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MI Cosmetology study materials
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MI Cosmetology practice questions

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Question 1Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

What term is used for a microorganism that causes disease?

  1. Nonpathogen
  2. Pathogen Correct answer.
  3. Saprophyte
  4. Spore

Explanation

A pathogen is any microorganism capable of producing disease in a host. Saprophytes are non-disease-causing organisms that live on dead matter, and a spore is a resistant resting form, not a disease-causing category.

Question 2Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

A solution with a pH of 3 is best described as:

  1. Slightly alkaline
  2. Alkaline
  3. Neutral
  4. Acidic Correct answer.

Explanation

The pH scale runs from 0 to 14, with 7 neutral; values below 7 are acidic and values above 7 are alkaline. A pH of 3 is well below neutral, so the solution is acidic.

Question 3Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which term describes the chemical process that destroys most, but not necessarily all, harmful organisms on a surface?

  1. Decontamination
  2. Sterilization
  3. Sanitizing
  4. Disinfection Correct answer.

Explanation

Disinfection uses chemical agents to destroy most harmful organisms on nonliving surfaces, though bacterial spores may survive. Sterilization destroys all microbial life, while sanitizing only reduces organisms to a level considered safe by public health standards.

Question 4Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which layer of the skin is the outermost and thinnest layer?

  1. Epidermis Correct answer.
  2. Stratum germinativum
  3. Dermis
  4. Subcutaneous layer

Explanation

The skin has three main layers: the epidermis on the outside, the dermis beneath it, and the subcutaneous layer deepest. The epidermis is the thin outer layer that contains the stratum germinativum at its base.

Question 5Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which of these materials is a good conductor of electricity?

  1. Rubber
  2. Copper Correct answer.
  3. Dry wood
  4. Glass

Explanation

Conductors allow electrical current to flow easily because their electrons move freely; most metals, including copper, are excellent conductors. Rubber, glass, and dry wood are insulators that resist the flow of current.

Question 6Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

The tough outer layer of the hair shaft, made of overlapping scales, is the:

  1. Cortex
  2. Medulla
  3. Follicle
  4. Cuticle Correct answer.

Explanation

The hair shaft has three layers: the cuticle on the outside, the cortex in the middle, and the medulla at the core. The cuticle consists of overlapping scales that protect the inner structures.

Question 7Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which of the following is a bloodborne pathogen?

  1. Athlete's foot fungus
  2. Common cold
  3. Hepatitis B Correct answer.
  4. Influenza

Explanation

Hepatitis B is transmitted through contact with infected blood and other body fluids, making it a bloodborne pathogen of concern in salons. Influenza and the common cold spread mainly through airborne droplets, and athlete's foot is a fungal skin infection.

Question 8Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

A substance that dissolves another substance to form a solution is called a:

  1. Solvent Correct answer.
  2. Suspension
  3. Solute
  4. Emulsion

Explanation

In a solution, the solvent is the substance that does the dissolving and is usually present in the greater amount. The solute is the substance being dissolved.

Question 9Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which method is the most reliable way to sterilize metal implements before reuse?

  1. UV light cabinet
  2. Steam autoclave Correct answer.
  3. Soaking in quats
  4. Wiping with alcohol

Explanation

An autoclave uses saturated steam under pressure to destroy all microorganisms, including bacterial spores, which is the definition of sterilization. UV cabinets, quats, and alcohol only disinfect surfaces and cannot guarantee spore destruction.

Question 10Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

The nail plate is formed and pushed forward by the:

  1. Lunula
  2. Hyponychium
  3. Matrix Correct answer.
  4. Cuticle

Explanation

The matrix is the active tissue at the base of the nail where new cells are produced and keratinized; these cells harden and are pushed forward to become the nail plate. The lunula is simply the visible whitish portion of the matrix.

Question 11Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which muscle is responsible for closing the jaw during chewing?

