Automotive Service Technician (AST)

2012 Guide - Fourth Period Package (23 Modules) Comments

Date: 9/1/2026 7:40:45 AM
Module: 090401e
Version: 1st Edition
Page: 18
Comment: Objective Two Activity, Question 15: Incorrect answer and poor distractors. I suspect the correct answer should be Automatic Transmission Fluid Viscosity.
Status: Approved for Review

Date: 6/1/2026 11:22:39 AM
Module: 090403a
Version: 1st Edition
Page: 69-80
Comment: The superheat and subcooling in Celsius is still wrong. The numbers cannot be negative. The calculation was done based on a straight-across conversion from F to C, when really it is a range of X deg. F to Y deg. F.
Status: Approved for Review

Date: 8/28/2026 9:45:59 AM
Module: 090403a
Version: 1st Edition
Page: 20
Comment: “Zoetrope” should be corrected to “zeotrope”
Status: Approved for Review

Date: 8/28/2026 9:55:31 AM
Module: 090403a
Version: 1st Edition
Page: 17
Comment: Figure 8 shows a refrigerant drain bottle, not an oil fill bottle as described in the text. This can be verified in the Robinair Operators Manual, pages 6-7. Please use the following link: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.robinair.com/sites/default/files/documents/OperatorManual_AC1234-9_SP01500318_1.pdf
Status: Approved for Review

Date: 8/28/2026 10:14:57 AM
Module: 090403a
Version: 1st Edition
Page: 20
Comment: The text in the last paragraph states, "Recovering this mixture into an air conditioning machine will result in damage to the vehicle." The word "vehicle" should be changed to "recovery machine", as it does not affect the vehicle in this context.
Status: Approved for Review


Archived Comments

Year: 2019

11/15/2019 9:25:47 AM
Module: 090404b
Version: 3
Page:
Comment: When instructing theory lessons on hybrid operations and components, the module references the DC to DC converter several times, occasionally calling it an inverter. The inverter performs DC to AC functions, and vice versa, but the CONVERTER performs DC to DC functions. Unfortunately, with the terms converter and inverter both being used to describe the same component, a few students have brought in to my attention in confusion. They understand that the converter can be built into the inverter module, but require that separation of terms for clearer instruction. Thank you.
Status: Implemented