22 Hair Care Services Practice Questions & Answers

1. 1. Which reference point on the head marks the widest area, where the head begins to curve?

   • A.The apex, the highest point found on the curved top of the head
   • B.The occipital bone, the ridge that is felt at the back of the head
   • C.The parietal ridge, where a comb held flat rests on the skull✓ Answer
   • D.The nape, the section lying below the occipital bone at the hairline

   The parietal ridge is the widest part of the head, the line where the surface stops being flat and starts to curve. It divides the sides from the top, which is why the same length cut above and below it falls in two different ways.

   Source: Milady Standard Cosmetology, haircutting chapter: reference points of the headReport a problem with this question

2. 2. How do vertical partings affect a haircut compared with horizontal partings?

   • A.They remove weight and support layering, while horizontal partings build weight✓ Answer
   • B.They build weight at the perimeter, while horizontal partings create layering
   • C.They keep the length identical, while horizontal partings raise the elevation
   • D.They create diagonal movement, while horizontal partings shorten the interior

   Vertical partings lift the hair away from the curve of the head as it is cut, so weight is released and graduation or layering appears. Horizontal partings keep the hair closer to its natural fall and stack weight into the shape.

   Source: Milady Standard Cosmetology, haircutting chapter: sectioning and parting patternsReport a problem with this question

3. 3. At which elevation is every strand cut to the same length from the scalp, producing uniform layers?

   • A.90 degrees, which follows the curve of the head and removes bulk evenly✓ Answer
   • B.0 degrees, which leaves a solid one-length form with weight at the perimeter
   • C.180 degrees, which over-directs to the top and leaves the longest ends below
   • D.45 degrees, which stacks a graduated form and builds a visible weight line

   At 90 degrees the hair is held straight out from the curve of the head, so every strand ends up the same distance from the scalp and no weight collects anywhere. That is the uniform-layered form; 0 degrees gives a solid line and 45 degrees graduates.

   Source: Milady Standard Cosmetology, haircutting chapter: elevation and the four basic formsReport a problem with this question

4. 4. Which guide is used when the finished cut must increase in length toward the back?

   • A.A stationary guide, taken at the nape and cut without any over-direction at all
   • B.A traveling guide, cut at 45 degrees so the weight line drops to the perimeter
   • C.A stationary guide, with each section over-directed back to that one fixed point✓ Answer
   • D.A traveling guide, which advances section by section to hold one steady length

   A stationary guide stays in one place while every new section is combed away from its natural fall and over-directed back to it, so each section is cut progressively longer and the length increases. A traveling guide moves with the sections and keeps the length consistent.

   Source: Milady Standard Cosmetology, haircutting chapter: stationary versus traveling guidelinesReport a problem with this question

5. 5. A client's hair feels heavy and bulky, but the length is already exactly right. Which tool fits?

   • A.A straight razor, which tapers the ends and takes off length as it removes bulk
   • B.Clippers with a guard, which cut a uniform short length across the whole area
   • C.Standard cutting shears, which take a blunt line and shorten every strand cut
   • D.Texturizing shears, which thin the interior and reduce density without shortening✓ Answer

   Texturizing or thinning shears have one notched blade, so each closing cuts only part of the hair held in the strand. Density drops inside the shape while the perimeter length stays exactly where the client wants it.

   Source: Milady Standard Cosmetology, haircutting chapter: texturizing tools and removing bulkReport a problem with this question

6. 6. Why is a razor used on wet hair rather than on dry hair?

   • A.Wet hair is softened and swollen, so the blade slices cleanly instead of dragging✓ Answer
   • B.Wet hair is heavier, so the blade cuts a blunt perimeter line that will not taper
   • C.Wet hair shrinks as it dries, so the razor keeps every section at one exact length
   • D.Wet hair holds more pigment, so the razor seals the cuticle and prevents fading

   Water swells and softens the hair fibre, so the single edge of a razor slices through it cleanly and leaves the tapered, textured end the tool is chosen for. On dry hair the blade drags and tears the cuticle, which is both damaging and painful for the client.

