PHYSICAL AND CHEMICAL AGENTS QUIZ

If a 1:600 dilution of a test compound kills a standard population of Staphylococcus aureus in 10 minutes but not 5 minutes while a 1:60 dilution of phenol kills the population in the same time, what is the phenol coefficient of the test compound?

1

50

10

5

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YOUR ANSWER : ?

Complete destruction of the microorganisms is commonly known as

antisepsis

sterilization

none of these

disinfection

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All of the following are sporicidal except

alcohol

glutaraldehyde

ethylene oxide

formaldehyde

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The time required to kill 90% of the microorganisms in a sample at a specific temperature is the

D value

decimal reduction time

F value

thermal death point

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Which of the following tests is designed to simulate the natural conditions under which the disinfectants are used in hospitals?

Minimum inhibitory concentration test

Capacity test

None of these

Phenol coefficient test

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Sweet and salty foods frequently don't require refrigeration to prevent spoilage because they have

low pH

toxic alkaline chemicals

insufficient nutrients

high concentration of solutes

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Which of the following is best to sterilize heat labile solutions?

Dry heat

Pasteurization

Autoclave

Membrane filtration

TRUE ANSWER : ?
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The time in minutes at a specific temperature needed to kill a population of cells is the

thermal death point

decimal reduction time

thermal death temperature

F value

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YOUR ANSWER : ?

Which is the most important surface active disinfectants?

Anionic compounds

Cationic compounds

Amphoteric compounds

Non-ionic compounds

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Which of the following process can be efficiently carried out by incineration?

Sterilization of scalpel blades and needles

Destruction of contaminated materials

Sterilization of points of forceps

Sterilization of all glass syringes

TRUE ANSWER : ?
YOUR ANSWER : ?

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