Physical and Chemical Agents Which of the following is a limitation of the autoclave? It takes too long to sterilize It lacks the ability to kill endospores It lacks the ability to inactivate viruses It will destroy heat labile materials It takes too long to sterilize It lacks the ability to kill endospores It lacks the ability to inactivate viruses It will destroy heat labile materials ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following material is sterilized by heating at 160°C in a hot air oven for one hour? Swab sticks All-glass syringes All of these Oils and jellies Swab sticks All-glass syringes All of these Oils and jellies ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which is the most important surface active disinfectants? Amphoteric compounds Cationic compounds Anionic compounds Non-ionic compounds Amphoteric compounds Cationic compounds Anionic compounds Non-ionic compounds ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents 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? 5 10 1 50 5 10 1 50 ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Which of the following is best used for long term storage of microbial samples when carried out properly? Storage in a freezer at -10°C Storage in a freezer at ultra low temperatures (-70°C) Storage in a refrigerator on an agar slant Storage on a petri plate at room temperature Storage in a freezer at -10°C Storage in a freezer at ultra low temperatures (-70°C) Storage in a refrigerator on an agar slant Storage on a petri plate at room temperature ANSWER DOWNLOAD EXAMIANS APP
Physical and Chemical Agents Sweet and salty foods frequently don't require refrigeration to prevent spoilage because they have toxic alkaline chemicals high concentration of solutes low pH insufficient nutrients toxic alkaline chemicals high concentration of solutes low pH insufficient nutrients ANSWER DOWNLOAD EXAMIANS APP
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