  1. Platysma
  2. Occipitalis
  3. Procerus
  4. Masseter Correct answer.

Explanation

The masseter is the chewing muscle that raises the lower jaw to close the mouth. It is one of the muscles of mastication located at the angle of the jaw.

Question 12Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

In permanent hair color, hydrogen peroxide functions mainly as a(n):

  1. Solvent
  2. Conditioner
  3. Oxidizing agent Correct answer.
  4. Alkaline builder

Explanation

Hydrogen peroxide is the developer in permanent color; it oxidizes the natural melanin to lighten it and drives the oxidation of dye intermediates so they form larger color molecules inside the cortex. Alkaline agents such as ammonia serve a different role by opening the cuticle.

Question 13Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Electrical resistance is measured in:

  1. Ohm Correct answer.
  2. Ampere
  3. Watt
  4. Volt

Explanation

The ohm measures resistance, or how much a material opposes the flow of current. Amperes measure current strength, volts measure force or pressure, and watts measure electrical power.

Question 14Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which body system carries excess fluid away from tissues and produces white blood cells that fight infection?

  1. Integumentary system
  2. Respiratory system
  3. Lymphatic system Correct answer.
  4. Endocrine system

Explanation

The lymphatic system drains excess tissue fluid through lymph vessels and contains lymph nodes and white blood cells that help defend the body. It works alongside the circulatory system rather than moving blood itself.

Question 15Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which shampoo ingredient attracts both water and oil so that sebum can be rinsed away?

  1. Humectant
  2. Surfactant Correct answer.
  3. Preservative
  4. pH adjuster

Explanation

Surfactants have a water-loving end and an oil-loving end, allowing them to lift oily soil into water so it can be rinsed away. This dual attraction is the basis of cleansing in shampoos.

Question 16Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

In a parallel circuit, if one lamp burns out, the other lamps in the circuit will:

  1. Dim noticeably
  2. Stop working
  3. All go out
  4. Remain lit Correct answer.

Explanation

In a parallel circuit each load has its own separate path to the power source, so one broken path does not stop current to the others. In a series circuit, by contrast, a single break stops the entire flow.

Question 17Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

The artery that supplies blood to the head, face, and neck is the:

  1. Brachial artery
  2. Carotid artery Correct answer.
  3. Radial artery
  4. Femoral artery

Explanation

The common carotid artery is the main artery of the head, face, and neck, branching into internal and external carotids. The other listed arteries serve the arm, thigh, and wrist.

Question 18Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

A Safety Data Sheet (SDS) for a salon product provides information about the product's:

  1. Color matching and formulation data
  2. Hazard warnings and safe handling instructions Correct answer.
  3. Manufacturer advertising and marketing claims
  4. Retail pricing and warranty terms

Explanation

An SDS is a standardized document that lists a product's hazardous ingredients, health and fire hazards, first-aid measures, and safe handling and storage requirements. Its purpose is workplace safety, not selling or pricing.

Question 19Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

The slightly acidic film on the skin's surface that helps protect against bacteria is called the:

  1. Keratin layer
  2. Melanin barrier
  3. Sweat gland
  4. Acid mantle Correct answer.

Explanation

Secretions of sebum and sweat form a slightly acidic film on the skin, commonly called the acid mantle, which inhibits bacterial growth. Its pH is typically around 4.5 to 5.5.

Question 20Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Hard water interferes with shampoo lather mainly because it contains dissolved:

  1. Chlorides and fluorides
  2. Iron and copper traces
  3. Sodium and potassium salts
  4. Calcium and magnesium Correct answer.

Explanation

Hard water contains dissolved calcium and magnesium ions that react with soap and surfactant molecules to form an insoluble film, reducing lather and leaving dulling residue. Soft water has low concentrations of these minerals.

Question 21Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

The chief sensory nerve of the face that also controls the muscles of chewing is the:

  1. Second cranial nerve
  2. Fifth cranial nerve Correct answer.
  3. Seventh cranial nerve
  4. Eleventh cranial nerve

Explanation

The fifth cranial nerve, the trigeminal, is the chief sensory nerve of the face and head and also carries motor fibers to the muscles of mastication. The seventh cranial nerve is the chief motor nerve of the face.

