16 Nail & Skin Science Practice Questions & Answers
Every Nail & Skin Science practice question from the Nail Technician Practice Test, with the correct answer and a short explanation.
Start practice test →1. Which structure is the living reproductive tissue at the base of the nail where nail cells are formed?
- A.Nail plate
- B.Matrix✓ Answer
- C.Nail bed
- D.Hyponychium
The matrix contains the living cells that produce keratinized nail cells; because it holds the blood vessels and nerves that supply nutrients, damage to the matrix can permanently deform or stop nail growth.
Source: NIC Nail Technology Content Outline: Nail Structure & Anatomy; Milady Standard Nail Technology, Nail Structure (Matrix)Report a problem with this question
2. The lunula (the whitish half-moon shape at the base of the nail) is the visible part of which structure?
- A.The end of the matrix✓ Answer
- B.The nail bed showing through
- C.Trapped air under the plate
- D.The eponychium fold
The lunula appears white because it is the visible part of the matrix; the newly formed, not-yet-hardened matrix cells beneath the plate reflect light differently than the pink nail bed behind the rest of the plate.
Source: Milady Standard Nail Technology, Nail Structure (Lunula = visible portion of matrix)Report a problem with this question
3. What is the primary difference between the cuticle and the eponychium?
- A.The cuticle is dead tissue on the nail plate; the eponychium is the living skin fold at the base✓ Answer
- B.The eponychium is under the free edge; the cuticle is at the base
- C.They are two names for the exact same tissue
- D.The cuticle is living skin; the eponychium is dead
The cuticle is dead, colorless tissue that sheds from the underside of the eponychium and adheres to the nail plate, while the eponychium is the living skin fold at the base; techs may push back and remove dead cuticle but must not cut living eponychium, which can cause infection.
Source: Milady Standard Nail Technology, Nail Structure (Cuticle vs. Eponychium)Report a problem with this question
4. The hyponychium is located at which part of the nail?
- A.On top of the lunula
- B.At the base, over the matrix
- C.Along the sides of the nail plate
- D.Under the free edge, where it meets the fingertip✓ Answer
The hyponychium is the slightly thickened skin beneath the free edge; it forms a protective seal that keeps bacteria and microorganisms from getting under the nail plate, so it should not be scraped aggressively.
Source: Milady Standard Nail Technology, Nail Structure (Hyponychium)Report a problem with this question
5. The nail plate rests on and is attached to which structure that supplies it with blood and nourishment?
- A.The nail fold (mantle)
- B.The nail bed✓ Answer
- C.The lunula
- D.The free edge
The nail plate sits on the nail bed, which is rich in blood vessels that give the nail its pink appearance; the free edge is not attached to the bed because the bed ends near the fingertip, which is why the free edge can be filed.
Source: Milady Standard Nail Technology, Nail Structure (Nail Bed & Free Edge)Report a problem with this question
6. What is the average rate at which a healthy adult fingernail grows?
- A.About 1/10 inch (2.5–3 mm) per month✓ Answer
- B.About 1/10 inch per year
- C.About 1 inch per month
- D.About 1/2 inch per week
A normal adult fingernail grows roughly 1/10 inch (about 2.5–3 mm) per month; knowing the baseline rate helps a tech recognize that faster growth in summer and slower growth with age or poor health are normal variations.
Source: Milady Standard Nail Technology, Nail Growth (average ~1/10 inch per month)Report a problem with this question
7. Nails are composed mainly of what fibrous protein?
- A.Melanin
- B.Keratin✓ Answer
- C.Elastin
- D.Collagen
The nail plate is made of tightly packed, hardened keratin, the same fibrous protein found in skin and hair; because it is non-living keratin, the visible plate itself has no nerves and filing it causes no pain.
Source: Milady Standard Nail Technology, Nail Structure (nail plate = keratin)Report a problem with this question
8. Which layer of the skin is the outermost layer that a nail tech contacts during a service?
- A.Papillary layer
- B.Subcutaneous layer
- C.Epidermis✓ Answer
- D.Dermis
The epidermis is the outermost skin layer and has no blood vessels; the dermis beneath it contains the blood supply and nerves, which is why breaking through into the dermis (e.g., cutting too deep) can bleed and invite infection.
Source: Milady Standard, Skin Structure (Epidermis is outermost, avascular)Report a problem with this question
9. A client has onychomycosis (a fungal infection of the nail). What should the nail technician do?
- A.Apply extra polish to cover it
- B.Soak the nail in disinfectant and proceed
- C.File off the infected area and continue
- D.Refer the client to a physician and not perform the service✓ Answer
Onychomycosis is a fungal infection, which is a medical condition; a nail tech is not licensed to diagnose or treat infections and must refer the client to a physician to avoid spreading the infection to others.
