Question 1

The purest grade of chemicals used in the preparation of reagents is ____ grade.&#10;A) analytic (AR)&#10;B) chemically pure (CP)&#10;C) United States Pharmacopeia (USP) and National Formulary (NF)&#10;D) technical or commercial

Accepted Answer

Analytic reagent (AR)grade chemicals are of a high degree of purity and are used often in the preparation of reagents in the clinical laboratory.Chemically pure (CP)grade are sufficiently pure to be used in many analyses in the clinical laboratory; they may not be acceptable for research and various clinical laboratory techniques unless they have been specifically analyzed for the desired procedure.USP and NF grade are generally less pure than CP grade.Technical or commercial grade chemicals are used only for industrial purposes and are generally not used in the preparation of reagents for the clinical laboratory.

Question 2

The labels on bottles should include:&#10;A) the name and concentration of the reagent.&#10;B) the date on which the reagent was prepared.&#10;C) the initials of the person who made the reagent.&#10;D) all of the above.

Accepted Answer

All labels on bottles should include the name and concentration of the reagent,the date on which the reagent was prepared,and the initials of the person who made the reagent.

Question 3

The purpose of a material safety data sheet (MSDS)is to provide information about:&#10;A) possible hazards.&#10;B) safe handling instructions.&#10;C) storage and disposal of the specific chemical that it accompanies.&#10;D) all of the above.

Accepted Answer

An MSDS accompanies the shipment of all hazardous chemicals and should be available in the laboratory for anyone to review.The MSDS contains information about possible hazards,safe handling,storage,and disposal of the particular chemical it accompanies.

Question 4

A pipette that has been calibrated to deliver a fixed volume of liquid by drainage is known as ____ pipette.&#10;A) a volumetric&#10;B) a serologic&#10;C) a graduated&#10;D) both b and c

Accepted Answer

For most general laboratory use,there are two main types of manual pipettes: the volumetric (or transfer)pipette and the graduated (or measuring)pipette.A pipette that has been calibrated to deliver a fixed volume of liquid by drainage is known as a volumetric,or transfer pipette.These pipettes consist of a cylindrical bulb joined at both ends to narrow glass tubing.Graduated pipettes are another way to deliver a particular amount of liquid,but this pipette delivers the amount of liquid contained between two calibration marks on a cylindrical tube,or pipette.Another pipette used in the laboratory is the serologic pipette.It is much like the graduated pipette in appearance.

Question 5

The purest grade of reagent water is:&#10;A) deionized.&#10;B) type I.&#10;C) type II.&#10;D) type III.

Accepted Answer

Type I reagent water is the most pure form of water and should be used for procedures that require maximum water purity.Type II reagent water is used for general laboratory tests that do not require type I water.Type III reagent water can be used for some qualitative laboratory tests,such as those done in general urinalysis.Type III water can be used as a water source for preparation of type I or type II water and for washing and rinsing laboratory glassware.

Question 6

Distilled water is defined as water from which:&#10;A) iron, magnesium, calcium, and other minerals have been removed by heating and cooling the vapor.&#10;B) ions have been removed by charcoal filters.&#10;C) microbiological organisms have been removed.&#10;D) All of the above are correct.

Accepted Answer

Distilled water is defined as water from which iron,magnesium,calcium,and other minerals have been removed by heating and cooling the vapor (distillation).The process of distillation also removes microbiological organisms,but volatile impurities such as carbon dioxide,chlorine,and ammonia are not removed.Water that has been distilled meets the specifications for types II and III water.

Question 7

What is the standard unit of volume in the metric system?&#10;A) Meter&#10;B) Gram&#10;C) Liter&#10;D) Feet

Accepted Answer

In the clinical laboratory the standard unit of volume is the liter (L).It was not included in the list of base units of the SI system because the liter is a derived unit.The standard unit of volume in the SI system is the cubic meter (m³).In 1964 the Conférence Générale des Poids et Mésures (CGPM)accepted the litre (liter)as a special name for the cubic decimeter.One liter is slightly more than 1 quart (qt)in the English system (1 L = 1.06 qt).

Question 8

The ____ balance is the most commonly used balance in a clinical laboratory.&#10;A) mechanical analytical&#10;B) electronic analytical&#10;C) triple beam&#10;D) None of the above are correct.

Accepted Answer

The electronic analytical balance is easy to use and has replaced the traditional mechanically operated analytical balance in most clinical laboratories.

Question 9

In the process of deionization,water is:&#10;A) heated and cooled to liquefy the condensation.&#10;B) passed through a resin column containing positively (+) and negatively (-) charged particles.&#10;C) first heated and then passed through a resin column containing charged particles.&#10;D) both b and c.

Accepted Answer

In the process of deionization,water is passed through a resin column containing positively (+)and negatively (-)charged particles.These particles combine with ions present in the water to remove them; this water is known as deionized water.

Question 10

A reagent is defined as:&#10;A) any concentrated solution used for testing.&#10;B) any substance used to produce a chemical reaction.&#10;C) a solution contained in an instrument.&#10;D) a solution with a known concentration.

Accepted Answer

A reagent is defined as any substance used to produce a chemical reaction.

Question 11

What is the standard unit for the measurement of length in the metric system?&#10;A) Meter&#10;B) Gram&#10;C) Liter&#10;D) Feet

Accepted Answer

The answer of What is the standard unit for the...

Question 12

Type I reagent water must be used ____ after its production.&#10;A) immediately&#10;B) within 1 working day&#10;C) within 24 hours&#10;D) within a month

Accepted Answer

The answer of Type I reagent water must be used...

Question 13

Solutions prepared from the most highly purified types of chemicals available are ____ solutions.&#10;A) reagent&#10;B) standard&#10;C) molar&#10;D) acidic

Accepted Answer

The answer of Solutions prepared from the most highly purified...

Question 14

Convert 50&#176; F to &#176; C (Celsius).&#10;A) 5&#10;B) 10&#10;C) 20&#10;D) 40

Accepted Answer

The answer of Convert 50&#176; F to &#176; C (Celsius).&#10;A)...

Question 15

Convert 20&#176; C to &#176; F.&#10;A) 32&#10;B) 46&#10;C) 68&#10;D) 100

Accepted Answer

The answer of Convert 20&#176; C to &#176; F.&#10;A) 32&#10;B)...

Question 16

Each new lot or batch of reagent should be tested with ____ with the existing reagent.&#10;A) controls&#10;B) standards&#10;C) calibrators&#10;D) all of the above

Accepted Answer

The answer of Each new lot or batch of reagent...

Question 17

Flammable solvents should be stored in:&#10;A) a refrigerator.&#10;B) a freezer.&#10;C) special safety cans.&#10;D) a draft-free location.

Accepted Answer

The answer of Flammable solvents should be stored in:&#10;A) a...

Deck 6: Systems of Measurement, laboratory Equipment, and Reagents