   Source: Milady Standard Cosmetology, haircutting chapter: use of the razor on damp hairReport a problem with this question

7. 7. Which layer of the hair shaft holds the melanin and the side bonds that chemical services change?

   • A.The cuticle, the overlapping outer scales that guard the inside of the strand
   • B.The medulla, the soft central core that is often missing from very fine hair
   • C.The follicle, the tube-like pocket in the skin from which the strand grows
   • D.The cortex, the fibrous middle layer that carries most of the strand's weight✓ Answer

   The cortex is the fibrous middle layer that carries the melanin granules and the hair's side bonds, and it accounts for roughly ninety percent of the strand's weight. Every colour, perm and relaxer result is produced there, which is why products must first get past the cuticle.

   Source: Milady Standard Cosmetology, hair structure chapter: layers of the hair shaftReport a problem with this question

8. 8. A roller set drops within an hour on a humid day. Which explanation fits what happened?

   • A.Disulfide bonds were broken by the rollers and rebuilt as moisture entered the hair
   • B.Salt bonds were rearranged permanently, so the shape held only until the next wash
   • C.Hydrogen bonds formed by wetting and drying were broken again by moist air✓ Answer
   • D.Peptide bonds along the chain relaxed with heat and let the curl fall out of shape

   A wet set is a physical change: water breaks hydrogen bonds, the hair dries in the shape of the roller and the bonds reform there. Because water breaks those same bonds again, humidity in the air relaxes the set, while the disulfide bonds are never touched by water at all.

   Source: Milady Standard Cosmetology, hair structure chapter: hydrogen bonds and temporary stylingReport a problem with this question

9. 9. Which phase of the hair growth cycle is the active growing phase that lasts the longest?

   • A.Anagen, during which cells in the bulb divide and new keratin is added steadily✓ Answer
   • B.Catagen, the brief transition when the follicle shrinks and growth activity stops
   • C.Exogen, the point at which the loose club hair is released and a new cycle begins
   • D.Telogen, the resting phase that ends when the old strand is shed from the scalp

   Anagen is the active growth phase: matrix cells in the bulb divide and keratinise, adding new hair from below. It lasts for years on the scalp, far longer than the short transition of catagen or the resting telogen phase.

   Source: Milady Standard Cosmetology, hair structure chapter: anagen, catagen and telogenReport a problem with this question

10. 10. Wet hair barely stretches and snaps during the elasticity test. What should follow?

    • A.Wave the hair anyway, choosing a larger rod so the tension stays lower
    • B.Delay the chemical texture service and rebuild the hair with conditioners✓ Answer
    • C.Clarify the hair first, since product buildup is what limits the stretch
    • D.Relax the hair as planned, but cut the processing time by a few minutes

    Healthy wet hair stretches about half its length and returns; hair that will not stretch has damaged bonds in the cortex and cannot survive the swelling and softening of a perm or relaxer. Conditioning treatments first, and a later re-test, protect both the hair and the salon.

    Source: Milady Standard Cosmetology, hair and scalp analysis: the elasticity testReport a problem with this question

11. 11. Hair tests as highly porous through the mid-lengths and ends. How should the colour service change?

    • A.Add extra processing time on the ends so the pigment has longer to settle in
    • B.Apply to the ends first and leave them longest, as they process most slowly
    • C.Choose a stronger developer, because porous hair resists the dye entering it
    • D.Choose a gentler formula and watch the ends closely, since they grab colour fast✓ Answer

    Porosity is how open the cuticle is, so highly porous hair absorbs quickly and can take colour darker, cooler or more ashy than intended and then fade fast. A gentler formulation with close visual checks, and often a filler on the ends, keeps the result even.

    Source: Milady Standard Cosmetology, hair and scalp analysis: porosity and its effect on formulationReport a problem with this question

12. 12. In a permanent wave, what does the diameter of the rod determine?