Question 22Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which bond in the hair is broken by water and re-formed as the hair dries, making wet setting possible?

  1. Hydrogen bond Correct answer.
  2. Peptide bond
  3. Metallic bond
  4. Disulfide bond

Explanation

Hydrogen bonds are weak side bonds that water breaks, allowing hair to be reshaped while wet; as the hair dries, the bonds re-form in the new shape. Disulfide bonds are stronger and change only with chemical texture services.

Question 23Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

In galvanic hair removal, the negative electrode that attracts positively charged ions is the:

  1. Modality
  2. Cathode Correct answer.
  3. Anode
  4. Rectifier

Explanation

In galvanic current, the cathode is the negative pole and attracts positive ions, producing an alkaline reaction at the needle. The anode is the positive pole and produces an acidic reaction.

Question 24Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Two liquids that normally do not mix are combined and held together with the help of an emulsifier to form a(n):

  1. Suspension
  2. Compound
  3. Emulsion Correct answer.
  4. Solution

Explanation

An emulsion is a stable blend of two immiscible liquids, such as oil and water, held together by an emulsifying agent. A solution involves dissolved substances, and a suspension consists of temporarily dispersed particles.

Question 25Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

An implement has been used on a client and is visibly soiled with blood. What is the correct procedure?

  1. Disinfect it, then clean it
  2. Clean it, then disinfect it Correct answer.
  3. Rinse it and reuse it
  4. Wipe it and store it

Explanation

Visibly soiled implements must first be cleaned with soap and water, because organic matter and residue prevent the disinfectant from contacting the surface. After cleaning, the item is immersed in an EPA-registered hospital disinfectant with a tuberculocidal claim.

Question 26Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Disease-causing microorganisms are called:

  1. pathogens Correct answer.
  2. nonpathogens
  3. spores
  4. toxins

Explanation

A pathogen is any microorganism that causes disease. Nonpathogens do not cause disease, while spores are resistant resting forms and toxins are poisonous substances produced by some organisms.

Question 27Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which layer of the skin contains blood vessels, nerve endings, and hair follicles?

  1. Epidermis
  2. Dermis Correct answer.
  3. Subcutaneous layer
  4. Stratum corneum

Explanation

The dermis is the middle layer of the skin and contains connective tissue, blood vessels, nerve endings, glands, and hair follicles. The epidermis is the outer avascular layer, and the subcutaneous layer is the deepest fatty layer.

Question 28Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Electrical pressure, the force that pushes current through a conductor, is measured in:

  1. ohms
  2. volts Correct answer.
  3. amperes
  4. watts

Explanation

Voltage is the unit of electromotive force, or electrical pressure. Amperes measure current, ohms measure resistance, and watts measure electrical power.

Question 29Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which form of hepatitis is spread mainly through contaminated food and water?

  1. Hepatitis B
  2. Hepatitis C
  3. Hepatitis A Correct answer.
  4. Hepatitis D

Explanation

Hepatitis A is transmitted mainly by the fecal-oral route through contaminated food, water, or poor hand hygiene. Hepatitis B, C, and D are spread primarily through blood and body fluids.

Question 30Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Pediculosis is an infestation caused by:

  1. bacteria
  2. lice Correct answer.
  3. viruses
  4. fungi

Explanation

Pediculosis is an infestation of lice, which are parasitic insects that live on the scalp or body. Fungi cause conditions such as tinea, bacteria cause infections such as impetigo, and viruses cause conditions such as herpes.

Question 31Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which muscle raises the eyebrows and creates wrinkles across the forehead?

  1. Orbicularis oculi
  2. Masseter
  3. Temporalis
  4. Frontalis Correct answer.

Explanation

The frontalis muscle covers the frontal bone and raises the eyebrows, producing forehead wrinkles. The masseter and temporalis are chewing muscles, and the orbicularis oculi closes the eyelid.

