This is a collection of question-and-answer format questions for crane and derrick operator (no limitation) exam preparation.

【Features】
Questions are randomly selected from the selected category in a question-and-answer format.
It comes with the following features.
・Function to solve similar problems
- Ability to take notes after answering
・A function that allows you to search past memos
・A function to solve problems that you do not understand from the word book