22 Hair Care Services Practice Questions & Answers

1. 1. During a haircut, which reference point on the head is the parietal ridge?

   • A.The hair growing at the very bottom of the neck
   • B.The widest area of the head, at or slightly above the temples✓ Answer
   • C.The highest point on the top of the head
   • D.The occipital bone at the base of the skull

   The parietal ridge — also called the crest or hatline — is the widest part of the head, where the skull begins to curve away from the top. It matters because it divides the interior of the cut from the exterior and therefore controls where weight builds; the highest point is the apex, and the nape is the hair at the bottom of the neck.

   Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircutting: reference points of the head; NIC Cosmetology Theory CIB II.D.1Report a problem with this question

2. 2. A stylist cuts the back and nape sections at 45 degrees elevation using a traveling guide. What form does this create?

   • A.Uniform layers of equal length over the entire head
   • B.A blunt, one-length solid form
   • C.Graduation — a stacked, wedge-shaped buildup of weight✓ Answer
   • D.Long layers that are shortest at the top and longest at the perimeter

   Elevating below 90 degrees stacks each cut length slightly over the one beneath it, so 45 degrees produces graduation — a wedge or stacked shape in which the ends appear closer together and weight builds along the graduated line. 0 degrees gives a solid form, 90 degrees gives uniform layers, and 180 degrees gives long layers.

   Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircutting: elevation and the graduated cut; NIC CIB II.D.1Report a problem with this question

3. 3. Cutting with diagonal-forward partings around the face most typically produces which effect?

   • A.A stacked wedge with concentrated weight at the nape
   • B.Equal length throughout the interior of the cut
   • C.A length increase toward the face, creating a face-framing, beveled edge✓ Answer
   • D.Maximum bulk removal close to the scalp

   Diagonal-forward partings angle toward the face, so each successive strand travels farther to reach the guide and is left longer at the front; this builds a length increase and a soft beveled, face-framing edge. Diagonal-back partings do the opposite and create the stacked wedge effect.

   Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircutting: sectioning and parting lines; NIC CIB II.D.1Report a problem with this question

4. 4. In haircutting, 'overdirection' is best defined as:

   • A.Combing hair away from its natural falling position toward a guideline, creating a length increase✓ Answer
   • B.Holding every subsection at exactly 90 degrees from the head
   • C.Cutting with the shears held vertically instead of horizontally
   • D.Applying more tension than the hair can safely withstand

   Overdirection means combing the hair away from where it naturally falls and pulling it toward a guideline instead of straight out from the head. Because the overdirected hair must travel farther to reach the guide, it is cut longer, which is how a stylist deliberately builds a length increase or extra weight in a design.

   Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircutting: overdirection; NIC CIB II.D.1Report a problem with this question

5. 5. A client with very thick hair wants the bulk reduced but the overall length kept exactly the same. Which approach accomplishes this?

   • A.Clipper-over-comb through the nape and sides
   • B.Re-cutting the whole head at 0 degrees elevation
   • C.Blunt (club) cutting the entire perimeter a second time
   • D.Using thinning (texturizing) shears within the interior of each section✓ Answer

   Thinning or texturizing shears have notched blades that cut only some of the strands in a subsection, so bulk is removed from the interior while the perimeter length line is left untouched. Blunt cutting and clipper-over-comb both shorten hair, so neither preserves the existing length.

   Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircutting: texturizing with thinning shears; NIC CIB II.B / II.D.1Report a problem with this question

6. 6. Why must a straight razor be used only on wet hair when cutting?

   • A.Water on the hair disinfects the razor blade during the cut
   • B.Wet hair is stronger than dry hair and resists the blade better
   • C.A razor cannot physically cut hair that has been wetted
   • D.Dry hair drags against the blade, causing client discomfort and damaged, split ends✓ Answer

   A razor slices along the strand rather than cutting straight through it, and dry hair offers too much friction: the blade pulls the hair, which hurts the client and shreds the cuticle into split, frayed ends. Water lubricates the strand so the blade glides and produces the soft tapered end the razor is used for. Note that wet hair is actually weaker, not stronger, than dry hair.

   Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircutting: razor cutting requires wet hair; NIC CIB II.BReport a problem with this question

7. 7. A client's roller set collapses within minutes of walking outside on a humid day. Which bonds explain this?

