status: Implemented

5/4/2020 1:39:05 PM
Module: 160201bA
Version: 21
Page: 4
Comment: Figure 3. Not the best picture. Return SKF picture.
Status: Implemented

5/4/2020 1:36:38 PM
Module: 160201bA
Version: 21
Page: 10
Comment: Figure 11 is miss labeled.
Status: Implemented

5/4/2020 1:33:58 PM
Module: 160201bA
Version: 21
Page: 10
Comment: Figure 10 is the wrong picture of maximum capacity bearing. Return the SKF picture.
Status: Implemented

3/24/2020 8:53:34 AM
Module: 160202b
Version: 21
Page: 22
Comment: The first line in the description of the pin and disc coupling is incorrect. It has been copied from the previous page describing the splined rubber coupling.
Status: Implemented

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