Hematology – Rodaks UPDATED
Questions and CORRECT Answers
d. Concentrated acids - CORRECT ANSWER- ✔✔Standard precautions apply to all of the
following except: a. Blood b. Cerebrospinal fluid c. Semen d. Concentrated acids
b. Proper hand washing - CORRECT ANSWER- ✔✔The most important practice in
preventing the spread of disease is: a. Wearing masks during patient contact b. Proper hand
washing c. Wearing disposable laboratory coats d.Identifying specimens from known or
suspected HIVand HBV-infected patients with a red label
c. 1:10 - CORRECT ANSWER- ✔✔The appropriate dilution of bleach to be used in
laboratory disinfection is: a. 1:2 b. 1:5 c. 1:10 d. 1:100
c. Quarterly - CORRECT ANSWER- ✔✔How frequently should fire alarms and sprinkler
systems be tested? a. Weekly b. Monthly c. Quarterly d. Annually
a. In an approved safety can or storage cabinet away from heat sources - CORRECT
ANSWER- ✔✔Where should alcohol and other flammable chemicals be stored? a. In an
approved safety can or storage cabinet away from heat sources b. Under a hood and arranged
alphabetically for ease of identification in an emergency c. In a refrigerator at 28 C to 88 C to
reduce volatilization d. On a low shelf in an area protected from light
b. Improper disposal of phlebotomy equipment - CORRECT ANSWER- ✔✔The most
frequent cause of needle punctures is: a. Patient movement during venipuncture b. Improper
disposal of phlebotomy equipment c. Inattention during removal of needle after venipuncture
d. Failure to attach needle firmly to syringe or tube holder
c. A pregnant laboratory employee has asked whether she needs to be concerned about
working with a given reagent - CORRECT ANSWER- ✔✔Under which of the following
circumstances would a SDS be helpful? a. A phlebotomist has experienced a needle puncture
with a clean needle. b. A fire extinguisher failed during routine testing. c. A pregnant
laboratory employee has asked whether she needs to be concerned about working with a
given reagent. d. During a safety inspection, an aged microscope power supply is found to
have a frayed power cord
,b. Mary should have used a shield when opening the tube - CORRECT ANSWER- ✔✔It is a
busy evening in the City Hospital hematology department. One staff member called in sick,
and there was a major auto accident that has one staff member tied up in the blood bank all
evening. Mary, the medical laboratory scientist covering hematology, is in a hurry to get a stat
sample on the analyzer but needs to pour off an aliquot for another department. She is
wearing gloves and a lab coat. She carefully covers the stopper of the well-mixed
ethylenediaminetetraacetic acid (EDTA) tube with a gauze square and tilts the stopper toward
her so it opens away from her. She pours off about 1 mL into a prelabeled tube, replaces the
stopper of the EDTA tube, and puts it in the sample rack and sets it on the conveyor. She then
brings the poured sample off to the other department. How would you assess Mary's safety
practice? a. Mary was careful and followed all appropriate procedures. b. Mary should have
used a shield when opening the tube. c. Mary should have poured the sample into a sterile
tube. d. Mary should have wiped the tube with alcohol after replacing the stopper
b. Class B - CORRECT ANSWER- ✔✔What class fire extinguisher would be appropriate to
use on a fire in a chemical cabinet? a. Class A b. Class B c. Class C d. Class D
b. Made of cloth fabric that can be readily laundered - CORRECT ANSWER- ✔✔According
to OSHA standards, laboratory coats must be all of the following except: a. Water resistant b.
Made of cloth fabric that can be readily laundered c. Long-sleeved d. Worn fully buttoned
d. Budget for engineering controls and personal protective equipment - CORRECT
ANSWER- ✔✔Which one of the following would NOT be part of a safety management
plan? a. Job safety analysis b. Risk assessment of potential safety hazards c. Mechanism for
reporting accidents d. Budget for engineering controls and personal protective equipment
a. Wearing gloves - CORRECT ANSWER- ✔✔Which step in the CLSI procedure for
venipuncture is part of standard precautions? a. Wearing gloves b. Positively identifying the
patient c. Cleansing the site for the venipuncture d. Bandaging the venipuncture site
b. One inch, 21 gauge - CORRECT ANSWER- ✔✔Select the needle most commonly used in
standard venipuncture in an adult: a. One inch, 18 gauge b. One inch, 21 gauge c. One-half
inch, 23 gauge d. One-half inch, 25 gauge
b. No, although EDTA is used for hematologic testing, citrate, not heparin, is used for
coagulation testing. - CORRECT ANSWER- ✔✔For a complete blood count (hematology)
and measurement of prothrombin time (coagulation), the phlebotomist collected blood into
lavender stopper and green stopper tubes. Are these specimens acceptable? a. Yes, EDTA is
used for hematologic testing and heparin is used for coagulation testing. b. No, although
,EDTA is used for hematologic testing, citrate, not heparin, is used for coagulation testing. c.
