Physical and Chemical Agents problems
- 1. Media containing spores and thermolabile constituents are sterilized by
Options- A. pasteurization
- B. UV radiation
- C. dry heat
- D. tyndalization Discuss
Correct Answer: UV radiation
- 2. Which of the following material is sterilized by use of red heat?
Options- A. Soiled dressings
- B. Inoculating wires and loops
- C. Glass slides
- D. All-glass syringes Discuss
Correct Answer: Inoculating wires and loops
- 3. Which disinfectant would be most effective against Staphylococcus found in a blood spill?
Options- A. Phenol
- B. Cetylpyridinium chloride
- C. Hexachlorophene
- D. None of these Discuss
Correct Answer: None of these
- 4. Which of the following was the first widely used antiseptic and disinfectant?
Options- A. Chlorine
- B. Phenol
- C. Iodine
- D. Alcohol Discuss
Correct Answer: Phenol
- 5. 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?
Options- A. 1
- B. 5
- C. 10
- D. 50 Discuss
Correct Answer: 10
- 6. A(n)____is used to prevent infection by killing or inhibiting pathogen growth on animal tissues.
Options- A. bacteriostatic agent
- B. sanitizer
- C. disinfectant
- D. antiseptic Discuss
Correct Answer: antiseptic
- 7. Which of the following describes the effect of ionizing radiation on microbes?
Options- A. Changes the 3-dimensional structure of proteins to a 2-dimen-sional form
- B. Substantially decreases enzymatic activity, slowing microbial reproduction
- C. Induces electrons and protons to jump out of the molecules of the microbe
- D. None of the above Discuss
Correct Answer: Induces electrons and protons to jump out of the molecules of the microbe
- 8. The lowest temperature that kills all microorganisms in a liquid suspension in 10 minutes is known as the
Options- A. decimal reduction time
- B. thermal death point
- C. thermal death temperature
- D. thermal death time Discuss
Correct Answer: thermal death point
- 9. Which of the following is not a disinfectant containing a heavy metal?
Options- A. Silver nitrate
- B. Mercurochrome
- C. Copper sulfate
- D. Chlorine Discuss
Correct Answer: Chlorine
- 10. Which of the following tests is designed to simulate the natural conditions under which the disinfectants are used in hospitals?
Options- A. Phenol coefficient test
- B. Minimum inhibitory concentration test
- C. Capacity test
- D. None of these Discuss
Correct Answer: Capacity test
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