ASCP Histotechnologist (HTL) Practice Test 2026-2027 and Free Sample Questions

During routine tissue processing, the dehydration step is performed before clearing. What is the purpose of the dehydration step using graded alcohols?

A histotechnologist needs a clearing agent that will replace alcohol and be miscible with paraffin during processing. Which agent is a traditional clearing agent used between dehydration and infiltration?

While cutting paraffin sections, a histotechnologist notices the ribbon is curving and the sections are compressed and thick and thin in alternating bands. Which microtomy problem is most consistent with thick and thin alternating sections?

In the routine hematoxylin and eosin stain, hematoxylin is applied first. What cellular component does hematoxylin primarily stain and what color does it produce?

A pathologist requests a special stain to demonstrate basement membranes and glycogen in a kidney biopsy. Which special stain is most appropriate for highlighting these carbohydrate-rich structures?

A histotechnologist must demonstrate amyloid deposits in a tissue section. After staining with the appropriate dye, the amyloid shows a characteristic apple-green birefringence. Which stain produces this finding when viewed under polarized light?

A specimen for routine histology is placed in 10 percent neutral buffered formalin. What is the recommended minimum ratio of fixative volume to tissue volume to ensure adequate fixation?

After cutting, paraffin ribbons are floated on a warm water bath before being picked up on slides. What is the primary purpose of the water bath in this step?

During hematoxylin and eosin staining, a histotechnologist performs a differentiation step with acid alcohol after applying hematoxylin. What does the differentiation step accomplish?

A batch of slides shows tissue that is brittle and crumbles during sectioning, and the processing log shows the tissue spent too long in the final paraffin baths. Which processing error best explains brittle, overhard tissue?

A pathologist suspects a fungal infection and requests a silver stain that will outline fungal organisms in black against a light green background. Which stain meets this description?

A histotechnologist is sectioning a paraffin block and the sections are not forming a continuous ribbon, instead separating into individual pieces. Which adjustment most directly promotes ribbon formation?

A frozen section is requested intraoperatively. The tissue is rapidly frozen in a cryostat. What is the main advantage of frozen section over routine paraffin processing in this setting?

A histotechnologist must select a fixative for a specimen that will undergo immunohistochemistry. Why is 10 percent neutral buffered formalin generally preferred over a fixative such as Bouin solution for many immunohistochemical applications?

A finished hematoxylin and eosin slide appears overall too pale, with both nuclei and cytoplasm weakly stained. The staining solutions were recently used many times. Which cause is most likely?

A histotechnologist embeds processed tissue into a paraffin block. During embedding, why is it important to correctly orient the tissue in the mold?

A histotechnologist performs a Masson trichrome stain on a liver biopsy to assess fibrosis. In a properly stained trichrome section, collagen typically appears which color?

A histology laboratory monitors employee exposure to formaldehyde vapors. Why is controlling formaldehyde exposure an important safety priority in the histology lab?

A histotechnologist faces a paraffin block before sectioning by trimming the surface with coarse cuts. What is the main purpose of facing or rough cutting the block?