   • A.Hydrogen bonds, which are broken by water and heat and re-form as the hair dries✓ Answer
   • B.Lanthionine bonds formed by a hydroxide relaxer
   • C.Disulfide bonds, which are broken only by chemical reduction
   • D.Peptide (end) bonds, which join amino acids into polypeptide chains

   A wet set is a physical, temporary change: water breaks the weak hydrogen side bonds, the hair is molded on rollers, and the bonds re-form in the new shape as it dries. Because moisture in the air breaks those same bonds again, humidity makes the set revert. Only a chemical service that alters disulfide bonds gives a lasting change.

   Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Hair structure: side bonds; Wet styling / hydrogen bonds; NIC CIB I.C / II.D.2Report a problem with this question

8. 8. Which layer of the hair contains the melanin and the side bonds, and is where perms, relaxers, and permanent color do their work?

   • A.The cuticle
   • B.The cortex✓ Answer
   • C.The dermal papilla
   • D.The medulla

   The cortex makes up roughly 90 percent of the hair's total weight and holds the melanin pigment and the disulfide, hydrogen, and salt bonds, so every permanent chemical change happens there. The cuticle is only the protective outer scale layer that must be opened for products to reach the cortex, the medulla has no role in salon services, and the papilla sits in the follicle, not the strand.

   Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Hair structure: cuticle, cortex, medulla; NIC CIB I.CReport a problem with this question

9. 9. Which statement about the hair growth cycle is correct?

   • A.Anagen is the active growing phase and the longest, lasting about two to six years✓ Answer
   • B.Catagen is the longest phase and the one in which new hair is produced
   • C.Telogen is the active growing phase and lasts two to six years
   • D.Catagen is the resting phase during which the hair is shed

   Anagen is the growth phase, when cells in the follicle divide and new hair is produced; it lasts roughly two to six years and accounts for the large majority of scalp hairs at any moment. Catagen is a brief transition phase and is the shortest, while telogen is the resting phase that ends in shedding.

   Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Hair growth cycle: anagen, catagen, telogen; NIC CIB I.CReport a problem with this question

10. 10. A wet strand of a client's hair stretches only slightly and snaps rather than returning to its original length. She has booked a permanent wave. What is the correct action?

    • A.Proceed with a hydroxide relaxer instead, since it is gentler
    • B.Proceed, but choose the strongest alkaline waving solution to guarantee a firm curl
    • C.Postpone the chemical service and recommend reconditioning treatments first✓ Answer
    • D.Proceed but cut the processing time in half

    Healthy hair stretches about 50 percent of its length when wet and springs back; a strand that barely stretches and breaks has poor elasticity, meaning the cortex bonds are already weakened. A perm deliberately breaks more disulfide bonds, so performing it on low-elasticity hair invites breakage. The service must be postponed until reconditioning restores strength.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Hair analysis: elasticity; Chemical texture contraindications; NIC CIB II.AReport a problem with this question

11. 11. A client with badly faded, highly porous mid-lengths and ends wants to go back to her natural level 5 brown. What should be used before the color so the porous areas do not grab too dark or too ashy?

    • A.An alkaline clarifying shampoo left on for 20 minutes
    • B.A conditioning or color filler to equalize porosity✓ Answer
    • C.Powder lightener applied to the porous ends
    • D.A 40-volume developer mixed into the formula

    Uneven porosity makes color absorb at different rates along the strand, so the most porous areas darken fastest and pull cool or muddy. A filler is applied first to equalize porosity and, in the case of a color filler, to replace the missing warm underlying pigment needed to support a darker deposit. Adding lightener or a high-volume developer would damage the ends further.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircoloring: fillers and porosity equalization; NIC CIB II.C / II.E.1Report a problem with this question

12. 12. In a permanent wave, what determines the SIZE of the finished curl?

    • A.The volume of the neutralizer used
    • B.The strength and pH of the waving solution
    • C.The diameter of the perm rod✓ Answer
    • D.The number of end papers wrapped on each strand

    The rod's diameter is the mold the softened hair is shaped around, so a smaller rod gives a tighter curl and a larger rod a looser one. The strength of the waving solution controls the degree of the chemical change — how completely the disulfide bonds are broken and therefore how firm the curl is — not its size. End papers only control the ends and prevent fishhooks.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Chemical Texture Services: rod size and curl size; NIC CIB II.E.3Report a problem with this question

13. 13. A permanent wave was left on far past the point at which the test curl showed a firm S. The hair is now frizzy and severely damaged. What is the correct assessment?

