I85PREP
⌘ K
NJ Cosmetology study materials
NJ Cosmetology study resources

NJ Cosmetology practice questions

One question at a time. Build your NJ Cosmetology understanding.

First 50 of 200 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1Haircutting and Hair Styling

Which cutting implement is designed to create a solid blunt line by cutting hair between two blades that meet along a straight edge?

  1. Thinning shears
  2. Straight razor
  3. Shears Correct answer.
  4. Electric clippers

Explanation

Haircutting shears have two straight blades that close completely, removing every strand caught between them so the cut edge is solid and blunt. Other tools remove only part of the hair or cut at an angle, which produces texture rather than a solid line.

Question 2Haircutting and Hair Styling

Why is the hair divided into sections before a haircut begins?

  1. To remove tangles from the ends before cutting
  2. To shorten the drying time after the shampoo
  3. To control the hair and allow even, consistent cutting Correct answer.
  4. To encourage the natural wave pattern to develop

Explanation

Sectioning divides the head into uniform, manageable areas so each subsection can be cut with the same guide and the same elevation, which keeps the finished shape balanced. It also lets the stylist keep track of what has already been cut.

Question 3Haircutting and Hair Styling

Hair cut at 0 degrees elevation with a stationary guide produces which result?

  1. Heavily texturized ends
  2. A graduated stack along the perimeter
  3. A blunt, one-length line Correct answer.
  4. Uniformly layered ends throughout the crown

Explanation

At 0 degrees the hair is held at its natural fall, flat against the head, so every strand is cut at the same level and the result is a one-length, blunt perimeter. Any layering or stacking requires lifting the hair above 0 degrees.

Question 4Haircutting and Hair Styling

What is the primary purpose of a concentrator nozzle on a blow dryer?

  1. Speeding drying across the entire head at once
  2. Adding moisture to the hair shaft
  3. Cooling the air before it reaches the hair
  4. Directing airflow to a specific section of hair Correct answer.

Explanation

A concentrator narrows and focuses the airflow so the stylist can aim heat at one subsection while smoothing it with a brush. Without the nozzle, air scatters and disturbs the hair that has already been styled.

Question 5Haircutting and Hair Styling

What is a recommended way to check whether a curling iron is too hot before using it on a client?

  1. Touch the barrel briefly with a wet fingertip
  2. Hold the barrel against the client's neck for a few seconds
  3. Press the barrel onto the client's hair for thirty seconds
  4. Press a piece of tissue paper against the barrel and look for scorching Correct answer.

Explanation

Tissue paper scorches at a lower temperature than hair does, so browning or scorching gives an early warning that the iron is running too hot. Many stylists also test the iron on a small strand of their own hair before applying it to the client.

Question 6Haircutting and Hair Styling

The base of a pin curl is shaped as which form?

  1. A rectangle
  2. A triangle
  3. A square
  4. A circle Correct answer.

Explanation

A pin curl is carved on a circular base, and the diameter of that circle determines the size of the finished curl. Clean partings and even strand tension are what keep the circle well defined.

Question 7Haircutting and Hair Styling

Which braid is made by adding new hair from the sides to the outer strands as the braid travels down the head?

  1. A French braid Correct answer.
  2. A fishtail braid
  3. A simple three-strand braid
  4. A rope braid

Explanation

In a French braid, small sections are picked up along each side and woven into the outer strands so the braid stays attached to the scalp. A simple three-strand braid uses only the original strands and hangs free.

Question 8Haircutting and Hair Styling

Which tool is designed specifically for cutting hair close to the scalp and outlining the ears and neckline?

  1. Straight razor
  2. Texturizing shears
  3. Round brush
  4. Edger Correct answer.

Explanation

An edger, or trimmer, has fine teeth that allow close cutting and sharp outlining around the ears and neckline. It is a detail tool rather than a bulk-removal or styling tool.

Question 9Haircutting and Hair Styling

When each new subsection is cut to the guide established by the subsection just before it, the technique is called what?

