CSMLS PRACTICE EXAM #2 QUESTIONS
AND ANSWERS
When should you stop flushing your eyes following a splash of sulfuric acid? - Correct
Answers -After 15 minutes
What should you do if you find a dry picric acid reagent? - Correct Answers -Call the
waste disposal experts
What reagent is used to neutralize silver amine? - Correct Answers -Sodium chloride
The American Conference of Governmental Industrial Hygienists (ACGIH) classifies
carcinogens into 5 groups. How is formaldehyde classified? - Correct Answers -
Suspected human carcinogen
What is the most likely route of transmission of HIV from a blood specimen to laboratory
personnel? - Correct Answers -Accidental needlestick
What is the proper procedure to follow if blood tubes break during centrifugation? -
Correct Answers -Turn off the centrifuge and leave closed for 30 minutes before
disinfecting the bowl and buckets
Which of the following characteristics applies to sodium hypochlorite? - Correct Answers
-Corrosive to metals
Which of the following disinfectants contains alcohol? - Correct Answers -An idiophor
Which of the following locations is best for conducting work involving the release of
vapours? - Correct Answers -Laboratory fume hood
Oxidizing chemicals must NOT be stored with which of the following? - Correct Answers
-Flammables
Which of the following will provide the most protection from diseases spread by airborne
transmission? - Correct Answers -N95 respirator
Pre-work check lists are what kind of hazard control? - Correct Answers -Procedural
design
,Which of the following describes the correct operation of a biological safety cabinet? -
Correct Answers -Turn the blower on at least 5 minutes prior to use
Administrative controls depend on which of the following to be effective? - Correct
Answers -Safe work practices
Which is the proper means of disposal for the type of waste cited? - Correct Answers -
Biohazardous wastes- by incineration
If a blood specimen is spilled on a lab bench, the first step in clean up should be -
Correct Answers -Absorb blood with disposable towels
What is the anticoagulant of choice for hematology smear assessments? - Correct
Answers -Tripotassium EDTA
How long may a specimen be used for compatibility testing, if the patient's history is
unknown? - Correct Answers -3 days
What is the purpose of sodium polyanethol sulphonate in blood specimens for bacterial
culture? - Correct Answers -Anticoagulant
A serum specimen was aliquoted for electrolyte analysis and left uncovered in a 1 mL
analyzer cup for 6 hours at room temperature. What affect will this have on the
specimen? - Correct Answers -Increased Na, increased K, increased Cl, and decreased
CO₂
Whole blood clotted samples were left unprocessed at room temperature for one hour.
What affect would this have on the glucose results? - Correct Answers -Decreased
glucose result by 7%
What procedure would be most appropriate to follow, should a skin biopsy specimen
arrive from a doctor's office without a fixative? - Correct Answers -Document the
condition of the specimen as received, add fixative, and process
Which number is used to identify a biopsy specimen throughout tissue processing? -
Correct Answers -Laboratory surgical number
Which substance could be added to counteract the effects of heparin in samples of
blood collected from patients on this anticoagulant? - Correct Answers -Protamine
sulphate
Which of the following is used to cleanse the finger before performing a capillary
puncture? - Correct Answers -70% isopropyl alcohol
Prior to culture, CSF should be stored under which conditions? - Correct Answers -
Room temperature
, In order to diagnose whooping cough, which type of specimen should be collected? -
Correct Answers -Nasopharyngeal
When performing a venipuncture, the correct order of draw is? - Correct Answers -Plain
red top, blue top, SST, purple top, and grey top
The correct order of draw for blood culture tubes is - Correct Answers -Always drawn
first
How many mL of 30% v/v albumin reagent are needed to prepare 50 mL of a 21%
albumin reagent? The diluent is deionized water - Correct Answers -35 mL of albumin
and 15 mL of deionized water
What is the bacteriostatic agent added to most antisera? - Correct Answers -0.1%
sodium azide
What is the concentration of a 2M solution of sulphuric acid? (H=1, S=32, O=16) -
Correct Answers -196 g/L
What are the minimum monitoring requirements of a blood bank refrigerator used to
store blood products? - Correct Answers -Every four hours
When the field of view is only partly illuminated in bright field microscopy, the most likely
cause is? - Correct Answers -Objective improperly positioned
In the preparation of an accurate reagent, which item is the most useful? - Correct
Answers -A volumetric flask
What is the most commonly performed test to assess lab water purity? - Correct
Answers -Measurement of electrical resistance
An antibody that is too concentrated may cause which of the following false results? -
Correct Answers -False negative due to the prozone phenomenon
What is done to blood products to prevent GVHD? - Correct Answers -Irradiation
What type of immunity would a nursing newborn have? - Correct Answers -Natural,
passive
What IgG subclasses of Rh antibodies are most significant? - Correct Answers -IgG 1
and IgG 3
Clinical significance of Major Histocompatibility Antigens includes all of the following,
except - Correct Answers -Blood grouping