Question 32Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which bone is the largest in the facial skeleton and forms the lower jaw?

  1. Nasal bone
  2. Mandible Correct answer.
  3. Zygomatic bone
  4. Maxilla

Explanation

The mandible is the lower jawbone and is the largest bone of the facial skeleton. It is also the only movable bone of the skull.

Question 33Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which of these is a physical change rather than a chemical change?

  1. Milk souring
  2. Wax melting Correct answer.
  3. Paper burning
  4. Iron rusting

Explanation

A physical change alters the state or appearance of a substance without forming a new substance. Melting wax is reversible and does not change its chemical identity, whereas rusting, burning, and souring produce new substances.

Question 34Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which of these substances is a compound?

  1. Water (H2O) Correct answer.
  2. Salt water
  3. Oxygen (O2)
  4. Air

Explanation

A compound consists of two or more elements chemically combined in a fixed ratio, as in water. Oxygen is an element, while air and salt water are mixtures.

Question 35Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

A 10-ohm resistor carries a current of 2 amperes. What voltage is across the resistor?

  1. 20 volts Correct answer.
  2. 12 volts
  3. 5 volts
  4. 0.2 volts

Explanation

Ohm's law states that voltage equals current multiplied by resistance (V = I × R). Multiplying 2 amperes by 10 ohms gives 20 volts.

Question 36Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which of these materials is the best conductor of electricity?

  1. Rubber
  2. Glass
  3. Copper Correct answer.
  4. Dry wood

Explanation

Metals such as copper have loosely bound electrons that move freely, making them good conductors. Rubber, glass, and dry wood are insulators.

Question 37Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

A solution has a hydrogen ion concentration of 1 × 10^-4 moles per liter. What is its pH?

  1. 14
  2. 1
  3. 10
  4. 4 Correct answer.

Explanation

pH is the negative logarithm of the hydrogen ion concentration. The negative logarithm of 1 × 10^-4 is 4, so the solution is acidic.

Question 38Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

The frontalis and occipitalis muscles are connected by a broad tendon called the:

  1. sternocleidomastoid
  2. buccinator
  3. galea aponeurotica Correct answer.
  4. orbicularis oris

Explanation

The galea aponeurotica is the broad tendon that covers the top of the skull and links the frontalis and occipitalis muscles. The other options are separate muscles of the neck and face.

Question 39Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

A 60-watt lamp is connected to a 120-volt circuit. What current does it draw?

  1. 0.5 ampere Correct answer.
  2. 2 amperes
  3. 0.2 ampere
  4. 7,200 amperes

Explanation

Electrical power equals voltage multiplied by current, so current equals power divided by voltage (I = P ÷ V). Dividing 60 watts by 120 volts gives 0.5 ampere.

Question 40Scientific Concepts (infection control, anatomy and physiology, chemistry, electricity)

Which process destroys all microbial life on a salon implement, including bacterial spores?

  1. Sterilization Correct answer.
  2. Sanitization
  3. High-level disinfection
  4. Cleaning

Explanation

Sterilization is the only process that destroys all microbial life, including highly resistant bacterial spores. Disinfection and sanitization reduce or eliminate many microorganisms but do not reliably destroy spores, and cleaning removes visible debris rather than killing microorganisms.

Question 41Hair Care and Hairdressing (cutting, styling, chemical services, coloring)

A graduated (stacked) haircut is created by cutting the hair at which elevation?

  1. 0 degrees
  2. 45 degrees Correct answer.
  3. 90 degrees
  4. 180 degrees

Explanation

Elevation is the angle at which a subsection is held away from the head. Cutting at 45 degrees builds a stacked weight line with graduated lengths, which is the defining feature of a graduated cut.

Question 42Hair Care and Hairdressing (cutting, styling, chemical services, coloring)

Which blow-dryer attachment focuses the airflow on a small section to help smooth the cuticle?

