AMT Certified Medical Laboratory Assistant (CMLA) Certification Examination Practice Test
Medical laboratory assistant work combines specimen collection and handling with basic laboratory procedures, patient safety, and accurate use of equipment. This practice page samples situations involving venipuncture precautions, blood-smear preparation, microscopy, centrifuge safety, spill response, and specimen storage. These tasks call for careful attention to collection conditions, safe work practices, and the steps needed to preserve specimen quality before testing.
Exam overview
About the AMT Certified Medical Laboratory Assistant (CMLA) Certification Ex… Exam
Questions in this bank use practical scenarios to explore how laboratory assistants support the preanalytical phase of testing. They address patient positioning and precautions during blood collection, including when a patient has a history of fainting or an arteriovenous fistula. Specimen-related decisions include maintaining required storage conditions and preparing a capillary blood smear. Other items focus on consistent staining, microscope use at high magnification, and balancing centrifuge tubes before operation. Safety scenarios cover blood spills, broken glass, and the purpose of a safety data sheet. Together, these subjects involve recognizing hazards, following appropriate handling procedures, and selecting actions that protect patients, staff, and specimen integrity. The questions offer practice applying these concepts to routine bench and collection-room situations.
Sample Practice Questions
Review a selection from this exam's published US Practice Tests practice bank.
A laboratory assistant is preparing a manual differential blood smear stain. Which practice helps produce more consistent staining results?
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Correct answer: AFollowing the validated procedure for reagent proportions and staining times supports reproducible staining. Improvised timing or reagent handling can alter stain quality and appearance.
A blood spill occurs on a work surface. What should the assistant do first?
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Correct answer: BThe area should be controlled and appropriate protective equipment used before cleanup to reduce exposure risk. The spill should then be removed and disinfected according to the facility's approved procedure.
When preparing a peripheral blood smear from a capillary specimen, which approach generally supports a good smear?
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Correct answer: AA clean slide and prompt, controlled spreading help produce a smear suitable for examination. Allowing the drop to dry, applying excessive pressure, or adding water can impair smear quality.
Which action is generally appropriate when using a microscope to examine a prepared slide at high magnification?
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Correct answer: BLocating the specimen at lower magnification makes it easier to center the area of interest. At higher magnification, fine focus helps sharpen the image while reducing the risk of striking the slide with the objective.
A glass microscope slide breaks while a laboratory assistant is preparing a specimen. What is the safest way to clean up the broken glass?
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Correct answer: CBroken glass should be collected with tools rather than hands, even when gloves are worn, and discarded in a designated puncture-resistant container according to facility procedure.
Which statement best describes the purpose of a laboratory safety data sheet (SDS)?
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Correct answer: AAn SDS communicates information about a chemical's hazards, protective measures, handling and storage, and responses to exposure or spills. It complements, rather than replaces, appropriate labeling and training.
A laboratory assistant finds a specimen that requires refrigeration but cannot be delivered immediately. What should the assistant do?
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Correct answer: BSpecimens should be stored under the conditions specified for the requested test. Unapproved freezing or direct contact with a cold source may damage a specimen, so established handling procedures should be followed.
How to use this practice test
Access is free. A session presents up to 20 random questions from the 50-question practice bank, including scenarios on specimen handling, collection safety, and routine laboratory procedures. Results appear after the session, so you can identify which areas to revisit and compare your choices with the practical reasoning each scenario calls for.
Preparation tips
- Review venipuncture precautions for patients with an arteriovenous fistula, a history of fainting, or other collection-related risks.
- Practise the steps that support specimen integrity, including prompt delivery and required temperature conditions for specimens awaiting testing.
- Revisit safe centrifuge setup, including balancing opposing tubes and checking the rotor and lid before operation.
- Compare blood-smear preparation and staining practices, and review how to focus a microscope when moving to high magnification.
- Know the appropriate response principles for blood spills, broken glass, and locating hazard information in an SDS.