  1. Stationary guide
  2. Traveling guide Correct answer.
  3. Overdirection
  4. Cross-checking

Explanation

A traveling, or moving, guide means the guide moves across the head as each subsection becomes the reference for the next one. This is how a stylist carries a line consistently around the head.

Question 10Haircutting and Hair Styling

What does overdirection accomplish when it is used at the perimeter of a haircut?

  1. It increases the natural elasticity of the hair
  2. It removes excess bulk from the interior of the cut
  3. It makes the hair dry faster after the cut
  4. It shifts the weight line and builds length toward the opposing side Correct answer.

Explanation

Overdirection moves hair away from its natural fall before the cut, so the cut edge follows a shifted line and the weight travels toward the opposite side. It is commonly used at the front hairline to build length toward the face.

Question 11Haircutting and Hair Styling

Which description best fits a graduated, or stacked, haircut?

  1. The perimeter is cut first and the interior is left completely unlayered
  2. Lengths increase progressively from shorter interior sections to a longer perimeter Correct answer.
  3. The hair is cut entirely with a razor to soften the ends
  4. All hair is cut at a single elevation of 90 degrees for uniform layers

Explanation

Graduation is built by raising elevation gradually, so the shortest lengths sit at the interior and the longest remain at the perimeter, creating a stacked or wedge shape. The effect is a shape that builds weight toward the bottom edge.

Question 12Haircutting and Hair Styling

Why does a stylist cross-check a haircut after the main cutting is finished?

  1. To decide which styling product to use
  2. To remove the guide lines before styling
  3. To confirm balance and evenness from a different angle Correct answer.
  4. To add moisture back into the ends

Explanation

Cross-checking means re-examining the hair at an angle different from the original cutting lines, which reveals imbalance the first pass may have hidden. It is a quality-control step used before the cut is finished and styled.

Question 13Haircutting and Hair Styling

Which result is characteristic of razor cutting?

  1. A uniform length that cannot be graduated
  2. A tighter curl pattern in the finished style
  3. A hard, solid line with no visible texture
  4. Soft, tapered ends with a slightly diffused edge Correct answer.

Explanation

A razor slices hair at an angle rather than cutting it square, so the ends taper and the edge looks softened. This is why razors are often used for shag and soft layered shapes.

Question 14Haircutting and Hair Styling

How do thinning shears differ from standard haircutting shears?

  1. They cut the hair at a 90-degree angle to shorten the length
  2. One blade is notched, so only a percentage of the hair is removed Correct answer.
  3. They are used only on dry hair to create a blunt perimeter
  4. Both blades are serrated and cut every strand in the subsection

Explanation

Thinning shears pair one straight blade with a notched or toothed blade, so each close cuts only some of the strands. This reduces bulk and weight without changing the overall length line.

Question 15Haircutting and Hair Styling

How large should each subsection be when blow-drying with a round brush?

  1. Large enough to cover two brush barrels
  2. As wide as the entire nape section
  3. Half the length of the longest hair strand
  4. No larger than the diameter of the brush barrel Correct answer.

Explanation

The subsection should be no wider than the barrel so the brush can grip every strand and apply even tension. Oversized subsections sit outside the barrel, dry unevenly, and lose smoothness.

Question 16Haircutting and Hair Styling

Which hair condition calls for the lowest heat setting on a flat iron?

  1. Thick, coarse, unprocessed hair
  2. Hair with a strong, resistant wave pattern
  3. Fine hair that has been lightened or relaxed Correct answer.
  4. Short, dense hair around the nape

Explanation

Fine and chemically treated hair has less structural strength and is damaged more easily by heat, so it should be pressed at a lower temperature with a thermal protectant. Coarser, resistant hair generally tolerates more heat.

Question 17Haircutting and Hair Styling

How should a subsection be sized to produce a tighter, more defined curl with a curling iron?

  1. Wider than the barrel and wound loosely
  2. Wider at the scalp and narrow at the ends
  3. The same width as the barrel but wound from the ends only
  4. Narrower than the barrel, wound with even tension Correct answer.

