Free EEI MASS Practice Tests (2026)
Start with the free diagnostic to see where you stand, then practice in tutor or timed mode. Full-length simulations match the real EEI MASS.
Diagnostics
EEI MASS Practice Test 1
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testPractice tests
EEI MASS Practice Test 2
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 3
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 4
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 5
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 6
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 7
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 8
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 9
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 10
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 11
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 12
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 13
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 14
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testEEI MASS Practice Test 15
10 questions · 10 min10 free EEI MASS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testHow these EEI MASS practice tests match the real exam
The real EEI Power Plant Maintenance Selection System (MASS) has 118 questions and a 72-minute time limit. Question types: Single-answer multiple choice. Reading Comprehension has 36 questions on five passages of power plant training-manual material. Mechanical Concepts has 44 picture-based questions with three answer choices each. Assembling Objects has 20 questions in which you choose which of four pictured assemblies shows the parts correctly put together, by matching lettered points or fitting puzzle-like pieces. Mathematical Usage has 18 questions worked from facts given at the start of the test, with five choices, the last being N (the correct answer is not given). Each practice test here uses the same question formats, so you get used to how EEI MASS questions are asked before test day.
The tests draw on every EEI MASS content area, weighted like the official outline:
- Reading Comprehension (about 31% of the exam)
- Mechanical Concepts (about 37% of the exam)
- Assembling Objects (about 17% of the exam)
- Mathematical Usage (about 15% of the exam)
Use tutor mode to see the explanation after each answer, or timed mode to practise at real exam pace. Every answer comes with an explanation of why it is right and why the other options are wrong.