General Instructions: There are 21 questions in this exam. All can be answered using only the NCEES supplied reference handbook. The level of difficulty is consistent with what you will encounter on the actual test.


This exam contains questions from every major knowledge area of the PE TFS exam: Thermodynamics & Energy Balances, Fluid Mechanics & Hydraulics, Psychrometrics & HVAC, Heat Transfer & Heat Exchanger Analysis, and Supportive Knowledge.


You will have 2 hours and six minutes to complete this exam. We recommend you set aside a time and place where you will not be interrupted. The clock indicating the time left will always be at the top right corner of the screen. If you need a break, or are interrupted, you will be able to save your work by clicking on "Save and Continue" at any point during the exam. You will then be provided a unique URL with your saved results. When you use your unique URL to resume the exam, the clock will begin the countdown where you last left it.


You will only be able to see one question at a time. You have the ability to flag any question and come back to review flagged questions. You will also be provided a running count of questions that have been answered so you can check if you have answered every question before submitting. You can only move forwards or backwards one question at a time, just like in the real exam.


You may find it useful to have a two-screen arrangement. Have the reference handbook on another screen and use a PDF software that allows you to draw lines on it. You will need that for this exam.


At the end of the exam, you will be taken to a screen with your results showing the number of questions you answered correctly out of 21 and how much total time you spent on the exam. For this free version, you will not be able to see which particular ones you answered correctly and which particular ones you answered incorrectly or how long it took you to answer each individual question. You can take the exam as many times as you wish, but you will have to enter your information here again each time.


In the paid version of this exam, your results report will include which questions you answered correctly and which ones you answered incorrectly and how much time you spent on each question. Additionally, you will get a document with step-by-step solutions in exquisite detail to every question in the exam. The paid version can be purchased in our store page (Select Product #1: PE Mechanical TFS Online Diagnostic Exam "A" Solutions)

Good luck!!!


We are pleased to offer you access to this online diagnostic exam, free of charge. However, the exam is our intellectual property and we require you to agree to the terms and conditions of the license agreement before proceeding. By entering your information below and taking the exam you are agreeing to the terms of the license agrement which is available for your review by clicking on the link at the bottom of this page.