Explanation

A subsection narrower than the barrel fits inside the curl, so it can be wrapped tightly and takes on a smaller, more defined shape. Widths equal to or wider than the barrel sit on the outside and produce a looser bend.

Question 18Haircutting and Hair Styling

Velcro rollers are best suited to which situation?

  1. Setting a wet, chemically relaxed head of hair
  2. Creating hard, defined spiral curls
  3. Straightening resistant, coarse hair at the root
  4. Adding lift and smoothness to hair that is already dry Correct answer.

Explanation

Velcro rollers grip dry hair through their textured surface and add lift and polish to a finished blow-dry. Because they supply no heat, they cannot set wet hair on their own and can tangle damp strands.

Question 19Haircutting and Hair Styling

A finger wave is created by which process?

  1. Braiding damp hair and unrolling it once dry
  2. Winding wet hair around a rod and letting it dry
  3. Pressing dry hair flat with a hot iron and comb
  4. Alternating ridges and hollows with the comb and fingers in wet, gelled hair Correct answer.

Explanation

Finger waving manipulates wet hair treated with gel into a series of S-shaped ridges and hollows, with the fingers forming the ridge and the comb pushing the hollow. The pattern holds once the hair dries.

Question 20Haircutting and Hair Styling

What is the most important consideration when constructing an updo?

  1. Concealing every bobby pin with hair spray
  2. Balancing the shape and anchoring each section securely Correct answer.
  3. Building the entire style from a single anchor point
  4. Choosing the smallest possible number of hairpins

Explanation

An updo must be balanced in silhouette and every section must be anchored firmly enough to hold through the event. Good anchoring also distributes the weight so the style stays comfortable for the client.

Question 21Haircutting and Hair Styling

What shape results when hair is cut at 45-degree elevation against a stationary guide?

  1. A texturized interior with a softened perimeter edge
  2. A blunt one-length line with no visible layering at all
  3. A graduated, stacked line Correct answer.
  4. Uniform 90-degree layers of equal length throughout the head

Explanation

Elevation between 0 and 90 degrees builds graduation: each subsection is held up at 45 degrees, so lengths increase from the interior toward the perimeter. The result is a stacked or wedge-shaped weight line.

Question 22Haircutting and Hair Styling

A client has a strong cowlick at the front hairline. Which cutting approach best minimizes its appearance?

  1. Razor the cowlick down to the scalp for a smooth finish
  2. Overdirect the area to 90 degrees and cut it with the rest of the fringe
  3. Cut the area blunt and very short so the hair stands straight up
  4. Leave extra length in the area and cut with the growth pattern Correct answer.

Explanation

Hair at a cowlick grows in a different direction, so leaving additional length gives it the weight needed to lie with the rest of the fringe. Following the growth pattern avoids creating a gap or a spiky patch at the hairline.

Question 23Haircutting and Hair Styling

Why can cutting wet hair under strong tension produce an uneven finished length?

  1. Water raises the cuticle, which shortens each strand
  2. Wet hair is heavier, so it stretches permanently during the cut
  3. Stretched hair springs back shorter as it dries and relaxes Correct answer.
  4. Wet hair loses elasticity, so it cannot be cut accurately

Explanation

Wet hair stretches, so a strand held under tension is cut longer than its relaxed length and then draws up as it dries. Even, moderate tension rather than maximum tension keeps the final result predictable.

Question 24Haircutting and Hair Styling

When outlining the neckline with clippers, cutting upward against the direction of hair growth will do what?

  1. Leave the hair longer than cutting with the growth pattern
  2. Have no effect on the finished length of the outline
  3. Cut the hair closer to the skin than cutting with the growth pattern Correct answer.
  4. Push the finished hairline lower onto the neck

Explanation

Cutting against the grain lifts the hairs and brings the blade closer to the skin, producing a tighter, cleaner outline. Cutting with the grain leaves a softer, slightly longer edge.

Question 25Haircutting and Hair Styling

Which principle explains why a curl formed with a hot iron holds its shape once the hair cools?