    • A.Apply a hydroxide relaxer to remove the excess curl
    • B.Apply a second neutralizer to re-form the missing bonds
    • C.The hair is over-processed: too many disulfide bonds were broken and the damage cannot be reversed✓ Answer
    • D.Re-perm with a milder acid wave to restore an even curl pattern

    Over-processing breaks more disulfide bonds than the neutralizer can rebuild, so the cortex is permanently weakened; no additional neutralizer, perm, or relaxer can restore bonds that no longer exist. The only remedy is reconditioning treatments and gradually cutting off the damaged hair — which is why the test curl, not the clock alone, governs processing.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Chemical Texture Services: test curl and over-processing; NIC CIB II.E.3Report a problem with this question

14. 14. Compared with an alkaline (cold) wave, a TRUE acid wave:

    • A.Uses glyceryl monothioglycolate at a pH of about 4.5 to 7.0 and normally requires added heat✓ Answer
    • B.Has a higher pH and processes faster at room temperature
    • C.Requires no neutralizing step at all
    • D.Uses ammonium thioglycolate at a pH of about 9.6

    True acid waves rely on glyceryl monothioglycolate at a pH of roughly 4.5 to 7.0, which swells the hair far less than an alkaline wave. Because the reaction is slower at that pH, they are activated with heat from a hood dryer, and the gentler action makes them the appropriate choice for fine, porous, or tinted hair. Every perm, acid or alkaline, still requires oxidation neutralization.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Chemical Texture Services: acid vs. alkaline waves; NIC CIB II.E.3Report a problem with this question

15. 15. How is the chemical action of a sodium hydroxide relaxer stopped?

    • A.With hydrogen peroxide, which oxidizes the hair and re-forms the broken bonds
    • B.By air-drying the hair, which allows it to return to its natural pH on its own
    • C.With sodium bromate applied at the shampoo bowl for five minutes
    • D.By rinsing thoroughly and then shampooing with an acid-balanced neutralizing shampoo that lowers the pH✓ Answer

    A hydroxide relaxer works at a pH of about 11.5 to 14 and permanently converts disulfide bonds to lanthionine bonds, so there is nothing left to re-oxidize. The service is stopped by removing the alkali: rinse thoroughly, then use an acid-balanced neutralizing (normalizing) shampoo to bring the pH back down. Oxidizers such as peroxide or sodium bromate neutralize thio services, not hydroxide ones.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Chemical Texture Services: hydroxide relaxers and neutralizing shampoo; NIC CIB II.E.2Report a problem with this question

16. 16. A client returns for a relaxer retouch with about one-half inch of new growth. The relaxer should be applied:

    • A.From scalp to ends so the whole head processes evenly
    • B.To the ends first, because previously relaxed ends are the most resistant
    • C.To the new growth, then combed through the mid-lengths for the final five minutes
    • D.To the new growth only, taking care not to overlap onto previously relaxed hair✓ Answer

    Previously relaxed hair has already had its disulfide bonds converted to lanthionine bonds and cannot be relaxed again. Overlapping a retouch re-exposes that hair to a strong alkali, which produces a visible line of demarcation and severe breakage at that point. Only the untreated new growth should receive product.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Chemical Texture Services: relaxer retouch and overlapping; NIC CIB II.E.2Report a problem with this question

17. 17. In a permanent haircolor formula, which ingredient swells the hair and lifts the cuticle so the dye can reach the cortex?

    • A.The hydrogen peroxide developer
    • B.The alkalizing agent, such as ammonia✓ Answer
    • C.The conditioning agents in the cream base
    • D.The aniline-derivative dye precursors

    It is the alkalizing agent — ammonia in a permanent tint, or an alkanolamine such as MEA in an ammonia-free demi — that raises the pH, swells the strand, and opens the cuticle. Hydrogen peroxide is the oxidizer: it develops the dye precursors into large color molecules and diffuses melanin, but it does not open the cuticle on its own. This is one of the most commonly reversed facts on the exam.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircoloring: components of permanent color (alkalizing agent vs. developer); NIC CIB II.E.1Report a problem with this question

18. 18. After lifting a client's level 4 hair, the exposed pigment is a strong orange. Which toner base will best neutralize it?