Source: NIC Content Outline: Diseases & Disorders (refer infections); Milady, Nail Disorders (onychomycosis = refer)Report a problem with this question
10. Paronychia, an inflammation with redness, swelling, and often pus around the nail fold, should be handled how by a nail tech?
- A.Drain the pus, then apply gel
- B.Massage the area to reduce swelling
- C.Service it normally with extra oil
- D.Do not service; refer to a physician because it is an infection✓ Answer
Redness, swelling, and pus are signs of an active bacterial infection; a nail tech must not service infected skin and should refer the client to a physician, because working on it risks spreading the infection and worsening it.
Source: Milady, Nail Disorders (paronychia = infection, do not service/refer)Report a problem with this question
11. Onycholysis is the separation of the nail plate from the nail bed. When can a nail tech generally still service a client with this condition?
- A.Whenever the client requests it, regardless of symptoms
- B.When there is no sign of infection, redness, swelling, or pus✓ Answer
- C.Only if it is on the toenails
- D.Only if the client signs a waiver
Onycholysis alone is a disorder, not an active infection, so a tech may generally service the nail if there are no signs of infection (redness, swelling, pus, or broken skin); any sign of infection changes it to a refer-to-physician situation.
Source: Milady, Nail Disorders (onycholysis = disorder; service only if no infection)Report a problem with this question
12. A hangnail (agnail) is best described as what, and how should a tech address it?
- A.Split skin around the nail; trim the loose skin and condition it, if no infection is present✓ Answer
- B.A separation of the plate from the bed; do not service
- C.A fungal infection; refer to a physician immediately
- D.A bruise under the nail; leave it to grow out
A hangnail is simply split or torn skin around the nail, a common condition a tech may service; the loose skin can be carefully trimmed and the area conditioned with oil, but only if there is no redness, swelling, or infection.
Source: Milady, Nail Disorders (hangnail/agnail = serviceable if no infection)Report a problem with this question
13. A dark purplish spot beneath the nail plate caused by trauma that traps blood is called a bruised nail. How should a tech proceed?
- A.Service gently if there is no open wound or infection, as it is a disorder, not a contagious disease✓ Answer
- B.File through the plate to release the blood
- C.Refer immediately because it is always contagious
- D.Apply artificial nails to hide it and add pressure
A bruised nail is blood trapped from injury, a non-contagious disorder rather than an infection, so a tech may service it gently as long as there is no open wound, swelling, or infection; the discoloration simply grows out with the nail.
Source: Milady, Nail Disorders (bruised nail = disorder; serviceable if no open wound/infection)Report a problem with this question
14. Which part of the nail unit produces the new cells that form and grow the nail plate?
- A.The nail matrix✓ Answer
- B.The free edge
- C.The hyponychium
- D.The nail bed
The matrix is the only part of the nail unit where cell division (mitosis) occurs; as new keratinized cells are produced there, they are pushed forward and harden into the nail plate, so damage to the matrix can permanently deform nail growth. The nail bed only guides the plate as it grows, and the hyponychium and free edge are at the distal end.
Source: Milady Standard Nail Technology, Ch. Nail Structure & Growth; NIC Nail Technician National Theory outline: Nail Anatomy/Physiology (matrix as site of nail formation)Report a problem with this question
15. The natural nail plate is composed primarily of which protein?
- A.Collagen
- B.Keratin✓ Answer
- C.Melanin
- D.Elastin
The nail plate is made of tightly packed, keratinized dead cells; keratin is a tough fibrous protein whose disulfide cross-links give the plate its hardness and flexibility. Collagen and elastin are found in the dermis, and melanin is a pigment, not a structural nail protein.
Source: Milady Standard Nail Technology, Ch. Nail Structure & Growth; NIC Nail Technician National Theory outline: Nail composition (keratin)Report a problem with this question
16. What is the function of the hyponychium?
- A.It produces the cells that make the nail grow
- B.It supplies the pink color seen through the nail plate
- C.It anchors the nail plate to the finger bone
- D.It forms a protective seal under the free edge that keeps pathogens from reaching the nail bed✓ Answer
The hyponychium is the thickened epithelium under the free edge where the plate separates from the fingertip; it forms a watertight seal that blocks bacteria and fungi from entering the nail bed, which is why over-cleaning or lifting it invites infection. Cell production is the matrix's job, and the pink color comes from blood vessels in the nail bed.
Source: Milady Standard Nail Technology, Ch. Nail Structure & Growth; NIC Nail Technician National Theory outline: Nail anatomy (hyponychium as protective seal)Report a problem with this question
Practice questions based on the NIC national nail technology content outline. Not affiliated with NIC, PSI, or any state board. Your state may add state-law content — check your board's requirements. About NIC exams →