  1. Heat permanently breaks the disulfide bonds in the cortex
  2. The hair shaft absorbs moisture from the air and hardens
  3. Heat and moisture temporarily break hydrogen bonds that re-form in the new shape as the hair cools Correct answer.
  4. The cuticle fuses to itself when pressed by the iron

Explanation

Thermal styling makes a temporary physical change: heat and moisture rearrange hydrogen bonds, and as the hair cools in its new position those bonds re-form and lock the curl in place. Water or heat can later reset them, which is why the curl is temporary.

Question 26Haircutting and Hair Styling

In haircutting, what does the term elevation describe?

  1. The amount of tension applied to the strand
  2. The direction in which the hair grows from the scalp
  3. The width of the subsection being cut
  4. The angle at which the hair is held away from the head Correct answer.

Explanation

Elevation, also called projection, is the angle at which a subsection is held away from the head before the cut. It controls how much length is removed from the interior and therefore determines the resulting shape and degree of layering.

Question 27Haircutting and Hair Styling

Which blow-dryer attachment narrows the airstream so it can be aimed precisely for a smooth finish?

  1. Concentrator nozzle Correct answer.
  2. Pik
  3. Comb attachment
  4. Diffuser

Explanation

A concentrator nozzle funnels the airflow into a narrow stream so it can be directed down the hair shaft section by section. This focused airflow is what allows a stylist to smooth the cuticle and control the shape of the finished style.

Question 28Haircutting and Hair Styling

Which product is worked through damp hair at the root area to build volume before blow-drying?

  1. Finishing spray
  2. Pomade
  3. Mousse Correct answer.
  4. Silicone serum

Explanation

Mousse is a light aerosol foam applied to damp hair that adds body and light hold, especially at the root area, so the blow-dryer can lift the hair. Heavier products such as pomade and serum are used in small amounts on dry hair for shine and control.

Question 29Haircutting and Hair Styling

What is the purpose of a diffuser when blow-drying curly hair?

  1. It increases airflow to speed up drying
  2. It adds moisture to the hair while drying
  3. It spreads the airflow so curls dry without being blown apart Correct answer.
  4. It straightens the curl pattern with concentrated heat

Explanation

A diffuser scatters the airstream over a broad area, which lowers the direct force on the hair so the curl pattern stays intact and frizz is reduced. It is not intended to straighten, moisturize, or rapidly blast the hair dry.

Question 30Haircutting and Hair Styling

A stylist wants to soften the blunt edge of a fringe without noticeably shortening it. Which technique is best?

  1. Point cutting into the ends Correct answer.
  2. Cutting the fringe at 90-degree elevation
  3. Clipper-over-comb along the hairline
  4. Recutting the line with zero elevation

Explanation

Point cutting removes small amounts of length at the ends using the tips of the shears, which breaks up a solid line while leaving most of the length intact. Re-cutting at zero elevation would keep the line blunt, while high elevation would layer the fringe away from its intended shape.

Question 31Haircutting and Hair Styling

On the same set of clippers, which guard leaves the most hair on the head?

  1. A #2 guard
  2. A #0 guard
  3. A #1 guard
  4. A #4 guard Correct answer.

Explanation

Guard numbers increase with the thickness of the spacer, so a higher number holds the blade farther from the scalp and leaves more length. A #4 guard therefore leaves more hair than a #2, #1, or #0 guard.

Question 32Haircutting and Hair Styling

Which braid is formed by twisting two strands around each other?

  1. Fishtail braid
  2. Three-strand braid
  3. Two-strand twist Correct answer.
  4. Cornrow

Explanation

A two-strand twist, sometimes called a rope braid, is made by winding two strands around each other in the same direction. Fishtail and three-strand braids both use alternating crossing sections, and a cornrow adds new hair along the scalp.

Question 33Haircutting and Hair Styling

A stylist cuts each new subsection to match the length of the subsection just cut beside it. Which type of guide is being used?

  1. Traveling guide Correct answer.
  2. Perimeter guide
  3. Stationary guide
  4. Cross-check guide

Explanation

A traveling, or moving, guide is taken from a section that has already been cut and moves along with the haircut as it progresses. A stationary guide stays in one place and each section is brought back to it, while a cross-check is a verification step done after cutting.

