IST Practice Test

In today’s job market, employers look for people with the right mix of skills. The Industrial Skills Test (IST) is a tool to check if you’re a good fit for jobs in manufacturing, engineering, and construction. Practice with the free IST - Industrial Skills practice test on PracticeTestGeeks (7 questions with answer explanations).

This test checks your mechanical thinking, spatial skills, and hands-on abilities. It helps employers find people who can do well in these demanding fields.

IST Exam at a Glance

What changed for IST in 2026

• Oct 27, 2026: Delivery changed to Online by invitation; scratch paper and pencil/pen only (previously Online by invitation; scratch paper and pen/pencil only).^[2]
• Oct 27, 2026: Testing window changed to 5 calendar days upon receiving invitation email (previously 5 calendar days after the invitation email).^[2]

According to Pacific Gas and Electric Company, “This 36-item test measures the understanding of basic physical and mechanical concepts.”^[1]

IST content outline and where to practise each area

The content areas below are copied from the official IST content outline published by Pacific Gas and Electric Company. The right-hand column shows which of our practice sets covers it.

Worked examples: how to reason through IST questions

These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.

Example 1

Question: The passage suggests that using safety gear in industrial settings is important because:

1. It enhances productivity
2. It is required by law
3. It is part of employee training programs
4. It reduces the risk of injury

Answer: D. It reduces the risk of injury

Explanation:

D is correct. Safety gear such as hard hats, safety glasses, gloves and steel-toed boots puts a barrier between the worker and a hazard. Its main purpose is to lower the chance and the severity of injury. A is wrong because better productivity may follow, but it is not why the gear is worn. B sounds plausible, but the question asks what the passage suggests, and a legal requirement only counts if the text says so. C describes how workers learn about the gear, not why it matters. Rule to remember: on reading items, choose the answer the passage supports most directly, not one that is merely true in general.

Example 2

Question: Which property of a lubricant describes its resistance to flow?

1. Flash point
2. Viscosity
3. Pour point
4. Specific gravity

Answer: B. Viscosity

Explanation:

B is correct. Viscosity is a lubricant's resistance to flow. A thick, high-viscosity oil flows slowly and a thin one flows easily, and viscosity is usually the first property checked when matching an oil to a machine. A is wrong because flash point is the temperature at which the oil gives off enough vapor to ignite briefly. C is wrong because pour point is the lowest temperature at which the oil will still pour. It is linked to flow in the cold, but it is a temperature, not a measure of resistance. D is wrong because specific gravity compares the oil's density with water's. Rule to remember: viscosity means thickness, which means resistance to flow.

Example 3

Question: When is it appropriate to use a Type II hard hat?

1. When working in high-heat environments
2. When lateral impact protection is needed in addition to top protection
3. When electrical insulation is the primary concern
4. When working in confined spaces only

Answer: B. When lateral impact protection is needed in addition to top protection

Explanation:

B is correct. A hard hat's Type rating describes which direction of impact it protects against. A Type II hat protects against blows to the side as well as the top. You choose it where side impacts are possible, such as near swinging loads or moving equipment. A is wrong because the Type rating does not describe heat resistance. C is wrong because electrical protection is covered by a separate Class rating, not by the Type. D is wrong because Type II is not limited to confined spaces. It applies wherever side impacts are a hazard. Rule to remember: Type describes the direction of impact protection, and Class describes electrical protection.

How to use these practice tests

Start with PG&E's official IST preparation guide so you know what each test looks like. Then use our sets to build accuracy and speed on the same skills.

1. Take a baseline. Do one set each from IST Mechanical Aptitude, IST Reading Comprehension and IST Applied Mathematics, without notes. Note which areas cost you the most points and the most time.
2. Fix weak concepts. For mechanical items, read each explanation until you could explain the answer aloud. For reading, find the line in the passage that supports your choice. For numbers, read titles, labels and units before you calculate.
3. Practise under the real limits. Time yourself: 36 mechanical items in 20 minutes, and 25 items in 30 minutes for each of the other tests. Use only scratch paper and a pencil, as you will on test day.
4. Add workplace context. IST Tool and Equipment Usage and IST Workplace Safety and OSHA give you practice with industrial vocabulary that can show up in passages.
5. Plan around the window. You get only 5 calendar days after the invitation arrives. Do most of your preparation early and keep those days for a short review and a quiet place to test.

