1. App Introduction
- Includes explanation/selection questions that require memorization among past questions in the firefighting facility engineer (electricity) practical test
- Calculation/construction problems are excluded because learning with mobile phone apps is not appropriate
- Contains about 10 years of problems from 2013 to 2023 1st round
- Appropriate for learning while on the go or using the time between breaks

2. Features
- Learning by arranging problems by topic or year
- Equipped with various learning methods such as putting parentheses on keywords, learning acronyms, and learning by paragraph
- Utilize the wish function to focus on learning the problems that the user has wished for
- Learning to listen repeatedly until familiar with the TTS function
- Easy and quick memorization by using a combination of multiple functions
- New questions will be continuously updated
- Long press the question mark button for 2-3 seconds to see how to use it
- Visit http://www.usefulpen.com to learn more.