Question 34Haircutting and Hair Styling

Why is the blow-dryer aimed down the hair shaft from roots to ends when a smooth finish is wanted?

  1. It protects the hair from heat damage
  2. It removes styling product from the ends
  3. It lifts the cuticle so the hair appears fuller
  4. It lays the cuticle flat so light reflects evenly Correct answer.

Explanation

Directing airflow downward, in the same direction the cuticle scales lie, smooths those scales flat against the hair shaft. Flat scales reflect light evenly, which is what produces shine and a sleek surface.

Question 35Haircutting and Hair Styling

Why is the crown area backcombed before an updo is secured?

  1. To shorten the length of the front hairline
  2. To remove natural oils from the scalp
  3. To create a foundation that supports volume and pins Correct answer.
  4. To make the hair easier to comb out later

Explanation

Backcombing at the crown builds a dense cushion of hair that holds pins securely and gives the finished shape height and support. It is a structural step, not a way to shorten hair, cleanse the scalp, or improve combability.

Question 36Haircutting and Hair Styling

Which technique rounds the ends of a bob under during a round-brush blow-dry?

  1. Turning the brush under and holding the ends for a few seconds Correct answer.
  2. Releasing the ends without tension at the end of the stroke
  3. Directing cool air upward from underneath the section
  4. Rolling the brush upward while holding the section high

Explanation

Turning the brush under at the ends and letting the hair cool while still on the brush sets a curved under-bevel that holds its shape. Rolling upward instead produces a flip or added volume rather than a turned-under end.

Question 37Haircutting and Hair Styling

Why should hair be wrapped around a curling iron starting at the mid-lengths rather than at the ends?

  1. The mid-lengths absorb heat faster than the ends
  2. The ends would keep the iron from closing
  3. Wrapping from the ends can leave a crimped or fishhook end Correct answer.
  4. Wrapping from the ends makes the curl looser

Explanation

Winding the hair from the mid-lengths toward the scalp leaves the ends on the outside of the curl, so they blend into a smooth spiral. Clamping or wrapping the very ends first crushes them and creates a bent, fishhook-shaped tip.

Question 38Haircutting and Hair Styling

Why do stylists often cut curly hair in its dry, natural state rather than wet?

  1. Curly hair is too fragile to be cut when wet
  2. Curl shrinkage makes wet length appear longer than the finished dry length Correct answer.
  3. Wet curly hair cannot be combed into clean subsections
  4. Dry hair holds a guide line more firmly than wet hair

Explanation

Wet curly hair stretches out and reads as longer, but as it dries the curl draws up and the finished length looks shorter than planned. Cutting the hair dry lets the stylist see and follow the true finished shape and length.

Question 39Haircutting and Hair Styling

Which styling choice best balances a long, narrow face?

  1. Crown height with hair pulled back
  2. A long, straight blunt cut
  3. A center part worn flat to the head
  4. Side volume with a soft fringe Correct answer.

Explanation

Width at the sides adds horizontal balance and a fringe covers part of the forehead, both of which reduce the apparent length of the face. Height at the crown and long, straight shapes visually stretch the face even further.

Question 40Haircutting and Hair Styling

During a cross-check, a graduated bob is longer in the center of the nape than at the sides. What does this most likely indicate?

  1. The nape sections were cut with uneven tension or elevation Correct answer.
  2. The blow-dryer was aimed at the nape for too long
  3. The perimeter was established with a traveling guide
  4. The shears were held at an angle to the subsection

Explanation

Uneven results in a cross-check usually come from sections being cut with different tension or elevation, since either change alters how much length is removed. Measuring each section against the same guide with consistent tension prevents this imbalance.

Question 41Chemical Texture Services (perms and relaxers)

Which type of chemical bond is broken by the reducing agent in a permanent wave?

