ASCP HT HISTOTECHNICIAN EXAM | ALL
PRACTICE Q&A 2026/2027 | A+ GRADED |
COMPREHENSIVE EXAM GUIDE 2026&2027
1. A histotechnician receives a fresh tissue specimen that has been designated for routine
histologic examination. Which action should be performed first to minimize autolysis?
A. Place the specimen immediately into an appropriate fixative
B. Place the specimen in xylene
C. Freeze the specimen at -80°C
D. Place the specimen directly into molten paraffin
Answer: A
Prompt fixation limits autolysis and preserves cellular and tissue morphology. Xylene and
paraffin are processing reagents, while freezing is reserved for specific indications.
2. Which fixative is routinely used for most surgical pathology specimens because it
provides good overall preservation of cellular detail and is compatible with many
downstream techniques?
A. Bouin solution
B. 10% neutral buffered formalin
C. Carnoy solution
D. Zenker solution
Answer: B
10% neutral buffered formalin is the routine fixative for many surgical pathology specimens
because it provides reliable preservation while supporting routine processing and numerous
ancillary procedures.
3. A specimen is placed in an inadequate volume of formalin. Which artifact is most likely
to result?
A. Excessive paraffin infiltration
B. Incomplete fixation
C. Excessive section compression
D. Overdecalcification
Answer: B
An insufficient fixative-to-tissue ratio can prevent adequate penetration and fixation,
particularly in larger or thicker specimens.
,4. Which factor most directly affects the rate at which formalin penetrates tissue?
A. Tissue color
B. Paraffin melting point
C. Tissue thickness
D. Microtome blade angle
Answer: C
Fixative penetration is strongly influenced by tissue thickness. Thinly trimmed tissue allows
formalin to reach the interior more efficiently than thick tissue.
5. During grossing, a tissue specimen is trimmed into excessively thick pieces before
fixation. What is the primary concern?
A. Increased hematoxylin staining
B. Delayed fixation of the tissue center
C. Increased eosin penetration
D. Improved antigen preservation
Answer: B
Thick tissue pieces slow fixation because formalin must diffuse farther into the specimen,
increasing the risk of autolysis and poor morphology in the center.
6. Which statement best describes the purpose of fixation in histotechnology?
A. To dissolve paraffin from tissue
B. To remove calcium salts
C. To preserve tissue structure and prevent autolysis and decomposition
D. To stain nuclei selectively
Answer: C
Fixation stabilizes tissue components, limits enzymatic degradation, and preserves
morphology for subsequent processing and staining.
7. A laboratory receives a biopsy that must be evaluated for a specific enzyme activity that
would be destroyed by routine formalin fixation. What is the most appropriate approach?
A. Process all tissue routinely in formalin
B. Follow the laboratory's validated protocol for fresh or appropriately preserved tissue
C. Place the specimen in strong acid
D. Decalcify the specimen immediately
Answer: B
Some enzyme studies require preservation of enzymatic activity, so the specimen must be
handled according to the validated method rather than automatically subjected to routine
fixation.
,8. Which processing step removes water from fixed tissue before exposure to a clearing
agent?
A. Dehydration
B. Clearing
C. Infiltration
D. Section flotation
Answer: A
Dehydration removes water from tissue, generally through graded alcohols, allowing
subsequent replacement of alcohol by a compatible clearing agent.
9. What is the primary purpose of a clearing agent during tissue processing?
A. To stain cytoplasm
B. To remove calcium
C. To replace dehydrating alcohol and prepare tissue for paraffin infiltration
D. To restore antigenicity
Answer: C
Clearing agents replace alcohol and make tissue compatible with the infiltration medium,
commonly paraffin.
10. A tissue cassette remains excessively soft after routine processing. Which processing
problem should be considered first?
A. Inadequate dehydration or infiltration
B. Excessive hematoxylin exposure
C. Excessive eosin differentiation
D. Excessive coverslipping
Answer: A
Residual water or inadequate paraffin infiltration can leave tissue too soft for proper
sectioning.
11. Which characteristic is most desirable in a routine paraffin infiltration medium?
A. Complete water solubility
B. Ability to support and infiltrate tissue adequately
C. Strong acidic activity
D. Ability to dissolve glass
Answer: B
The infiltration medium must adequately permeate the tissue and provide sufficient support
for sectioning.
, 12. A processed tissue block produces sections that crumble rather than form continuous
ribbons. Which factor may contribute to this problem?
A. Inadequate processing or brittle paraffin
B. Excessive water-bath temperature
C. Excessive eosin staining
D. Overuse of coverslips
Answer: A
Poor processing or an inappropriate paraffin formulation can produce brittle tissue or poor
support, causing sections to fragment.
13. Which microtome component advances the specimen toward the cutting surface by a
controlled distance?
A. Condenser
B. Feed mechanism
C. Water bath
D. Cryostat chamber
Answer: B
The feed mechanism controls the incremental movement of the specimen toward the blade,
determining section thickness.
14. A technologist notices repeated thick and thin areas within otherwise continuous
paraffin sections. Which problem should be investigated?
A. Microtome or block stability
B. Eosin pH only
C. Coverslip adhesive only
D. Water-bath cleanliness only
Answer: A
Alternating section thickness can result from mechanical instability, loose components,
improper blade conditions, or problems with block preparation.
15. Which sectioning artifact is characterized by repeated parallel lines across the tissue
section?