    • A.A red base
    • B.A blue (ash) base✓ Answer
    • C.A violet base
    • D.A gold base

    Complementary colors sit opposite each other on the color wheel and cancel each other when combined. Orange is a secondary color made of red and yellow, and its complement is the remaining primary, blue — so a blue or ash base neutralizes orange. Violet cancels yellow and green cancels red, which is why those bases would not correct this result.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircoloring: the law of color and complementary neutralization; NIC CIB II.E.1Report a problem with this question

19. 19. As dark natural hair is progressively lightened, in what order is the underlying (contributing) pigment exposed?

    • A.Ash, then neutral, then gold, then copper
    • B.Red, then red-orange, then orange, then orange-yellow, then yellow, then pale yellow✓ Answer
    • C.Pale yellow, then yellow, then orange, then red
    • D.Violet, then blue, then green, then yellow

    Lightening dissolves the darker, larger melanin pigments first, so the warm pigment left behind moves from red at the darkest levels through orange to yellow and finally pale yellow at the lightest. Knowing which stage the hair is at tells the colorist which complementary base is needed to tone it, and stopping too early leaves brassy orange that a blonde formula alone cannot cover.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircoloring: contributing pigment and stages of decolorization; NIC CIB II.E.1Report a problem with this question

20. 20. Which statement correctly distinguishes semi-permanent from demi-permanent haircolor?

    • A.Semi-permanent is used with no developer, while demi-permanent is mixed with a low-volume developer but contains no ammonia✓ Answer
    • B.Semi-permanent is mixed with a 20-volume developer, while demi-permanent uses none
    • C.Both contain ammonia and both can lift two levels
    • D.Demi-permanent washes out in a single shampoo, while semi-permanent is truly permanent

    Semi-permanent color is used straight from the bottle with no developer; its small molecules partially enter the cortex and deposit only, fading over several shampoos. Demi-permanent is an oxidative deposit-only color mixed with a low-volume developer and an alkanolamine instead of ammonia, which makes it longer lasting and better for gray blending and glossing — but neither category can lighten natural pigment.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircoloring: categories of haircolor (semi vs. demi); NIC CIB II.E.1Report a problem with this question

21. 21. A 20-volume developer is best described as:

    • A.3% hydrogen peroxide, used for deposit only with no lift
    • B.9% hydrogen peroxide, providing three to four levels of lift
    • C.6% hydrogen peroxide, the standard strength for one to two levels of lift and full gray coverage✓ Answer
    • D.12% hydrogen peroxide, the standard choice for on-the-scalp lightener applications

    Volume measures how much oxygen the peroxide releases, and each 10 volumes equals about 3 percent concentration: 10 vol = 3%, 20 vol = 6%, 30 vol = 9%, 40 vol = 12%. Twenty volume is the workhorse for permanent single-process color because it lifts one to two levels while releasing enough oxygen for complete gray coverage. Forty volume is never used for on-the-scalp lightening because of the burn risk.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircoloring: developer volumes and percentages; NIC CIB II.E.1Report a problem with this question

22. 22. When applying lightener to virgin hair, what is the correct application sequence?

    • A.Apply to the ends first and the mid-shaft last, leaving the scalp area untouched entirely
    • B.Begin one-half to one inch away from the scalp and work through the mid-shaft first, applying the scalp area and the porous ends last✓ Answer
    • C.Start at the scalp and work down to the ends, since the scalp is the most resistant area
    • D.Apply everywhere at once and let body heat even out the result

    Body heat radiating from the scalp accelerates the chemical reaction, and the porous ends already process quickly, so both would over-lighten if treated first. Starting the application one-half to one inch off the scalp lets the resistant mid-shaft catch up, and adding the scalp area and ends last brings the whole strand to an even level without hot roots or a line of demarcation.

    Source: Milady Standard Cosmetology and Foundations, 14th ed. (2023) — Haircoloring: virgin lightener application; NIC CIB II.E.1Report a problem with this question

Practice questions based on the NIC national cosmetology theory content outline and standard salon science. Not affiliated with NIC, PSI, or any state board. Your state may add state-law and practical content — check your board's requirements before testing. About NIC exams →