    • A.The pH of the waving lotion, which must be matched to the rod that is chosen
    • B.The size of the curl formed, with smaller rods producing a tighter curl pattern✓ Answer
    • C.The processing time needed, since a wider rod always takes longer to develop
    • D.The firmness of the curl, which depends on the rod far more than on the lotion

    Rod diameter sets the diameter of the curl, so a small rod gives a tight curl and a large rod a wide one. How firm or strong that curl is comes from the strength of the waving lotion and the processing time, not from the rod.

    Source: Milady Standard Cosmetology, chemical texture services: rod size versus processing timeReport a problem with this question

13. 13. How does over-processed permanent-waved hair usually look and behave?

    • A.It looks curly and frizzy when wet but goes limp and straight once it dries✓ Answer
    • B.It holds a soft even wave when wet and keeps that same wave after drying
    • C.It is straight when wet and springs into a tight curl once it is fully dried
    • D.It looks dull when wet and turns noticeably darker at the ends after drying

    Over-processing breaks too many of the disulfide bonds for the neutralizer to rebuild, so the swollen wet hair still looks curly and frizzy but has lost the internal strength that holds a curl. As it dries the shape collapses and the hair reads as limp and straight.

    Source: Milady Standard Cosmetology, chemical texture services: signs of over-processingReport a problem with this question

14. 14. How does a true acid wave differ from an alkaline cold wave?

    • A.It needs added heat to process and gives a softer curl on fine or fragile hair✓ Answer
    • B.It processes faster at room temperature and lifts the natural colour one level
    • C.It skips the neutralizer, because the curl is set by the water rinse alone
    • D.It works at a higher pH and gives a firmer curl on coarse resistant hair

    A true acid wave uses glyceryl monothioglycolate at a pH below neutral, which acts slowly and needs an outside heat source, usually a hood dryer, to process. The result is a gentler, softer curl suited to fine, porous or fragile hair, while alkaline cold waves work at room temperature and curl more firmly.

    Source: Milady Standard Cosmetology, chemical texture services: acid-balanced versus alkaline permanent wavesReport a problem with this question

15. 15. After a hydroxide relaxer is rinsed out, what returns the hair to its normal pH?

    • A.A thio neutralizer left on the hair for the full five minutes before rinsing
    • B.A normalizing shampoo that is acid-balanced, often carrying a colour indicator✓ Answer
    • C.A leave-in moisturizer worked through the hair and then dried in with heat
    • D.A protein reconstructor applied to the mid-lengths and ends and then rinsed

    A hydroxide relaxer leaves the hair strongly alkaline, and its lanthionine bonds are already permanent, so nothing needs to be oxidised. Thorough rinsing followed by an acid-balanced neutralizing or normalizing shampoo drives the pH back down; a thio neutralizer belongs to perm and thio-relaxer chemistry and does nothing here.

    Source: Milady Standard Cosmetology, chemical texture services: neutralizing shampoo after hydroxide relaxersReport a problem with this question

16. 16. On a relaxer retouch, where is the relaxer placed?

    • A.On the ends first, because previously relaxed ends are the most resistant part
    • B.Over the whole strand, smoothing from scalp to ends so the texture stays even
    • C.On the new growth, stopping short of the hair that was relaxed at the last visit✓ Answer
    • D.On the new growth plus one inch of relaxed hair, to blend the line of demarcation

    Hair that has already been relaxed cannot be relaxed again, because its bonds have been permanently converted. Overlapping onto that hair double-processes it at the same point and is the single biggest cause of breakage, so the product goes on the new growth and stops there.

    Source: Milady Standard Cosmetology, chemical texture services: relaxer retouch applicationReport a problem with this question

17. 17. What does the alkalizing agent in a permanent haircolour do?

    • A.It binds small dye molecules to the cuticle so the colour coats the surface
    • B.It slows the peroxide down so the colour deposits without lifting any level
    • C.It raises the pH and swells the cuticle so tint and peroxide reach the cortex✓ Answer
    • D.It replaces the underlying pigment that lightening removes from the strand

    The alkalizing agent, usually ammonia or a substitute such as monoethanolamine, raises the pH so the cuticle swells and opens. That is what lets the dye precursors and the hydrogen peroxide travel into the cortex, where the colour molecules are formed and trapped.