A. Chatter
B. Folds
C. Knife lines
D. Floaters
Answer: C
PRACTICE Q&A 2026/2027 | A+ GRADED |
COMPREHENSIVE EXAM GUIDE 2026&2027
1. A histotechnician receives a fresh tissue specimen that has been designated for routine
histologic examination. Which action should be performed first to minimize autolysis?
A. Place the specimen immediately into an appropriate fixative
B. Place the specimen in xylene
C. Freeze the specimen at -80°C
D. Place the specimen directly into molten paraffin
Answer: A
Prompt fixation limits autolysis and preserves cellular and tissue morphology. Xylene and
paraffin are processing reagents, while freezing is reserved for specific indications.
2. Which fixative is routinely used for most surgical pathology specimens because it
provides good overall preservation of cellular detail and is compatible with many
downstream techniques?
A. Bouin solution
B. 10% neutral buffered formalin
C. Carnoy solution
D. Zenker solution
Answer: B
10% neutral buffered formalin is the routine fixative for many surgical pathology specimens
because it provides reliable preservation while supporting routine processing and numerous
ancillary procedures.
3. A specimen is placed in an inadequate volume of formalin. Which artifact is most likely
to result?
A. Excessive paraffin infiltration
B. Incomplete fixation
C. Excessive section compression
D. Overdecalcification
Answer: B
An insufficient fixative-to-tissue ratio can prevent adequate penetration and fixation,
particularly in larger or thicker specimens.
,4. Which factor most directly affects the rate at which formalin penetrates tissue?
A. Tissue color
B. Paraffin melting point
C. Tissue thickness
D. Microtome blade angle
Answer: C
Fixative penetration is strongly influenced by tissue thickness. Thinly trimmed tissue allows
formalin to reach the interior more efficiently than thick tissue.
5. During grossing, a tissue specimen is trimmed into excessively thick pieces before
fixation. What is the primary concern?
A. Increased hematoxylin staining
B. Delayed fixation of the tissue center
C. Increased eosin penetration
D. Improved antigen preservation
Answer: B
Thick tissue pieces slow fixation because formalin must diffuse farther into the specimen,
increasing the risk of autolysis and poor morphology in the center.
6. Which statement best describes the purpose of fixation in histotechnology?
A. To dissolve paraffin from tissue
B. To remove calcium salts
C. To preserve tissue structure and prevent autolysis and decomposition
D. To stain nuclei selectively
Answer: C
Fixation stabilizes tissue components, limits enzymatic degradation, and preserves
morphology for subsequent processing and staining.
7. A laboratory receives a biopsy that must be evaluated for a specific enzyme activity that
would be destroyed by routine formalin fixation. What is the most appropriate approach?
A. Process all tissue routinely in formalin
B. Follow the laboratory's validated protocol for fresh or appropriately preserved tissue
C. Place the specimen in strong acid
D. Decalcify the specimen immediately
Answer: B
Some enzyme studies require preservation of enzymatic activity, so the specimen must be
handled according to the validated method rather than automatically subjected to routine
fixation.
,8. Which processing step removes water from fixed tissue before exposure to a clearing
agent?
A. Dehydration
B. Clearing
C. Infiltration
D. Section flotation
Answer: A
Dehydration removes water from tissue, generally through graded alcohols, allowing
subsequent replacement of alcohol by a compatible clearing agent.
9. What is the primary purpose of a clearing agent during tissue processing?
A. To stain cytoplasm
B. To remove calcium
C. To replace dehydrating alcohol and prepare tissue for paraffin infiltration
D. To restore antigenicity
Answer: C
Clearing agents replace alcohol and make tissue compatible with the infiltration medium,
commonly paraffin.
10. A tissue cassette remains excessively soft after routine processing. Which processing
problem should be considered first?
A. Inadequate dehydration or infiltration
B. Excessive hematoxylin exposure
C. Excessive eosin differentiation
D. Excessive coverslipping
Answer: A
Residual water or inadequate paraffin infiltration can leave tissue too soft for proper
sectioning.
11. Which characteristic is most desirable in a routine paraffin infiltration medium?
A. Complete water solubility
B. Ability to support and infiltrate tissue adequately
C. Strong acidic activity
D. Ability to dissolve glass
Answer: B
The infiltration medium must adequately permeate the tissue and provide sufficient support
for sectioning.
, 12. A processed tissue block produces sections that crumble rather than form continuous
ribbons. Which factor may contribute to this problem?
A. Inadequate processing or brittle paraffin
B. Excessive water-bath temperature
C. Excessive eosin staining
D. Overuse of coverslips
Answer: A
Poor processing or an inappropriate paraffin formulation can produce brittle tissue or poor
support, causing sections to fragment.
13. Which microtome component advances the specimen toward the cutting surface by a
controlled distance?
A. Condenser
B. Feed mechanism
C. Water bath
D. Cryostat chamber
Answer: B
The feed mechanism controls the incremental movement of the specimen toward the blade,
determining section thickness.
14. A technologist notices repeated thick and thin areas within otherwise continuous
paraffin sections. Which problem should be investigated?
A. Microtome or block stability
B. Eosin pH only
C. Coverslip adhesive only
D. Water-bath cleanliness only
Answer: A
Alternating section thickness can result from mechanical instability, loose components,
improper blade conditions, or problems with block preparation.
15. Which sectioning artifact is characterized by repeated parallel lines across the tissue
section?
A. Chatter
B. Folds
C. Knife lines
D. Floaters
Answer: C
