Use the following key to answer questions 26 through 31:
a. 1
b. 3.5
c. 4
d. 6
e. 7
- 1,2, and 3 are correct
- 1 and 3 are correct
- 2 and 4 are correct
- only 4 is correct
- all are correct
- Which of the following statements about laboratory water are true?:
- Reagent grade water is obtained from Type III water which has been
polished with activated carbon, ion exchange resins, and a bacterial filter - Laboratory grade water is obtained by pumping tap water through a
selectively permeable membrane - Distillation removes organic impurities while deionization removes inorganic
impurities - Steam from boiled water is cooled and collected to make Type I water.
- Reagent grade water is obtained from Type III water which has been
- Volumetric pipets are used for which of the following situations?
- to pipet 2 mL saline for serial dilutions
- to pipet 5 mL of stock standard solution into a volumetric flask
- to pipet 2 mL of blood for a chromatographic extraction
- to pipet 0.5 mL solution from a 1 mL pipet
- Volumetric flasks are:
- used for approximate quantities
- not to be used for quantities below 100 mL
- used with refrigerated or non-refrigerated solutions
- never used as storage bottles
- TC on a pipet means “TO CONTAIN”. This pipet should be:
- blown out only
- drained only
- used only to deliver solution between two calibration marks on the pipet
- rinsed after delivery
- Pyrex laboratory glassware:
- is six times stronger than regular borosilicate
- has alkaline metals for strength
- is known for its heat and thermal shock resistance
- is made of over 96% silica giving it quartz-like qualities
- You are asked to make reagents for and run a new procedure. You have decided to use a
reagent that is labeled PG or practical grade that is on the Chemistry Lab’s stock shelves. When you have completed the test, the control values are too high. What should you do?:
- run the test again with a reagent blank vs. a water blank
- look for a chemical that is labeled “Technical Grade” and remake the reagent
- send out the results in spite of the control values since many times controls do not match hen new reagents are used
- remake the reagent with USP or NBS grade chemicals
- Safety regulations in the clinical laboratory fall under which government agency?
- Centers for Disease Control
- Food and Drug Administration
- National Institute of Laboratory Sciences
- Occupational Safety and Health Administration
- College of American Pathologists
- Gas Cylinders are securely fastened (chained, etc.) because:
- they are valuable and may be stolen.
- this prevents them from tipping over.
- this prevents the valves from shaking loose.
- this secures them in a known place
- the gas can be better controlled
- Universal precautions require that:
- all infectious material be labeled.
- all potentially infectious material be labeled.
- all body fluids be treated with equal precautions.
- serum and blood products must be separated.
- all body fluids must be labeled carefully.
- A vaccine is not available for which of the following infectious agents commonly encountered by laboratory personnel?
- hepatitis B
- human immunodeficiency virus
- polio virus
- influenza virus
- pneumonia virus
Use the following key to answer questions 36 and 37.
- 1,2, and 3 are correct
- 1 and 3 are correct
- 2 and 4 are correct
- only 4 is correct
- all are correct
- Mercury (Hg) used in the laboratory can be toxic by:
- contact of liquid Hg
- ingestion of liquid Hg
- breathing of volatile Hg fumes
- reaction with atmospheric O2 to form combustible material
- The following data should be obtained from a centrifuge for quality control of the instrument’s maintenance.
- nomogram RCF
- nominal RCF
- maximum g force
- revolutions per minute
Use the same key to answer questions as in questions 36 and 37.
- Elements of the Chemical Hygiene Plan include:
- Maintaining health records for 30 years after an employee terminates employment
- Maintaining copies of MSDSs in the laboratory director’s office
- The provision of personal protective equipment by the employer
- Storing chemicals in a single area, regardless of the toxicity
- Safety practices in the laboratory include:
- The lack of need to use safety glasses if corrective lenses are worn
- Not wearing contact lenses in the laboratory since they prevent proper washing of the eyes in the event of a spill
- Allowing sandals to be worn in the summer
- Flushing the eyes for 15 minutes in the event of contact with chemicals
- When considering latex allergy:
- There is no concern regarding the development of respiratory symptoms in some cases
- Powder-free latex gloves are safe to use for workers with latex allergy
- The allergy comes from the latex itself and never from the chemicals added to the latex during harvesting
- Latex proteins can be adsorbed onto the powder that is used on many gloves
- The requirements for operation of an electronic balance include:
- Placement in a vibration-free location
- Placement by a sunny window to ensure good lighting
- Verification of the optical zero
- Placement under an air conditioning vent to ensure a cool temperature
- Volumetric flasks:
- Should not be used as storage containers
- Contain an exact volume when filled to indicator line
- Are calibrated to be used at the temperature specified on the flask
- Can be used as transfer devices to deliver an exact amount of fluid
- c (p. 35-36)
- e (p. 36-37)
- a (p. 39)
- b (p. 35-36)
- c (p. 34-36)
- b (p. 7)
- b (p. 38-39)
- b (p. 39)
- d (p. 39)
- b (p. 39)
- c (p. 34-35)
- b (p. 36-37)
- c (p. 35)
- b (p. 35-36)
- c (p. 35-36)
- b (p. 37-38)
- b (p. 36-37)
- e (p. 36-37)
- e (p. 34-35)
- c (p. 35)
- d (p. 34)
- d (p. 34)
- e (p. 35-37)
- d (p. 34)
- b (p. 35-37)
- a (p. 5-6)
- a (p. 14,17)
- d (p. 13)
- d (p. 14)
- d (p. 10)
- d (p. 9)
- d (p. 26)
- c (p. 28)
- c (p. 31-33)
- b (p.33)
- a (p. 30)
- d (p. 24-25)
- b (p. 27-29)
- d (p. 28)
- d (p. 33-34)
- b (p. 21-22)
- a (p. 13)