  1. Disulfide bonds Correct answer.
  2. Salt bonds
  3. Peptide bonds
  4. Hydrogen bonds

Explanation

The reducing agent in wave lotion breaks disulfide bonds, allowing the hair to be reshaped around the rod; the neutralizer then re-forms them in the new position. Hydrogen and salt bonds are rearranged by water and pH changes, not by the reducing agent.

Question 42Chemical Texture Services (perms and relaxers)

What is the primary action of a permanent wave neutralizer?

  1. It rebuilds disulfide bonds by oxidation Correct answer.
  2. It swells the hair shaft and lifts the cuticle
  3. It softens the hair for easier wrapping
  4. It raises the hair's pH to alkaline levels

Explanation

The neutralizer is an oxidizing agent that rebuilds the disulfide bonds in their new position, locking in the curl. Without this step the wave would gradually relax out of the hair.

Question 43Chemical Texture Services (perms and relaxers)

A client requests loose, flowing curls. Which rod should the stylist choose?

  1. A medium-diameter rod
  2. A small-diameter rod
  3. Any rod size with extra lotion
  4. A large-diameter rod Correct answer.

Explanation

Rod diameter controls curl size: large rods produce loose, wide curls while small rods produce tight curls. The amount of lotion used does not change the diameter of the resulting curl.

Question 44Chemical Texture Services (perms and relaxers)

A sodium hydroxide relaxer typically has a pH of about:

  1. 9.5
  2. 5.5
  3. 7.0
  4. 13.0 Correct answer.

Explanation

Sodium hydroxide relaxers are strongly alkaline, with a pH of roughly 13 to 14, which is what allows them to straighten the hair. Products far below this range cannot break the hair's bonds the same way.

Question 45Chemical Texture Services (perms and relaxers)

During a relaxer retouch, the product should be applied first to:

  1. The scalp
  2. The new growth Correct answer.
  3. The ends
  4. The previously relaxed hair

Explanation

Only the new growth still needs straightening, so product is applied there first. Applying to previously relaxed hair causes overlap and overprocessing.

Question 46Chemical Texture Services (perms and relaxers)

Which product is used to stop the chemical relaxing action?

  1. A deep conditioner
  2. A neutralizing shampoo Correct answer.
  3. A setting lotion
  4. A leave-in serum

Explanation

Neutralizing shampoo halts the relaxer's chemical action and helps restore the hair's normal pH. Conditioning and styling products cannot stop the reaction.

Question 47Chemical Texture Services (perms and relaxers)

What is the purpose of a protective base cream in a relaxer service?

  1. It restores the hair's natural pH balance
  2. It shields the scalp from irritation Correct answer.
  3. It adds shine to the hair
  4. It speeds up the processing time

Explanation

Base cream is applied to the scalp and hairline to create a barrier between the skin and the relaxer. It protects against burns and irritation but does not affect processing speed or hair condition.

Question 48Chemical Texture Services (perms and relaxers)

A wave lotion with a pH of about 5 is classified as:

  1. An acid wave Correct answer.
  2. An alkaline wave
  3. An exothermic wave
  4. A neutral wave

Explanation

Acid waves have a pH below 7, usually in the range of roughly 4.5 to 6.9, and are gentler than alkaline waves. Alkaline wave lotions fall near 9.0 to 9.6.

Question 49Chemical Texture Services (perms and relaxers)

What is the main purpose of a test curl during a permanent wave service?

  1. To check the strength of the neutralizer
  2. To decide which rod size to use
  3. To confirm the curl pattern has formed Correct answer.
  4. To measure the pH of the wave lotion

Explanation

A test curl shows whether the disulfide bonds have been reduced enough for the hair to accept the new shape. It is checked before the full processing time has elapsed and before neutralizing.

Question 50Chemical Texture Services (perms and relaxers)

Which wrap technique creates a stacked, layered curl effect on very long hair?

  1. Weave wrap
  2. Straight wrap
  3. Piggyback wrap Correct answer.
  4. Spiral wrap

Explanation

In a piggyback wrap, also called a bookend wrap, two rods are placed on the same base one above the other so long hair is wrapped in a shorter, layered pattern. A spiral wrap produces a corkscrew effect instead.