Get ready for your utility industry career with our MASS Practice Test resources. The EEI MASS Test (Maintenance Positions Selection System) is the industry standard assessment used by power companies to select candidates for maintenance jobs in fossil, hydro, and nuclear power plants. Passing the EEI MASS Test is crucial for securing a position as a mechanic, machinist, or electrician.
Our comprehensive MASS Exam guide covers all four test batteries: Assembly, Mechanical Concepts, Reading Comprehension, and Math. Use our free MASS exam questions to familiarize yourself with the format and improve your speed and accuracy for the real Maintenance Selection System assessment.
The MASS test is administered by individual utility companies. Your score on the MASS exam is often transferable between different utility companies that use the EEI testing standard, valid for several years. Practice with the free MASS practice test on PracticeTestGeeks (7 questions with answer explanations).
Facts verified Oct 19, 2026 against Edison Electric Institute (EEI), Employment Testing Department. Dates that have passed are removed automatically.
| Item | Detail | Official source |
|---|---|---|
| Retake policy | 30 days between attempts; max 2 attempts in 12 months (Entergy) | jobs.entergy.com |
| Validity | Valid until the position requirements or the test change (Entergy) | jobs.entergy.com |
| Delivery | Paper, computer or testing center (chosen by the employer) | Edison Electric Institute (EEI), Employment Testing Department |
| Eligibility | Employer-invited applicants only; EEI does not test applicants directly | Edison Electric Institute (EEI), Employment Testing Department |
| Score release | Usually within 5 business days (Entergy); EEI does not send results to applicants | jobs.entergy.com |
Facts verified Oct 19, 2026 against Edison Electric Institute (EEI), Employment Testing Department. Dates that have passed are removed automatically.
Interactive MASS Test resources on PracticeTestGeeks, free to start:
Prepare for the MASS - Test exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
Quick review for the Maintenance Positions Selection System
This comprehensive MASS study guide helps you understand the key components of the EEI MASS test.
Estimated score calculation
Required to Pass: ~70% (Estimated)
Your Score: 105 correct ✓ PASS
Since the utility company covers the MASS test fee, your only investment is in preparation materials to ensure you pass.
Join thousands of successful candidates who used our MASS practice test to launch their careers in the power industry.
Your MASS test results are typically valid for a specific period or until you leave the industry.
Passing the MASS exam at one EEI-member utility often qualifies you at others, meaning you may not need to retest when changing jobs.
Try these questions from our free MASS Test practice tests. The correct answer and an explanation follow each question.
Why is a permit-to-work system used for high-risk maintenance tasks?
Answer: B. To formally document hazards, controls, and authorization before work begins
Permit-to-work ensures hazards are identified and controls authorized so work proceeds only under safe conditions.
If a load chart lists capacities for 'fully extended outriggers,' using mid-extended outriggers means you must:
Answer: A. Use the lower mid-extended capacity column instead
Reduced outrigger spread narrows the stability base, so a separate, lower capacity column applies.
Which of the figures below is a rotation of the original figure and NOT a mirror image? (Image showing one original asymmetrical 3D object and four other 3D objects would be here)
Answer: B. Figure B
Figure B is the only object that can be achieved by rotating the original object in space. Figures A, C, and D are mirror images (or enantiomorphs), meaning their features are reversed as if seen in a mirror, and they cannot be superimposed on the original through rotation alone.
An operator has a valid Dig Safe ticket and a yellow line has been painted on the ground, indicating a natural gas pipeline. What is the mandatory procedure for digging within the 'tolerance zone' of this marking?
Answer: B. Excavation must be performed using non-mechanical means, such as hand digging.
The tolerance zone is defined as the width of the utility plus 18 inches on each side. Within this zone, Massachusetts law explicitly prohibits the use of mechanized equipment to prevent damage. Excavators must use non-mechanical means, like hand tools or vacuum excavation, to carefully expose the utility.