CID Study Guide 2026
Everything you need to pass the CID exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CID Exam Format at a Glance
📚 CID Topics to Study (45)
✍️ Sample CID Questions & Answers
1. In the 60-30-10 rule of color distribution, the 10 percent typically represents what?
In the 60-30-10 rule, 10 percent is reserved for the accent color.
2. Which color rendering index (CRI) value is considered the minimum acceptable for spaces requiring accurate color perception, such as retail showrooms?
A CRI of 80 or above is considered the minimum acceptable threshold for spaces where accurate color rendering is important.
3. With regard to sole traders, drawings are not an allowable expense.
For sole traders, 'drawings' refer to money or assets taken out of the business by the owner for personal use. These are considered a reduction in the owner's capital, not an expense incurred by the business to generate revenue. Therefore, drawings are not an allowable expense for tax purposes and cannot be deducted from business profits.
4. Placing a bright yellow chair in an otherwise neutral gray room primarily uses which principle to draw attention?
Strong difference in color creates contrast that pulls the eye to the chair.
5. What is bilateral symmetry?
Bilateral symmetry is a specific type of symmetrical balance where a composition can be divided by a central axis, and both sides are essentially mirror images. While the definition provided mentions 'slight variation,' in its purest form, bilateral symmetry implies near-perfect mirroring. It's a fundamental concept in biology and art, creating a sense of order and recognition.
6. Which flooring material is naturally antimicrobial and made from renewable cork oak bark?
Cork is harvested from bark, is renewable, and has antimicrobial properties.