,
,• A 0.22-micron filter will remove - A) Particles with a diameter of 0.01 microns. B)
Particles with a diameter of 0.01 nanometers. C) Particles with a diameter of 2.2
microns. D) Only sodium chloride crystals. Answer: C
• The unit of resistivity is - A) Amperes. B) Volts. C) Coulombs. D) MΩ ∙ cm. Answer: D
• Microbiological impurities in source water are reported in which format? A) Colony
forming units per mL (Cfu/mL) B) Total organic carbon (TOC) in ng/g C) milligrams of
SiO2 D) Resistivity. Answer - A
• According to CLSI, the resistivity of clinical laboratory reagent water (CLRW) must be -
A) > 100 milliamps. B) < 10 millivolts. C) > 10 MΩ ∙ cm. D) < 10 MΩ ∙ cm. Answer: C
• Which of the following should not be storied in borosilicate glass because it will etch
the inside surface of the glass container? A) Saline B) Strong bases (caustics) C)
Clinical laboratory reagent water D) Weak acids Answer - B
• Ion-exchange filters remove which of the following from a water source? A) Ions to
reduce the mineral content of water B) Lead C) Organic solvents. D) Bacteria Answer -
A
• Activated carbon filters remove - A) Ions from water. B) Organic compounds from
water. C) Acids and bases from water. D) Large particulates from water. Answer: B
• Low actinic glassware has which of the following properties? A) High thermal
resistance with no color added to the glass B) Low thermal resistance with a green-
yellow color added as an integral part of the glass C) High thermal resistance with a
blue color added as an integral part of the glass D) High thermal resistance with an
amber or red color added as an integral part of the glass Answer - D
• Care must be taken before selecting polyethylene plastic for use as test tubes and
disposable transfer pipets because - A) Polyethylene can bind or absorb proteins, dyes,
stains, and picric acid. B) Polyethylene does not bind or absorb proteins, dyes, stains,
and picric acid. C) Polyethylene cannot be used to pipet serum. D) Polyethylene forms
insoluble salts in the presence of sodium chloride. Answer: A
• Which of the following classes of glassware, including pipets, is manufactured and
calibrated to deliver the most accurate volume of liquid? A) A B) B C) AA D) C Answer -
A
• A to deliver or TD pipet is designed to - A) Allow the user to remove a portion of the
sample in the tip for better accuracy. B) Be vigorously tapped against the test tube after
all the liquid is removed. C) Drain by gravity. D) Be refilled or rinsed out with the
appropriate solvent after the initial liquid has been drained from the pipet. Answer: C
, • Which of the following devices is used to calibrate laboratory thermometers? A)
Barometer B) Gallium melting point cell C) Titanium freezing point cell D) Platinum
cathode voltmeter Answer - B
• Convert 75 mg/dL to mg/L. A) 7.5 mg/L B) 75.0 mg/L C) 750 mg/L D) 7500 mg/L
Answer - C
• Convert 70.0 mg/dL glucose to mmol/L glucose. A) 3.89 mmol/L B) 38.9 mmol/L C)
70.0 mmol/L D) 389 mmol/L Answer - A
• If a thermometer reads 39°F, what is the equivalent degree Celsius (°C)? A) 0.39°C B)
3.9°C C) 39°C D) 40°C Answer - B
• Convert 200 picograms to grams. A) 2.0 × 10-10 grams B) 2.0 × 10-8 grams C) 20.0
grams D) 200 grams Answer - A
• A patient's calcium result is 8.0 mg/dL. Convert this result to mmol/L. A) 0.004 mmol/L
B) 0.20 mmol/L C) 2.0 mmol/L D) 20.0 mmol/L Answer - C
• The surface area of a laboratory bench measures 12 square feet. What is the surface
area in square meters? A) 1.115 square meters B) 11.15 square meters C) 111.5
square meters D) 1115 square meters Answer - A
• What is the weight in kilograms for a 24-hours stool specimen that weighs 0.50 pounds
? A) 0.0226 kilograms B) 0.2265 kilograms C) 2.265 kilograms D) 22.65 kilograms
Answer - B
• How much serum is required to make a 1 to 4 dilution with a total volume of 100.0 µL ?
A) 0.025 µL B) 0.25 µL C) 2.5 µL D) 25 µL Answer - D
• A patient's creatinine is outside the linear range of the analyzer; 10 µL of serum is
added to 90.0 µL of diluent and the diluted sample is reanalyzed. The creatinine value
of the diluted sample is 1.0 mg/dL. Which of the following creatinine values is correct?
A) 1.0 mg/dL B) 10.0 mg/dL C) 20.0 mg/dL D) 100 mg/dL Answer - B
• What is the dilution factor if 10 mL of sample is added to 190 mL of diluent? A) 10 B)
19 C) 20 D) 25 Answer - C
• A serum creatine kinase is diluted 1/200 with a result of 50 U/L. What is the patients'
actual creatine kinase result? A) 50 U/L B) 200 U/L C) 1000 U/L D) 10,000 U/L Answer -
D
• How many grams of sodium hydroxide (NaOH) are required to prepare 250 mL of a
1.00 molar (M) solution? A) 2.5 g B) 10.0 g C) 25.0 g D) 100 g Answer - B
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