Question 1

What is the concentration (g/dL) of a 1/10 dilution of a 12% NaCl solution?

Accepted Answer

A)  0.12 
B)  1.20 
C)  12.0 
D)  120.0 
A)  0.12 
B)  1.20 
C)  12.0 
D)  120.0

Question 2

Which of the following devices is used to calibrate laboratory thermometers?

Accepted Answer

A)  Barometer 
B)  Gallium melting point cell 
C)  Titanium freezing point cell 
D)  Platinum cathode voltmeter 
A)  Barometer 
B)  Gallium melting point cell 
C)  Titanium freezing point cell 
D)  Platinum cathode voltmeter

Question 3

If a thermometer reads 39°F, what is the equivalent degree Celsius (°C)?

Accepted Answer

A)  0.39°C 
B)  3.9°C 
C)  39°C 
D)  40°C 
A)  0.39°C 
B)  3.9°C 
C)  39°C 
D)  40°C

Question 4

Which of the following should not be storied in borosilicate glass because it will etch the inside surface of the glass container?

Accepted Answer

A)  Saline 
B)  Strong bases (caustics) 
C)  Clinical laboratory reagent water 
D)  Weak acids 
A)  Saline 
B)  Strong bases (caustics) 
C)  Clinical laboratory reagent water 
D)  Weak acids

Question 5

What is the molarity of a 20.0% w/v glucose solution?

Accepted Answer

A)  0.111 molar 
B)  1.11 molar 
C)  2.22 molar 
D)  11.1 molar 
A)  0.111 molar 
B)  1.11 molar 
C)  2.22 molar 
D)  11.1 molar

Question 6

A barium chloride solution is prepared by transferring 20 g of barium chloride to 1.0 liters of water. Calculate the chloride concentration in milliequivalents per liter of this solution.

Accepted Answer

A)  1.92 mEq Cl/L 
B)  19.2 mEq Cl/L 
C)  192.0 mEq Cl/L 
D)  384 mEq Cl/L 
A)  1.92 mEq Cl/L 
B)  19.2 mEq Cl/L 
C)  192.0 mEq Cl/L 
D)  384 mEq Cl/L

Question 7

How much serum is required to make a 1 to 4 dilution with a total volume of 100.0 µL ?

Accepted Answer

A)  0.025 µL 
B)  0.25 µL 
C)  2.5 µL 
D)  25 µL 
A)  0.025 µL 
B)  0.25 µL 
C)  2.5 µL 
D)  25 µL

Question 8

Convert 75 mg/dL to mg/L.

Accepted Answer

A)  7.5 mg/L 
B)  75.0 mg/L 
C)  750 mg/L 
D)  7500 mg/L 
A)  7.5 mg/L 
B)  75.0 mg/L 
C)  750 mg/L 
D)  7500 mg/L

Question 9

What is the concentration in mg/dL of a 140 mEq/L sodium standard?

Accepted Answer

A)  0.323 mg/dL 
B)  3.23 mg/dL 
C)  32.3 mg/dL 
D)  322 mg/dL 
A)  0.323 mg/dL 
B)  3.23 mg/dL 
C)  32.3 mg/dL 
D)  322 mg/dL

Question 10

How many grams of sodium hydroxide (NaOH) are required to prepare 250 mL of a 1.00 molar (M) solution?

Accepted Answer

A)  2.5 g 
B)  10.0 g 
C)  25.0 g 
D)  100 g 
A)  2.5 g 
B)  10.0 g 
C)  25.0 g 
D)  100 g

Question 11

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?

Accepted Answer

A)  1.0 mg/dL 
B)  10.0 mg/dL 
C)  20.0 mg/dL 
D)  100 mg/dL 
A)  1.0 mg/dL 
B)  10.0 mg/dL 
C)  20.0 mg/dL 
D)  100 mg/dL

Question 12

The surface area of a laboratory bench measures 12 square feet. What is the surface area in square meters?

Accepted Answer

A)  1.115 square meters 
B)  11.15 square meters 
C)  111.5 square meters 
D)  1115 square meters 
A)  1.115 square meters 
B)  11.15 square meters 
C)  111.5 square meters 
D)  1115 square meters

Question 13

Which of the following classes of glassware, including pipets, is manufactured and calibrated to deliver the most accurate volume of liquid?