Free IST - Industrial Skills Test Study Tools

Interactive IST - Industrial Skills Test resources on PracticeTestGeeks, free to start:

• IST - Industrial Skills Test flashcards — review key terms and concepts card by card
• IST - Industrial Skills Test study guide — topic-by-topic overview of what the exam covers
• IST - Industrial Skills Test cheat sheet — one-page printable summary for last-minute review

Key Takeaways

Free IST Practice Test Online

• The Industrial Skills Test (IST) is a comprehensive assessment tool for evaluating technical, mechanical, and spatial abilities.
• The IST is widely used by employers in the manufacturing, engineering, and construction industries to identify candidates with the right practical skills and cognitive abilities.
• The test measures an individual’s mechanical reasoning, spatial visualization, and hands-on proficiency, providing a reliable indicator of their workplace readiness.
• Performing well on the IST can help job seekers demonstrate their suitability for roles that require a unique blend of technical aptitude and problem-solving skills.
• Preparing for the IST can help candidates showcase their strengths and stand out in a competitive job market.

What is the IST Test?

Understanding the Industrial Skills Test (IST) Test

The Industrial Skills Test (IST) is a detailed test that checks how well someone can do industrial and technical tasks. It looks at skills like mechanical reasoning, spatial visualization, and technical comprehension. Companies use the IST to find people who have the right skills and problem-solving abilities for industrial and technical jobs.

The IST Test is a well-known tool that checks if someone is good at industrial and technical work. It tests skills such as:

• Understanding and applying mechanical principles
• Visualizing and interpreting spatial relationships
• Understanding technical information and concepts
• Showing problem-solving and critical thinking skills

This test gives employers important information about a candidate’s skills and readiness for the job.

Why is the IST Test Important?

The IST Test is key in hiring for industrial and technical jobs. Companies use the test to see if a candidate has the right skills and abilities for the job.

This test gives a clear view of a candidate’s skills, helping employers make the best hiring choices. By using the IST Test, companies can build a skilled team ready for the challenges of the industrial and technical fields.

Key Components of the Industrial Skills Test

The industrial skills test (IST) is a detailed check-up. It looks at how well someone fits into industrial and technical jobs. It has several parts that together give employers a full view of a candidate’s skills.

The mechanical reasoning part is a big deal. It tests how well a candidate knows basic mechanical stuff. It also checks their skill in solving problems with their hands.

Then, there’s the spatial visualization test. This part sees if someone can picture objects in their mind. It’s key for jobs that need understanding technical drawings or complex systems.

The technical comprehension part tests how well a candidate gets science and engineering ideas. It looks at their skill in applying this knowledge to real situations. It also checks their problem-solving skills in tech areas.

Lastly, the IST has a hands-on practical skills evaluation. This part looks at how well someone can do specific tasks. It checks their use of tools and their hand skills. It shows if they’re ready for the physical parts of industrial jobs.

With these main parts, the industrial skills test (IST) gives employers a full view of a candidate’s skills. This helps in picking the right people for industrial and technical jobs.

Sample IST - Industrial Skills Test Practice Questions

Try these questions from our free IST - Industrial Skills Test practice tests. The correct answer and an explanation follow each question.

1. What does the acronym 'PPE' stand for in an industrial workplace?

   • A. Personal Protective Equipment
   • B. Preventive Plant Evaluation
   • C. Primary Process Efficiency
   • D. Plant Protection Equipment

Answer: A. Personal Protective Equipment

PPE stands for Personal Protective Equipment, which includes items like gloves, helmets, and safety glasses.

Answer: B. Identify → Analyze → Fix → Verify

The standard problem-solving sequence is: Identify the problem, Analyze root causes, Fix the issue, then Verify the fix worked.

Answer: B. To monitor process variation over time and detect trends

Control charts display process data over time, helping identify trends, shifts, or out-of-control conditions before defects occur.

Answer: B. To transport materials from one location to another

Conveyor belts are fundamental components in industrial settings, designed specifically for the efficient and continuous movement of goods, products, or raw materials. Their primary role is to automate the transportation process, moving items along a fixed path within a facility. This function streamlines operations and reduces the need for manual carrying.

Take the full IST - Industrial Skills Test practice test

Sources & last verified

1. Pacific Gas and Electric Company — number of questions, time limit, eligibility, other (official source). “This 36-item test measures the understanding of basic physical and mechanical concepts.” Verified Oct 29, 2026 · source checked Oct 26, 2026.
2. Pacific Gas and Electric Company — retake policy, delivery, testing window (official source). “The second attempt must be no earlier than 90 calendar days after the first attempt.” Verified Oct 27, 2026 · source checked Oct 26, 2026.

How we verify: editorial & fact-checking policy. Report an error: contact us.