Controlling Microbes Test

Physical removal of microbes without killing them is

• germicidal

• antisepsis

• degerming

• sanitization

• germistatic

Which of the following statements is TRUE of disinfectants?

• They are used on living tissue

• They are only effective for short periods of time (seconds to minutes)

• They are effective in destroying endospores

• They are used on inanimate surfaces

• They are used for sterilization

Which of the following is an example of sanitization?

• A nurse prepares an injection site with an alcohol swab

• Heat is used to kill potential pathogens in apple juice

• An autoclave is used to prepare nutrient agar

• A public toilet is treated with disinfectants

• A surgeon washes her hands before surgery

Which of the following is bacteriostatic?

• heating in an oven at 171°C for an hour

• autoclaving

• freezing below 0°C

• flash pasteurization

• filtration

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

• autoclave

• freezing

• pasteurization

• dry heat

• membrane filtration

Which chemical disinfectant can be considered a sterilizing liquid agent when appropriately applied?

• quaternary ammonium compounds

• ethylene oxide

• 70% ethanol

• gluteraldehyde

• sodium benzoate

A kitchen countertop has a spill of vegetable oil that was wiped up but a film remains. What should be the next step in disinfecting this surface?

• isopropanol

• chlorhexidine containing solution

• 10% bleach

• warm soapy scrub

• spray a disinfectant that contains a heavy metal

The most resistant of the bacterial endospores can withstand boiling for up to

• 5 hours

• 20 hours

• 10 min.

• 30 min.

• 1 hour.

Which one of the following is known to be most resistant to quaternary ammonium compounds?

• gram positive bacteria

• fungi

• enveloped viruses

• members of the genus Staphylococcus

• members of the genus Pseudomonas

Bone and tendons for transplant are decontaminated by

• glutaraldehyde.

• ethylene oxide.

• plasma sterilization.

• supercritical fluids.

• peroxigens.

Tags

NGSS.HS-PS1-5