[Class B Hazardous Materials] How can I increase my correct answer rate?

Thanks to everyone's support, I was able to pass the Class B Group 2 Hazardous Materials Engineer exam.

By the way, hazardous materials are classified into groups 1 through 6, and the ones I have obtained are Class B Group 4 and Class B Group 2.

Class B Group 4 is famous for being the qualification that allows you to work at a gas station.
Since it deals with gasoline, it is classified as a "flammable liquid."

I think over 90% of people move on to other hazardous materials qualifications after first obtaining Class B Group 4. (Excluding the strong individuals who take the Class A exam right away.)
Therefore, those taking exams other than Class B Group 4 are eligible for subject exemptions, and you pass if you get at least 60% correct on the properties of the relevant substances.
I took the Class B Group 2 exam last time and got every question right.

Setting aside whether or not you can get a perfect score, I noticed something this time, so I'm going to write down a strategy.

Actually, for subjects other than Class B Group 4, the test papers are bundled together. Because they are bundled, there are often many hints.

Some of you might have done this in the past, but it's like that thing where you look for hints in kanji during a Japanese language test (lol).

It is also possible to deduce the correct answer from tests of other groups. (Though it requires deductive reasoning.)

If you are ever unsure about a judgment, it's a good idea to read the questions for other groups carefully during your review to see if there are any contradictions.
I increased my correct answer rate by at least one question using this method (^_^)v