    Source: Milady Standard Cosmetology, haircoloring chapter: alkalizing agents in oxidative colourReport a problem with this question

18. 18. Which developer is standard for a permanent colour that must cover grey and lift one to two levels?

    • A.20 volume, which lifts one to two levels while depositing the new pigment✓ Answer
    • B.10 volume, which deposits colour and lifts about one level on resistant grey
    • C.30 volume, which is the usual choice whenever grey coverage is the main goal
    • D.40 volume, which lifts fastest and is applied right at the scalp for grey

    Developer volume controls how many levels of lift the colour achieves, not how fast it works. Twenty volume gives one to two levels of lift together with deposit, which is exactly what a permanent tint needs to open resistant grey and leave pigment behind.

    Source: Milady Standard Cosmetology, haircoloring chapter: hydrogen peroxide developer volumesReport a problem with this question

19. 19. As dark hair is lightened, in what order is the underlying pigment exposed?

    • A.Orange, then red, then red-violet, then blue, and finally a soft ash grey
    • B.Yellow, then gold, then orange, then red, and finally a deep blue-black
    • C.Violet, then blue, then green, then orange, and finally a warm pale gold
    • D.Red, then red-orange, then orange, then gold, and finally pale yellow✓ Answer

    Lightening removes melanin in a fixed sequence, so warm tones surface from the deepest to the lightest: red, red-orange, orange, gold and finally pale yellow. Reading which stage the hair has reached is what tells the stylist when to stop and which toner to use.

    Source: Milady Standard Cosmetology, haircoloring chapter: contributing pigment revealed during lighteningReport a problem with this question

20. 20. Pre-lightened hair has come up a brassy orange. Which toner base cancels that unwanted tone?

    • A.A violet base, which sits directly opposite orange on the standard colour wheel
    • B.A red base, which sits directly opposite orange and cools the warmth down
    • C.A green base, which sits directly opposite orange and neutralises warm tones
    • D.A blue base, which sits directly opposite orange and neutralises that warmth✓ Answer

    Complementary colours sit opposite each other on the colour wheel and cancel each other when mixed. Orange is made of red and yellow, so the missing primary, blue, is the one that neutralises it; violet cancels yellow and green cancels red.

    Source: Milady Standard Cosmetology, haircoloring chapter: the law of colour and complementary neutralizationReport a problem with this question

21. 21. What separates a demi-permanent colour from a semi-permanent colour?

    • A.The demi washes out in about six shampoos while the semi lasts until it grows out
    • B.The demi lifts two levels of natural pigment while the semi only deposits it
    • C.The demi is mixed with a low-volume developer while the semi needs none at all✓ Answer
    • D.The demi coats the cuticle only while the semi enters the cortex and stays there

    A demi-permanent is an oxidative colour mixed with a low-volume developer, so its pigment is formed inside the hair and lasts through many shampoos, but it deposits only and cannot lift. A semi-permanent uses no developer at all and fades out after a handful of shampoos.

    Source: Milady Standard Cosmetology, haircoloring chapter: categories of haircolourReport a problem with this question

22. 22. In a virgin lightener application, where does the product go first?

    • A.On the whole head at once, so that every zone of the hair lifts together
    • B.On the porous ends first, because they resist lightening more than the mids
    • C.At the scalp first, since the body heat found there speeds up the lift
    • D.At a quarter to a half inch off the scalp, leaving the scalp area for last✓ Answer

    Body heat makes the scalp area process noticeably faster, so virgin lightener starts a quarter to a half inch away from the scalp and works down the strand. The scalp area and the porous ends are applied last so that all three zones finish lifting at the same time.

    Source: Milady Standard Cosmetology, haircoloring chapter: virgin lightener application sequenceReport 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 →