AND ANSWERS
When should you stop flushing your eyes following a splash of sulfuric acid? - Correct
Answers -After 15 minutes
What should you do if you find a dry picric acid reagent? - Correct Answers -Call the
waste disposal experts
What reagent is used to neutralize silver amine? - Correct Answers -Sodium chloride
The American Conference of Governmental Industrial Hygienists (ACGIH) classifies
carcinogens into 5 groups. How is formaldehyde classified? - Correct Answers -
Suspected human carcinogen
What is the most likely route of transmission of HIV from a blood specimen to laboratory
personnel? - Correct Answers -Accidental needlestick
What is the proper procedure to follow if blood tubes break during centrifugation? -
Correct Answers -Turn off the centrifuge and leave closed for 30 minutes before
disinfecting the bowl and buckets
Which of the following characteristics applies to sodium hypochlorite? - Correct Answers
-Corrosive to metals
Which of the following disinfectants contains alcohol? - Correct Answers -An idiophor
Which of the following locations is best for conducting work involving the release of
vapours? - Correct Answers -Laboratory fume hood
Oxidizing chemicals must NOT be stored with which of the following? - Correct Answers
-Flammables
Which of the following will provide the most protection from diseases spread by airborne
transmission? - Correct Answers -N95 respirator
Pre-work check lists are what kind of hazard control? - Correct Answers -Procedural
design
,Which of the following describes the correct operation of a biological safety cabinet? -
Correct Answers -Turn the blower on at least 5 minutes prior to use
Administrative controls depend on which of the following to be effective? - Correct
Answers -Safe work practices
Which is the proper means of disposal for the type of waste cited? - Correct Answers -
Biohazardous wastes- by incineration
If a blood specimen is spilled on a lab bench, the first step in clean up should be -
Correct Answers -Absorb blood with disposable towels
What is the anticoagulant of choice for hematology smear assessments? - Correct
Answers -Tripotassium EDTA
How long may a specimen be used for compatibility testing, if the patient's history is
unknown? - Correct Answers -3 days
What is the purpose of sodium polyanethol sulphonate in blood specimens for bacterial
culture? - Correct Answers -Anticoagulant
A serum specimen was aliquoted for electrolyte analysis and left uncovered in a 1 mL
analyzer cup for 6 hours at room temperature. What affect will this have on the
specimen? - Correct Answers -Increased Na, increased K, increased Cl, and decreased
CO₂
Whole blood clotted samples were left unprocessed at room temperature for one hour.
What affect would this have on the glucose results? - Correct Answers -Decreased
glucose result by 7%
What procedure would be most appropriate to follow, should a skin biopsy specimen
arrive from a doctor's office without a fixative? - Correct Answers -Document the
condition of the specimen as received, add fixative, and process
Which number is used to identify a biopsy specimen throughout tissue processing? -
Correct Answers -Laboratory surgical number
Which substance could be added to counteract the effects of heparin in samples of
blood collected from patients on this anticoagulant? - Correct Answers -Protamine
sulphate
Which of the following is used to cleanse the finger before performing a capillary
puncture? - Correct Answers -70% isopropyl alcohol
Prior to culture, CSF should be stored under which conditions? - Correct Answers -
Room temperature
, In order to diagnose whooping cough, which type of specimen should be collected? -
Correct Answers -Nasopharyngeal
When performing a venipuncture, the correct order of draw is? - Correct Answers -Plain
red top, blue top, SST, purple top, and grey top
The correct order of draw for blood culture tubes is - Correct Answers -Always drawn
first
How many mL of 30% v/v albumin reagent are needed to prepare 50 mL of a 21%
albumin reagent? The diluent is deionized water - Correct Answers -35 mL of albumin
and 15 mL of deionized water
What is the bacteriostatic agent added to most antisera? - Correct Answers -0.1%
sodium azide
What is the concentration of a 2M solution of sulphuric acid? (H=1, S=32, O=16) -
Correct Answers -196 g/L
What are the minimum monitoring requirements of a blood bank refrigerator used to
store blood products? - Correct Answers -Every four hours
When the field of view is only partly illuminated in bright field microscopy, the most likely
cause is? - Correct Answers -Objective improperly positioned
In the preparation of an accurate reagent, which item is the most useful? - Correct
Answers -A volumetric flask
What is the most commonly performed test to assess lab water purity? - Correct
Answers -Measurement of electrical resistance
An antibody that is too concentrated may cause which of the following false results? -
Correct Answers -False negative due to the prozone phenomenon
What is done to blood products to prevent GVHD? - Correct Answers -Irradiation
What type of immunity would a nursing newborn have? - Correct Answers -Natural,
passive
What IgG subclasses of Rh antibodies are most significant? - Correct Answers -IgG 1
and IgG 3
Clinical significance of Major Histocompatibility Antigens includes all of the following,
except - Correct Answers -Blood grouping
