Commercial-grade hydrogen peroxide is an effective disinfectant at room temperature after how many minutes?
a. 5 c. 30
b. 10 d. 60
Q. 2 Which of the following should routinely be used to ensure proper function and quality control of an autoclave?
1. Pressure-sensitive tape
2. Biologic indicators
3. Chemical indicators
4. Heat-sensitive tape
a. 2 c. 1, 2, and 3
b. 2 and 4 d. 1, 2, and 4
Q. 3 At high altitudes, sterilization by boiling must be prolonged primarily because of which of the following?
a. Increased oxygen content c. Increased normal boiling point
b. Reduced oxygen content d. Reduced normal boiling point
Q. 4 Dry-heat sterilization involves a 1-hour to 2-hour exposure at approximately:
a. 100 C. c. 170 C.
b. 132 C. d. 200 C.
Q. 5 Which of the following physical properties are required for an autoclave to sterilize biohazardous material?
1. Dry heat
2. A vacuum
3. 100 humidity
4. Increased air pressure
a. 2 and 3 c. 1, 2, and 4
b. 1 and 3 d. 2, 3, and 4
Q. 6 A 1.25 solution of acetic acid has been shown to be an effective bactericidal agent against:
a. Staphylococcus au-reus c. Micobacterium tu-berculosis
b. Pseudomonas aeru-ginosa d. Streptococcus pneumoniae
Q. 7 Carbolic acid is:
a. an acetic acid de-rivative. c. the basis for phenol derivatives.
b. a common disin-fectant. d. the only form of acid glutaralde-hyde.
Q. 8 An oxygen atom can be added to acetic acid to form an excellent disinfectant with sterilization capabilities. This disinfecting agent is:
a. peroxide. c. peracetic acid.
b. peroxidic acid. d. acetic peroxide.