BOC Urinalysis Study Guide Questions With
Answers 100% Correct
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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-a. pale urine with a high specific
gravity
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☑️Correct Ans-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☑️Correct Ans-a. exposed to light
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☑️Correct Ans-a. phenylpyruvic acid
Urine that develops a port wine color after standing may contain:
a. melanin
b. porphyrins
c. bilirubin
d. urobilinogen☑️Correct Ans-b. porphyrins
Answers 100% Correct
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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-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☑️Correct Ans-a. pale urine with a high specific
gravity
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☑️Correct Ans-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☑️Correct Ans-a. exposed to light
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☑️Correct Ans-a. phenylpyruvic acid
Urine that develops a port wine color after standing may contain:
a. melanin
b. porphyrins
c. bilirubin
d. urobilinogen☑️Correct Ans-b. porphyrins