No, although heparin is used for hematologic testing, citrate, not EDTA, is used for
coagulation testing. d. No, hematologic testing requires citrate and coagulation testing
requires a clot, so neither tube is acceptable
c. Median or median cubital, because it has the lowest risk of damaging nerves in the arm -
CORRECT ANSWER- ✔✔The vein of choice for performing a venipuncture is the: a.
Basilic, because it is the most prominent vein in the antecubital fossa b. Cephalic or
accessory cephalic, because it is the least painful site c. Median or median cubital, because it
has the lowest risk of damaging nerves in the arm d. One of the hand veins, because they are
most superficial and easily accessed
b. Identifying the patient - CORRECT ANSWER- ✔✔The most important step in
phlebotomy is: a. Cleansing the site b. Identifying the patient c. Selecting the proper needle
length d. Using the correct evacuated tube
b. Up and an angle of insertion less than 30 degrees - CORRECT ANSWER- ✔✔The
venipuncture needle should be inserted into the arm with the bevel facing: a. Down and an
angle of insertion between 15 and 30 degrees b. Up and an angle of insertion less than 30
degrees c. Down and an angle of insertion greater than 45 degrees d. Up and an angle of
insertion between 30 and 45 degrees
b. Tying the tourniquet too tightly - CORRECT ANSWER- ✔✔Failure to obtain blood by
venipuncture may occur because of all of the following except: a. Incorrect needle
positioning b. Tying the tourniquet too tightly c. Inadequate vacuum in the tube d. Collapsed
vein
d. Blood culture, coagulation, nonadditive, and gel separator or other additives - CORRECT
ANSWER- ✔✔What is the recommended order of draw when the evacuated tube system is
used? a. Gel separator, nonadditive, coagulation, and blood culture b. Additive, nonadditive,
gel separator, and blood culture c. Nonadditive, blood culture, coagulation, and other
additives d. Blood culture, coagulation, nonadditive, and gel separator or other additives
b. Lateral or medial plantar surface of the heel - CORRECT ANSWER- ✔✔Which one of the
following is an acceptable site for skin puncture on infants: a. Back curvature of the heel b.
Lateral or medial plantar surface of the heel c. Plantar surface of the heel close to the arch of
the foot d. Middle of the plantar surface of the heel
, c. Prevent the blood from clotting - CORRECT ANSWER- ✔✔An anticoagulant is an
additive placed in evacuated tubes to: a. Make the blood clot faster b. Dilute the blood before
testing c. Prevent the blood from clotting d. Ensure the sterility of the tube
c. Specimen in lavender stopper tube grossly hemolyzed - CORRECT ANSWER- ✔✔Which
one of the following is a reason for specimen rejection: a. Clot in a red stopper tube b.
Specimen collected for blood cortisol in the morning c. Specimen in lavender stopper tube
grossly hemolyzed d. Room number is missing from the specimen tube label
a. Breach of patient confidentiality - CORRECT ANSWER- ✔✔One legal area of concern
for the phlebotomist is: a. Breach of patient confidentiality b. Failure to obtain written
consent for phlebotomy c. Entering a patient's room when the family is present d. Asking an
outpatient for his or her full name in the process of identification
b. Achromatic - CORRECT ANSWER- ✔✔Use of which one of the following type of
objective lens causes the center of the microscope field to be in focus, whereas the periphery
is blurred? a. Plan achromatic b. Achromatic c. Plan apochromatic d. Flat field
c. Condenser - CORRECT ANSWER- ✔✔Which of the following gathers, organizes, and
directs light through the specimen? a. Eyepiece b. Objective lens c. Condenser d. Optical tube
a. Parfocal - CORRECT ANSWER- ✔✔After focusing a specimen by using the 403
objective, the laboratory professional switches to a 103 objective. The specimen remains in
focus at 103. Microscopes with this characteristic are described as: a. Parfocal b. Parcentric c.
Compensated d. Parachromatic
b. Plan apochromatic - CORRECT ANSWER- ✔✔Which objective has the greatest degree of
color correction? a. Achromatic b. Plan apochromatic c. Bichromatic d. Plan achromatic
c. Image of the field diaphragm iris is used to center the condenser - CORRECT ANSWER-
✔✔In adjusting the microscope light using Koehler illumination, which one of the following
is true? a. Condenser is first adjusted to its lowest position b. Height of the condenser is
adjusted by removing the eyepiece c. Image of the field diaphragm iris is used to center the
condenser d. Closing the aperture diaphragm increases the resolution of the image
