Deck 7: Safety and Specimen Preparation

Question 1

Which series of dilutions would be best in order to make a 1:3000 dilution?

A) 1:10,1:3,1:10
B) 1:5,1:6,1:100
C) 1:3,1:100,1:100
D) 1:30,1:10,1:100

Answer 1

1:5,1:6,1:100

Question 2

If 0.9 mL of saline is added to 0.1 mL of serum,what does the 0.9 mL represent?

A) the final dilution
B) the diluent
C) the solute
D) the total solution

Answer 2

the diluent

Question 3

Information on any potentially toxic substance used in a laboratory test kit would be found in:

A) OSHA's Occupational Exposure to Bloodborne Pathogens Standard
B) chemical hygiene plan
C) material safety data sheet
D) exposure control plan

Answer 3

material safety data sheet

Question 4

Use of universal precautions is best explained by which of the following?

A) handling a urine specimen from a patient with a bacterial infection very carefully
B) wearing gloves in handling a serum specimen from a patient with HIV
C) taking gloves off in the lab to place a serum specimen in a chemistry analyzer
D) treating every specimen in the lab as if it were infectious

Question 5

If you want to make 4 mL of a 1:20 dilution,how much serum would be needed?

A) 0.2 mL
B) 2 mL
C) 0.5 mL
D) 1 mL

Question 6

On a serial dilution with the following tubes set up,1:2,1:4,1:8,1:16,1:32,and 1:64,there is no visible agglutination in the 1:64 tube.What is the titer of the antibody?

A) 32
B) 16
C) 64
D) cannot determine

Question 7

When 0.5 mL of serum is added to 1.5 mL of diluent,what dilution does this represent?

A) 1:3
B) 1:4
C) 1:5
D) 3:1

Question 8

Which of the following should be part of a chemical hygiene plan?

A) appropriate work practices
B) engineering controls such as fume hoods
C) employee training
D) all of the above

Question 9

Which of the following is part of the federal Occupational Exposure to Bloodborne Pathogens Standard Act ?

A) All employees must practice universal precautions at all times.
B) Only workers who come in contact with patients need to wear gloves.
C) Taking a cup of coffee into the lab is okay as long as it doesn't spill.
D) A blood spill can be mopped up at the end of the day.

Question 10

Which of the following applies to recapping of needles?

A) It can be done carefully as long as gloves are worn.
B) A sheath can be placed back on the needle with the other hand.
C) Transport needles back to the lab for disposal.
D) Never manually recap a needle.

Question 11

When a staphylococcal infection is passed between patients due to health-care workers not washing their hands,this represents an example of:

A) lack of chemical hygiene
B) a sharps hazard
C) the chain of infection
D) a specimen transport problem