If you need help studying for the Power Plant Maintenance Selection System (MASS) exam or just want some more information about what the test is like, you’ve come to the right place.
Click below to take a free MASS practice test!
What’s on the Exam?
There are 118 multiple-choice questions on the exam, which are grouped into four sections, and the time limit is about 2 hours.
These are the different sections of the exam:
1. Reading Comprehension
36 questions | 30 minutes
You’ll be given five short passages to read, and each one will have several multiple-choice questions that follow.
2. Mechanical Concepts
44 questions | 20 minutes
Here’s an example of what one of these questions looks like:
You won’t need to do any math, but you will need to think about how machines and tools work.
3. Assembling Objects
20 questions | 15 minutes
Some questions show parts labeled with letters, and you’ll match them up to assemble the shape. Other questions are more like puzzles where you need to pick the image that shows the correctly assembled object.
Here’s an example of what one of these questions looks like:
4. Mathematical Usage
18 questions | 7 minutes
You’ll be given some reference information at the start, like how many quarts are in a gallon, and then you’ll use that to answer multiple-choice questions.
How to Register
To register for the test, you’ll need to contact the electric company you want to work for. They will be able to give you more information.
When you register, you’ll also need to submit the testing fee, which varies from state to state.
MASS Study Guide
Get practice questions, detailed study lessons, and complex subjects broken down into easily understandable concepts.


Exam Scores
Each section of the test is scored separately, then are combined into an overall index used to predict success in plant maintenance roles.
Once you finish the test, your score will be sent to the electric company for evaluation. They generally won’t tell you your exact score, but you should know whether you passed or failed within a couple of weeks.
Online MASS Prep Course
If you want to be fully prepared, Mometrix offers an online MASS prep course. The course is designed to provide you with any and every resource you might want while studying. The MASS course includes:
- Review Lessons Covering Every Topic
- 350+ MASS Practice Questions
- Over 20 Instructional Videos
- Money-back Guarantee
- Free Mobile Access
- and More!
The MASS prep course is designed to help any learner get everything they need to prepare for their MASS exam. Click below to check it out!
FAQs
How many questions are on the MASS test?
The test contains 118 questions.
What is the time limit for the MASS test?
The test is timed at about 2 hours.
What is the passing score for the MASS test?
The passing score varies from company to company.
How much does the MASS exam cost?
The cost of the test varies from state to state.