BOC Urinalysis Exam-Questions with Correct Answers/ Verified
After receiving a 24-hour urine for quantitative total protein analysis, the technician must
first:
a. subculture the urine for bacteria
b. add the appropriate preservative
c. screen for albumin using a dipstick
d. measure the total volume - ✔✔d. measure the total volume
False results in urobilinogen testing may occur if the urine specimen is:
a. exposed to light
b. adjusted to a neutral pH
c. cooled to room temperature
d. collected in a nonsterile container - ✔✔a. exposed to light
A clean-catch urine is submitted to the laboratory for routine urinalysis and culture. The
routine urinalysis is done first, and 3 hours later, the specimen is sent to the microbiology
department for culture. The specimen should:
a. be centrifuged, and the supernatant cultured
b. be rejected due to the time delay
c. not be cultured if no bacteria are seen
d. be processed for culture only if the nitrate is positive - ✔✔b. be rejected due to the time
delay
Which of the following urine results is most apt to be changed by prolonged exposure to
light?
a. pH
b. protein
c. ketones
d. bilirubin - ✔✔d. bilirubin
,Urine samples should be examined within 1 hour of voiding because:
a. RBCs, leukocytes and casts agglutinate on standing for several hours at room temperature
b. urobilinogen increases and bilirubin decreases after prolonged exposure to light
c. bacterial contamination will cause alkalinization of the urine
d. ketones will increase due to bacterial and cellular metabolism - ✔✔c. bacterial
contamination will cause alkalinization of the urine
A urine specimen comes to the laboratory 7 hours after is obtained. It is acceptable for
culture only if the specimen has been stored:
a. at room temperature
b. at 4-7 degrees Celsius
c. frozen
d. with a preservative additive - ✔✔b. at 4-7 degrees Celsius
Which of the following would be affected by allowing a urine specimen to remain at room
temperature for 3 hours before analysis?
a. occult blood
b. specific gravity
c. pH
d. protein - ✔✔c. pH
Failure to observe RBC casts in a urine specimen can be caused by:
a. staining the specimen
b. centrifuging an unmixed specimen
c. mixing the sediment after decantation
d. examining the sediment first under low power - ✔✔b. centrifuging an unmixed specimen
The creatinine clearance is reported in:
a. mg/dL
b. mg/24 hours
, c. mL/min
d. mL/24 hours - ✔✔c. mL/min
Microalbumin can be measured by a random urine collection. An increased microalbumin is
predictive of:
a. diabetes mellitus
b. nephropathy
c. hypertension
d. nephrotic syndrome - ✔✔b. nephropathy
A patient with uncontrolled diabetes mellitus will most likely have:
a. pale urine with a high specific gravity
b. concentrated urine with a high specific gravity
c. pale urine with a low specific gravity
d. dark urine with a high specific gravity - ✔✔a. pale urine with a high specific gravity
While performing an analysis of a baby's urine, the technologist notices the specimen to
have a "mousy" odor. Of the following substances that may be excreted in urine, the one
that most characteristically produces this odor is:
a. phenylpyruvic acid
b. acetone
c. colliform baccili
d. porphyrin - ✔✔a. phenylpyruvic acid
Urine that develops a port wine color after standing may contain:
a. melanin
b. porphyrins
c. bilirubin
d. urobilinogen - ✔✔b. porphyrins
After receiving a 24-hour urine for quantitative total protein analysis, the technician must
first:
a. subculture the urine for bacteria
b. add the appropriate preservative
c. screen for albumin using a dipstick
d. measure the total volume - ✔✔d. measure the total volume
False results in urobilinogen testing may occur if the urine specimen is:
a. exposed to light
b. adjusted to a neutral pH
c. cooled to room temperature
d. collected in a nonsterile container - ✔✔a. exposed to light
A clean-catch urine is submitted to the laboratory for routine urinalysis and culture. The
routine urinalysis is done first, and 3 hours later, the specimen is sent to the microbiology
department for culture. The specimen should:
a. be centrifuged, and the supernatant cultured
b. be rejected due to the time delay
c. not be cultured if no bacteria are seen
d. be processed for culture only if the nitrate is positive - ✔✔b. be rejected due to the time
delay
Which of the following urine results is most apt to be changed by prolonged exposure to
light?
a. pH
b. protein
c. ketones
d. bilirubin - ✔✔d. bilirubin
,Urine samples should be examined within 1 hour of voiding because:
a. RBCs, leukocytes and casts agglutinate on standing for several hours at room temperature
b. urobilinogen increases and bilirubin decreases after prolonged exposure to light
c. bacterial contamination will cause alkalinization of the urine
d. ketones will increase due to bacterial and cellular metabolism - ✔✔c. bacterial
contamination will cause alkalinization of the urine
A urine specimen comes to the laboratory 7 hours after is obtained. It is acceptable for
culture only if the specimen has been stored:
a. at room temperature
b. at 4-7 degrees Celsius
c. frozen
d. with a preservative additive - ✔✔b. at 4-7 degrees Celsius
Which of the following would be affected by allowing a urine specimen to remain at room
temperature for 3 hours before analysis?
a. occult blood
b. specific gravity
c. pH
d. protein - ✔✔c. pH
Failure to observe RBC casts in a urine specimen can be caused by:
a. staining the specimen
b. centrifuging an unmixed specimen
c. mixing the sediment after decantation
d. examining the sediment first under low power - ✔✔b. centrifuging an unmixed specimen
The creatinine clearance is reported in:
a. mg/dL
b. mg/24 hours
, c. mL/min
d. mL/24 hours - ✔✔c. mL/min
Microalbumin can be measured by a random urine collection. An increased microalbumin is
predictive of:
a. diabetes mellitus
b. nephropathy
c. hypertension
d. nephrotic syndrome - ✔✔b. nephropathy
A patient with uncontrolled diabetes mellitus will most likely have:
a. pale urine with a high specific gravity
b. concentrated urine with a high specific gravity
c. pale urine with a low specific gravity
d. dark urine with a high specific gravity - ✔✔a. pale urine with a high specific gravity
While performing an analysis of a baby's urine, the technologist notices the specimen to
have a "mousy" odor. Of the following substances that may be excreted in urine, the one
that most characteristically produces this odor is:
a. phenylpyruvic acid
b. acetone
c. colliform baccili
d. porphyrin - ✔✔a. phenylpyruvic acid
Urine that develops a port wine color after standing may contain:
a. melanin
b. porphyrins
c. bilirubin
d. urobilinogen - ✔✔b. porphyrins
