MCQs Test on Disinfectants.
Multiple Choice Questions on Microbiology: Disinfectants.
MCQs: Antiseptics and Disinfectants.
Quiz
Atttempt as many times u like within 45 minutes.
- Which of the following is considered as a most effective disinfectant in the “surfactant” category.
- Cationic surfactants.
- Anionic surfactants
- Amphoteric surfactants.
- All of the above.
- Which of the following is used as a disinfectant in vapor phase.
- Formaldehyde
- Iodine
- Bromine
- Isopropyl Alcohol.
- The "Rideal Walker" coefficient is used to identify the strength of a,
- Antiseptic
- Antibiotic
- Antiviral
- All of the above
- In determination of the Rideal Walker coefficient (UK) the bacterial strain used is,
- Eshericia coli.
- Staphylococcus aureus
- Salmonella typhi
- Pseudomonas aeruginosa
- Phenol coefficient is used to determine the ----- of a disinfectant.
- Quantity.
- Purity
- Efficiency
- Mechanism of action
- Most disinfectants kill which form of the pathogenic microorganisms.
- Spores
- Vegetative cells
- Both Spores and vegetative cells.
- All of the above
- Higher alcohols like Isopropyl alcohol are more germicidal than Ethyl alcohol.
- True
- False
- Ethyl alcohol is used as skin disinfectant in what concentration?
- 50-60% v/v.
- 60-70% v/v.
- 70-80% v/v.
- None of the above.
- Isopropyl alcohol is used as skin disinfectant in what concentration?
- 50-60% v/v.
- 60-70% v/v.
- 70-80% v/v.
- None of the above.
- Iodine is combined with surfactants to produce compounds called,
- Iodophors
- Iodochromes
- Iodogenines
- Iodosurfones
- The disinfectant which was used by Lister in the first antiseptic surgery is?
- Phenol
- Carbolic acid.
- Cresol
- Chloroxylenol
- Disinfectants are usually,
- Sporicidal
- Bactericidal
- Bacteriostatic
- All of the above
- Halogens are known irritants, the only halogen used for “Disinfection” is----.
- Iodine
- Chlorine
- Bromine
- Fluorine
- Silver nitrate a known disinfectant acts by,
- Coagulation of cytoplasmic proteins.
- Oxidation of cytoplasmic proteins.
- Inhibition of cell wall synthesis.
- Inhibition of protein synthesis.
- Cresol with soap (Lysol) is more germicidal than phenol itself.
- True.
- False.
- In case of Quaternary ammonium compound which are most effective as disinfectants,
- Cationic.
- Anionic.
- Amphoteric.
- All of the above.
- Which of the following is an example of “Aniline Dye”.
- Malachite Green.
- Proflavine.
- Aminacrine.
- Enflavine.
- Which of the following is an example of “Acridine Dye”.
- Malachite Green.
- Proflavine.
- Crystal Violet.
- Brilliant Green.
- Which of the following factors affect the action of a disinfection.
- Concentration of a disinfectant.
- Temperature.
- Time of contact.
- All of the above.
- Disadvantage of phenol coefficient test is / are,
- Only one organism is used.
- No information about tissue toxicity.
- Presence of organic matter is not considered.
- All of the above.
- In Kelsey-Sykes Test sampling is done at an interval…..
- 8-18-28 mins.
- 5-10-15 mins.
- 6-12-18 mins.
- 10-15-20 mins.
- For purification of swimming pools and water supplies which chemical is preferred?
- Chlorine.
- Bromine.
- Iodine.
- Alcohol.
- Before injections skin is sterilized with,
- Heavy metals.
- Ethyl Alcohol.
- Iodine.
- Phenol.
- Alcohol a known disinfectant acts by,
- Coagulation of cytoplasmic proteins.
- Inhibition of cell wall synthesis.
- Inhibition of protein synthesis.
- Oxidation of cytoplasmic proteins.
- Chick-Martin Test is used to determine----- of a disinfectant,
- Quantity.
- Purity.
- Efficiency.
- Mechanism of action.
Labels: Microbiology, Pharmaceutics
posted by Dr. Shirish Nagansurkar @ October 18, 2020
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