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CHT EXAM PREP(HISTOCOMPATIBILITY TECH) QUESTIONS & ANSWERS
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CHT EXAM PREP(HISTOCOMPATIBILITY TECH) QUESTIONS & ANSWERS
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CHT EXAM PREP(HISTOCOMPATIBILITY TECH)QUESTIONS & ANSWERS
Which of the following procedures is not part of universal precautions when performing a
blood draw?
a. Wear a lab coat or gown
b. Change gloves between each patient
c. Do not recap, break or resheath needles
d. Use a sharps container for disposal of all needles e. Inform the patient of your HIV status
Correct Ans-E. Inform the patient of your HIV status
Liquid nitrogen presents what danger(s) to personnel?
a. Toxicity, suffocation
b. Frost bite, suffocation
c. Flammability, toxicity
d. Toxicity, frost bite
e. Flammability, frost bite Correct Ans-B. Frost bite, suffocation
A chemical has an NFPA rating as indicated below. What is an accurate statement of its
hazards?
, CHT EXAM PREP(HISTOCOMPATIBILITY TECH)
QUESTIONS & ANSWERS
a. High health hazard, low reactivity and flammability b. High reactivity and flammability, low
radioactivity c. Explosive but otherwise innocuous
d. Unstable at low temperatures, some gamma ray emissions
e. Low health hazard but high flammability and reactivity Correct Ans-A. High health
hazard, low reactivity and flammability
What is a fire assembly area?
a. Where all the firefighting equipment is stored
b. Where the firefighters gather to enter the building c. A predetermined safe place to meet
during a fire d. The location of the main controls for electrical panels
e. The location where a fire started Correct Ans-C. A predetermined safe place to meet
during a fire
A chemical has an OSHA GHS hazard pictogram as indicated below. What type of hazard is
being shown?
a. Corrosive
b. Skin irritant
c. Gas under pressure
d. Carcinogen
e. None of the above Correct Ans-D. Carcinogen
, CHT EXAM PREP(HISTOCOMPATIBILITY TECH)
QUESTIONS & ANSWERS
Reagent X arrives in the lab without an expiration date. What action should you take?
a. Develop a written policy that states, "Chemicals with unlisted expiration dates are good for
7 years" b. Buy two bottles of the chemical. Store one, as recommended, at 4°C and the other
at RT. When the RT one goes bad you know the 4°C is also bad
c. Use the chemical until routine clinical assays show obvious degradation
d. Periodically QC the reagent and develop a QA analysis of its performance to derive an
appropriate expiration date
e. Read the ASHI manual and find published expiration guidelines Correct Ans-D.
Periodically QC the reagent and develop a QA analysis of its performance to derive an
appropriate expiration date
You have finished doing an HLA typing and antibody screen on a potential kidney recipient,
but the pt decides they don't want to be listed for transplant. What should you do with the
reports and other patient records you have, some of which are online in the laboratory's
information system and some of which are on paper?
a. Delete them from the LIS and destroy all paper records, including sample requisitions, using
whichever method is fastest and most secure.
b. Records in the LIS can be maintained if the system is secure, but paper records must be
recycled in a locked and secure recycling bin.
c. Save all electronic and paper records for at least 2 years, as long as the LIS is backed up
regularly and paper storage is secure.
, CHT EXAM PREP(HISTOCOMPATIBILITY TECH)
QUESTIONS & ANSWERS
d. Scan and print all LIS records so that all records can be saved in two different formats.
e. Save all electronic and paper records for as long as you have room for them. Correct
Ans-C. Save all electronic and paper records for at least 2 years, as long as the LIS is backed up
regularly and paper storage is secure.
If you counted 311 cells in 3 of the 4 outside squares of a hemocytometer and the sample was
initially diluted 1:8 what is the cell concentration?
a. 1.5 x 106 cells/ul
b. 29.9 x 106 cells/ml
c. 29.9 x 106 cells/ul
d. 8.3 x 106 cells/ml Correct Ans-D. 8.3 x 106 cells/ml
A 100 ul stock solution of DNA is at 160 ug/ml. To what final volume should you dilute the
stock to achieve a working concentration of 40 ng/ul?
a. 4.0 ml
b. 6.4 ml
c. 400 ul
d. 640 ul
e. 40 ml Correct Ans-C. 400ul
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