CSMLS CHEMISTRY + HEMATOLOGY
QUESTIONS WITH CORRECT ANSWERS||
MULTIPLE CHOICES|| GRADED A+||
LATEST UPDATE 2026
Which of the following ionization techniques is preferred for trace elements?
a. matrix assisted laser desorption
b. inductively coupled plasma
c. electrospray
d. chemical -CORRECTANSWER b. inductively coupled plasma (mass spec)
*trace element & heavy metal analysis
Which of the following factors may cause an albumin result to fail a delta check flag
when using the bromocresol green method?
a. patient was recumbent during venipuncture
b. specimen was collected in Li heparin
c. specimen was icteric
d. patient was not fasting -CORRECTANSWER a. patient recumbent during
venipuncture
(same as having tourniquet on too long >1 min cause hemoconcentration)
Which of the following requirements must be induced in the setup of a lab info system?
a. specimen assigned a unique barcode label
,b. instrumentation interfaced with the lis
c. lis interfaced to electronic medical record
d. identification code and password to each user -CORRECTANSWER d. identification
code and password to each user
(security & privacy always primary requirement)
Which of the following components is responsible for autoverification?
a. server
b. output device
c. analyzer
d. middleware -CORRECTANSWER d. middleware
Which of the following factors is most likely to cause a falsely increased creatinine
clearance result in a 24 hr urine specimen?
a. including first morning voided urine in sample collection
b. using mid-stream voided urine fo the sample collection
c. failing to include the last voided urine at the end of the sample collection
d. failing to include some of the urine during sample collection -CORRECTANSWER a.
What is the effect on sodium quality control results if the calibration standards are over-
diluted?
a. decreased imprecision
b. positive shift
,c. negative shift
d. increased imprecision -CORRECTANSWER b
(over diluting cal = read lower = less steep curve)
What is the molal freezing point of a sample with an osmolality of 403 mOsm/Kg?
a. -0.075C
b. -0.75C
c. 0.075C
d. 0.75C -CORRECTANSWER b. -0.75C
403 X (-1.86C/1Osm) X (1Osm/1000mOsm) = -0.75
Which of the following conditions correlates with a plasma phosphorus of 0.35 mmol/L?
a. rhabdomyolysis
b. acromegaly
c. hypoparathyroidism
d. DKA -CORRECTANSWER d. DKA
Which of the following ionization methods may be used for liquid chromatography mass
spectrometry?
a. inductively coupled plasma
b. electrospray
c. electron
, d. MALDI -CORRECTANSWER b. electrospray
Given a serum chloride of 30 mmol/L what is the expected chloride level in the CSF?
a. 30 mmol/L
b. 20 mmol/L
c. 50 mmol/L
d. 10 mmol/L -CORRECTANSWER c. 50 mmol/L
**CSF chloride is 20 mmol/L higher than serum chloride levels
(Sodium is the same in serum and CSF)
Factors that contribute to a PCO2 electrode requiring 60-120 sec. to reach equilibrium
include:
a. diffusion characteristics of the membrane
b. actual blood PO2
c. type of calibrating standard
d. potential of the polarizing mercury cell -CORRECTANSWER a
An emphysema patient suffering from fluid accumulation in the alveolar spaces is likely
to be in what metabolic state?
a. respiratory acidosis
b. respiratory alkalosis
c. metabolic acidosis
d. metabolic alkalosis -CORRECTANSWER a
QUESTIONS WITH CORRECT ANSWERS||
MULTIPLE CHOICES|| GRADED A+||
LATEST UPDATE 2026
Which of the following ionization techniques is preferred for trace elements?
a. matrix assisted laser desorption
b. inductively coupled plasma
c. electrospray
d. chemical -CORRECTANSWER b. inductively coupled plasma (mass spec)
*trace element & heavy metal analysis
Which of the following factors may cause an albumin result to fail a delta check flag
when using the bromocresol green method?
a. patient was recumbent during venipuncture
b. specimen was collected in Li heparin
c. specimen was icteric
d. patient was not fasting -CORRECTANSWER a. patient recumbent during
venipuncture
(same as having tourniquet on too long >1 min cause hemoconcentration)
Which of the following requirements must be induced in the setup of a lab info system?
a. specimen assigned a unique barcode label
,b. instrumentation interfaced with the lis
c. lis interfaced to electronic medical record
d. identification code and password to each user -CORRECTANSWER d. identification
code and password to each user
(security & privacy always primary requirement)
Which of the following components is responsible for autoverification?
a. server
b. output device
c. analyzer
d. middleware -CORRECTANSWER d. middleware
Which of the following factors is most likely to cause a falsely increased creatinine
clearance result in a 24 hr urine specimen?
a. including first morning voided urine in sample collection
b. using mid-stream voided urine fo the sample collection
c. failing to include the last voided urine at the end of the sample collection
d. failing to include some of the urine during sample collection -CORRECTANSWER a.
What is the effect on sodium quality control results if the calibration standards are over-
diluted?
a. decreased imprecision
b. positive shift
,c. negative shift
d. increased imprecision -CORRECTANSWER b
(over diluting cal = read lower = less steep curve)
What is the molal freezing point of a sample with an osmolality of 403 mOsm/Kg?
a. -0.075C
b. -0.75C
c. 0.075C
d. 0.75C -CORRECTANSWER b. -0.75C
403 X (-1.86C/1Osm) X (1Osm/1000mOsm) = -0.75
Which of the following conditions correlates with a plasma phosphorus of 0.35 mmol/L?
a. rhabdomyolysis
b. acromegaly
c. hypoparathyroidism
d. DKA -CORRECTANSWER d. DKA
Which of the following ionization methods may be used for liquid chromatography mass
spectrometry?
a. inductively coupled plasma
b. electrospray
c. electron
, d. MALDI -CORRECTANSWER b. electrospray
Given a serum chloride of 30 mmol/L what is the expected chloride level in the CSF?
a. 30 mmol/L
b. 20 mmol/L
c. 50 mmol/L
d. 10 mmol/L -CORRECTANSWER c. 50 mmol/L
**CSF chloride is 20 mmol/L higher than serum chloride levels
(Sodium is the same in serum and CSF)
Factors that contribute to a PCO2 electrode requiring 60-120 sec. to reach equilibrium
include:
a. diffusion characteristics of the membrane
b. actual blood PO2
c. type of calibrating standard
d. potential of the polarizing mercury cell -CORRECTANSWER a
An emphysema patient suffering from fluid accumulation in the alveolar spaces is likely
to be in what metabolic state?
a. respiratory acidosis
b. respiratory alkalosis
c. metabolic acidosis
d. metabolic alkalosis -CORRECTANSWER a
