JobTestPrep's Preparation Service

JobTestPrep has created simulation tests and study guides to assist candidates applying for jobs in engineering and emergency services in succeeding on the Mechanical Test—Blue Battery. Our thoughtfully designed resources improve applicants' knowledge of mechanics and electronics. Computations tests also included in our PrepPack™ sharpen candidates' numerical skills and enhance the accuracy and speed of their calculations. Another cognitive ability trained with JobTestPrep’s materials is logical and symbolical reasoning, which is important when working with machinery and equipment.

  • The Mechanical Comprehension
  • The Computation 
  • The Symbolic Reasoning 
  • The Visual Speed and Accuracy 

The Mechanical Test – Blue Battery

The Mechanical Test—Blue Battery is a part of SDG&E pre-employment assessment and is designed for prospective employers vying for technical and engineering positions. The Blue Battery test offered by SDG&E consists of three sections, measuring candidates' knowledge of mechanics, arithmetic, and symbolic reasoning.

Mechanical Comprehension Test: This test assesses your knowledge of physical and mechanical concepts as well your ability to apply reasoning in a practical environment. Other topics are electrical circuits, levers, springs, gears, pulleys, and tools. The test evaluates not only your familiarity with these concepts but also your knowledge of their operating principles. Your ability to calculate the force required to operate a particular tool is measured as well.

The Computation Test: This test estimates your knowledge of arithmetic and your ability to perform operations with large numbers without a calculator. Numerical computation questions posed in the test involve basic principles of arithmetic such as addition, subtraction, multiplication, and division. You will also encounter questions that require performing operations with percentages, ratios, fractions, and decimals. It is a multiple-choice test, where each question is supplied with four answers, one of which is correct. Its time limit is five minutes.

The Symbolic Reasoning Test: This test measures how well you manipulate symbols according to formal mathematical and logical rules. It presents applicants with logical propositions that are expressed not verbally but visually, in the form of mathematical problems. It is a multiple-choice test that requires you to select between three alternatives— “True,” “False,” and “Indeterminable.” There are 30 problems in the test, which you need to complete within five minutes.  

The Visual Speed and Accuracy Test: This test assesses how quickly and accurately job candidates do tasks that require visual checking of data. It contains exercises that ask them to follow visual schema and check verbal, numerical, and technical information for errors. The test consists of two alpha-numeric strings of characters. Job applicants need to compare the two strings and decide whether they are the same or different. A time limit allotted for this test is only five minutes. 


Frequently Asked Questions and Answers 

Q: How many questions are there on the Mechanical Test?

A: The Symbolic Reasoning part of the test has 30 problems that you are required to solve within five minutes. Other parts of the test contain numerous questions. You answer as many as you can.

Q: What is the passing score for the Mechanical Test?

A: Your success on the Mechanical Test—Blue Battery is evaluated by so-called percentile score. This score measures your performance relative to other test takers. Thus, if you receive 79% for your Mechanical test, this does not mean that you have answered 79% of questions correctly. Your score rather means that you did better on the test than 79% of other job candidates.   

Q: How long do I have to wait to retake the Mechanical Test, if I fail it?

A: The Mechanical Test helps employers measure job candidates’ mechanical aptitude. Every organization has its own examination rules determining how often you can retake the assessment.


What's Included

  • 9 Mechanical Reasoning tests
  • A Mechanical Study Guide
  • & Basic Math Tests
  • 3 Math Study Guides
  • 3 error checking (visual accuracy) tests