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Medical Lab Assistant exam study guide

What's on the exam and how to study for it. Free to read, no sign-up.

The exam at a glance

CSMLS Medical Laboratory Assistant certification exam: computer-based, 115 multiple-choice questions in 103 minutes (2 hours including introduction). One best answer; no 'all/none of the above'; images possible; no case studies. Pass mark set per exam form by modified Angoff. From the February 2027 exam the 2024 MLA Competency Profile applies (pre-analytical phase 40-50%).

Main topic areas

Area
ASafe work practices
BEquipment, instruments and reagents
CPre-analytical phase
DAnalytical phase
EPost-analytical phase
FQuality and resource management
GCommunication and collaboration
HProfessional practice

How to study

  1. Pre-analytical work (ID, requisitions, collection, handling) is close to half the exam.
  2. Know CLSI order of draw and tube additives cold.
  3. Know rejection criteria and what to do with irreplaceable specimens.
  4. Know WHMIS 2015 pictograms, TDG UN3373 packaging and routine practices.
  5. Most questions are application, not recall: think 'what should the MLA do next?'
  6. Practise every day in short sets. When you miss one, work out why each wrong option is wrong.

Try 3 sample questions

Original practice questions from our Medical Lab Assistant bank, not real exam questions.

Question 1

What is the single most important practice to prevent the spread of infection?

  1. A. Wearing a lab coat
  2. B. Keeping the lab cold
  3. C. Hand hygiene
  4. D. Using a mask
Show the answer

C. Hand hygiene

Clean hands before and after patient contact and after glove removal.

Question 2

A centrifuge has a rotor radius of 10 cm and spins at 3000 rpm. Using RCF = 1.118 x 10⁻⁵ x r x rpm², what is the approximate RCF?

  1. A. 1,006 x g
  2. B. 2,012 x g
  3. C. 101 x g
  4. D. 503 x g
Show the answer

A. 1,006 x g

1.118 x 10⁻⁵ x 10 x 3000² = 1006.2 ≈ 1,006 x g. Labs specify g-force, not rpm, because RCF depends on rotor radius.

Question 3

How many patient identifiers are required before collecting a specimen?

  1. A. Room number only
  2. B. One
  3. C. At least two, such as full name and date of birth or health card number
  4. D. One, such as the room number, if the patient is well known to the staff on the unit
Show the answer

C. At least two, such as full name and date of birth or health card number

Accreditation Canada requires two identifiers.

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Source

Checked October 2026. Exam details change, so confirm with your provincial regulator before you write. MedTestCoach is an independent study tool and isn't affiliated with any exam owner or regulator.