Accepted Answer

A)  A 
B)  B 
C)  AA 
D)  C 
A)  A 
B)  B 
C)  AA 
D)  C

Question 14

Convert 145 mEq/L sodium concentration to mmol Na+/L.

Accepted Answer

A)  14.5 mmol Na+/L 
B)  145 mmol Na+/L 
C)  167 mmol Na+/L 
D)  333 mmol Na+/L 
A)  14.5 mmol Na+/L 
B)  145 mmol Na+/L 
C)  167 mmol Na+/L 
D)  333 mmol Na+/L

What is the concentration (g/dL) of a 1/10 dilution of a 12% NaCl solution?

Which of the following devices is used to calibrate laboratory thermometers?

If a thermometer reads 39°F, what is the equivalent degree Celsius (°C)?

Which of the following should not be storied in borosilicate glass because it will etch the inside surface of the glass container?

What is the molarity of a 20.0% w/v glucose solution?

A barium chloride solution is prepared by transferring 20 g of barium chloride to 1.0 liters of water. Calculate the chloride concentration in milliequivalents per liter of this solution.

How much serum is required to make a 1 to 4 dilution with a total volume of 100.0 µL ?

Convert 75 mg/dL to mg/L.

What is the concentration in mg/dL of a 140 mEq/L sodium standard?

How many grams of sodium hydroxide (NaOH) are required to prepare 250 mL of a 1.00 molar (M) solution?

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?

The surface area of a laboratory bench measures 12 square feet. What is the surface area in square meters?

Which of the following classes of glassware, including pipets, is manufactured and calibrated to deliver the most accurate volume of liquid?

Convert 145 mEq/L sodium concentration to mmol Na⁺/L.

Safety in the Clinical Chemistry Laboratory

Laboratory Statistics, Method Development and QC

Instrumentation, Laboratory Automation, and Informatics

Immunoassays

Molecular Diagnostics

Carbohydrates

Lipids

Proteins

Enzymes

Nonprotein Nitrogen Questions

Body Water and Electrolyte Homeostasis

Blood Gases, PH, and Acid-Base Balance

Mineral and Bone Metabolism

The Endocrine System

Gastrointestinal Function

Pancreas

Cardiac Function

Liver

Iron, Porphyrins, and Hemoglobin

Therapeutic Drug Monitoring

Toxic Substances

Nutrition and Vitamins

Tumor Markers

Geriatrics

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Filters

Exam 1: Laboratory Basics

What is the concentration (g/dL) of a 1/10 dilution of a 12% NaCl solution?

Which of the following devices is used to calibrate laboratory thermometers?

If a thermometer reads 39°F, what is the equivalent degree Celsius (°C)?

Which of the following should not be storied in borosilicate glass because it will etch the inside surface of the glass container?

What is the molarity of a 20.0% w/v glucose solution?

A barium chloride solution is prepared by transferring 20 g of barium chloride to 1.0 liters of water. Calculate the chloride concentration in milliequivalents per liter of this solution.

How much serum is required to make a 1 to 4 dilution with a total volume of 100.0 µL ?

Convert 75 mg/dL to mg/L.

What is the concentration in mg/dL of a 140 mEq/L sodium standard?

How many grams of sodium hydroxide (NaOH) are required to prepare 250 mL of a 1.00 molar (M) solution?

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?

The surface area of a laboratory bench measures 12 square feet. What is the surface area in square meters?

Which of the following classes of glassware, including pipets, is manufactured and calibrated to deliver the most accurate volume of liquid?

Convert 145 mEq/L sodium concentration to mmol Na+/L.

Safety in the Clinical Chemistry Laboratory

Laboratory Statistics, Method Development and QC

Instrumentation, Laboratory Automation, and Informatics

Immunoassays

Molecular Diagnostics

Carbohydrates

Lipids

Proteins

Enzymes

Nonprotein Nitrogen Questions

Body Water and Electrolyte Homeostasis

Blood Gases, PH, and Acid-Base Balance

Mineral and Bone Metabolism

The Endocrine System

Gastrointestinal Function

Pancreas

Cardiac Function

Liver

Iron, Porphyrins, and Hemoglobin

Therapeutic Drug Monitoring

Toxic Substances

Nutrition and Vitamins

Tumor Markers

Geriatrics

Pediatrics

Filters

Convert 145 mEq/L sodium concentration to mmol Na⁺/L.