  1. Pick
  2. Concentrator Correct answer.
  3. Vent brush
  4. Diffuser

Explanation

A concentrator narrows the airflow so it is directed at one section of hair, allowing the cuticle to be smoothed in the direction of growth. Diffusers spread the air out, and picks lift hair at the scalp.

Question 43Hair Care and Hairdressing (cutting, styling, chemical services, coloring)

What pH range is normal for healthy hair and scalp?

  1. 2.0 to 3.0
  2. 4.5 to 5.5 Correct answer.
  3. 7.0 to 8.0
  4. 9.0 to 10.0

Explanation

Hair and scalp are mildly acidic, averaging a pH of about 4.5 to 5.5. This acidity keeps the cuticle tight and helps the hair retain moisture.

Question 44Hair Care and Hairdressing (cutting, styling, chemical services, coloring)

Which layer of the hair shaft contains the melanin and provides most of the hair's strength and elasticity?

  1. Papilla
  2. Medulla
  3. Cuticle
  4. Cortex Correct answer.

Explanation

The cortex is the middle and thickest layer and holds the melanin granules that give hair its color. Its protein structure is what gives hair strength and elasticity.

Question 45Hair Care and Hairdressing (cutting, styling, chemical services, coloring)

Which developer strength is used to deposit haircolor with essentially no lifting action?

  1. 40 volume
  2. 10 volume Correct answer.
  3. 30 volume
  4. 20 volume

Explanation

Developer strength controls how much lift occurs because it sets the amount of ammonia and oxygen available. Ten volume (about 3 percent) deposits color without lightening the natural pigment.

Question 46Hair Care and Hairdressing (cutting, styling, chemical services, coloring)

White or gray hair appears without color because the hair lacks which component?

  1. Cortex cells
  2. Melanin Correct answer.
  3. Natural oils
  4. Scalp sebum

Explanation

Gray and white hair contains little or no melanin in the cortex, so light reflects rather than being absorbed as color. The hair structure itself is otherwise unchanged.

Question 47Hair Care and Hairdressing (cutting, styling, chemical services, coloring)

Which thermal iron barrel produces the tightest curl when used with the same technique and tension?

  1. 2-inch barrel
  2. 1-inch barrel
  3. 1 1/2-inch barrel
  4. 3/4-inch barrel Correct answer.

Explanation

Barrel diameter determines curl size: the smaller the barrel, the smaller the diameter of the curl it produces. A 3/4-inch barrel therefore yields a tighter curl than any larger iron.

Question 48Hair Care and Hairdressing (cutting, styling, chemical services, coloring)

Which sectioning divides the head into two equal halves before cutting?

  1. A center section from the front hairline to the nape Correct answer.
  2. A horseshoe section around the crown
  3. A horizontal section across the nape
  4. A diagonal section above the ear

Explanation

Cutting begins by dividing the hair into workable areas, and the center section running from the front hairline to the nape splits the head into two equal halves. Each half is then subdivided for control.

Question 49Hair Care and Hairdressing (cutting, styling, chemical services, coloring)

What is the function of the neutralizer in a permanent wave service?

  1. It adds moisture back into the hair after processing
  2. It rebuilds the disulfide bonds in their new position Correct answer.
  3. It coats the hair to block further processing
  4. It swells the hair shaft and lifts the cuticle

Explanation

Waving lotion breaks disulfide bonds so the hair can be shaped around the rod. The neutralizer then re-forms those bonds in the new shape, which is what makes the curl lasting.

Question 50Hair Care and Hairdressing (cutting, styling, chemical services, coloring)

Applying chemical relaxer over hair that was already relaxed (overlapping) most often results in which outcome?

  1. A looser curl pattern
  2. Breakage and scalp irritation Correct answer.
  3. Faster processing time
  4. Brighter color result

Explanation

Previously relaxed hair has already been chemically processed and is weaker, so additional relaxer overprocesses it. This causes breakage and can burn the scalp.