chem boc questions chapters 1 and 2

CAP requires refrigerator temperatures to be recorded

daily

A paper or electronic report of lab results must include

the name and address of testing lab

CAP requires that glassware cleaning practices include periodic testing for

detergents

An automated assay gives a reading above the limits of linearity. A dilution of the serum sample is made by adding 1 mL of serum to 9 mL of water. The instrument now reads 350 U/L. The report on the undiluted serum should be

3500

The common unit of measure for a standard solution is

mg/mL

A technician is asked to prepare of standard solution from the stock standard. What is the glassware of choice for this solution?

volumetric flask

How many mL of RBCs are used to make 25 mL of a 4% red cell suspension

1mL

The volume of 25% stock sulfosalicylic acid needed to prepare 100mL of 5% working solution is

20 mL

To prepare 24 mL of 3% acetic acid, how much glacial acetic acid is needed

0.75 mL

How many grams of sodium chloride are needed to prepare 1L of 0.9% normal saline

9

To prepare 40mL of a 3% working solution, a tech would use what volume of stock solution

1.2 mL

A tech is preparing a 75% solution. What volume of stock solution should be used to prepare 8 mL

6 mL

When 0.25 mL is diluted to 20 mL, the resulting dilution is

1:80

When the exact concentration of the solute of a solution is known and is used to evaluate the concentration of an unknown solution, the known solution is

standard

A 1:5 dilution using saline (A) was made. This dilution was tested and was too high to read. A 1:2 dilution (B) was made using saline. To calculate the result, dilution B value must be multiplied by

10

A spinal fluid specimen is diluted to 1 part spinal fluid to 3 parts saline to obtain a new result low enough to measure. To calculate protein concentration, the result must be

multiplied by 4

How many mL of reagent are needed to prepare 5 mL of a 1:25 dilution

0.2

to make 1L of 1N NaOH from 1.025N NaOH solution, how many mL of the NaOH should be used

975.6

If 0.5 mL of a 1:300 silution contains 1 antigenic unit, 2 antigenic units would be contained in 0.5 mL of a dilution of

1:150

A 2% saline erythrocyte suspension contains how many mL of packed erythrocytes per 5 mL of isotonic saline solution

0.1

a 600 mg/bL glucose protein is diluted 1:30, the concentration of the final solution in mg/dL is

20

How many ml of 30% bovine albumin are needed to make 6 mL of a 10% albumin solution

2

A colorimetric method calls for the use of 0.1mL of serum, 5mL of reagent, and 4.9mL of water. What is the dilution of the serum in the final solution

1:100

4mL of water are added to 1mL of serum, this represents which dilution

1:5