MOH Infection Control & Hospital Epidemiology 2

Question 1

Which sterilization method is most appropriate for heat-sensitive medical devices such as flexible endoscopes?

Accepted Answer

Ethylene oxide (ETO) gas sterilization

Answer

Steam autoclaving at 134°C

Answer

Dry heat sterilization at 170°C

Answer

Boiling at 100°C for 30 minutes

Question 2

According to the Spaulding classification, a device that contacts intact mucous membranes but does not penetrate sterile tissue is classified as:

Accepted Answer

Semi-critical

Answer

Critical

Answer

Non-critical

Answer

Sterile

Question 3

A patient colonized with MRSA (Methicillin-resistant Staphylococcus aureus) should be placed under which precautions?

Accepted Answer

Contact precautions with gloves and gown

Answer

Airborne precautions in a negative-pressure room

Answer

Droplet precautions with a surgical mask

Answer

Standard precautions only

Question 4

The most important modifiable risk factor for catheter-associated urinary tract infections (CAUTI) is:

Accepted Answer

Prolonged duration of urinary catheter use

Answer

Poor sterile technique during catheter insertion

Answer

Use of an incorrect catheter size

Answer

Irrigating the catheter with tap water

Question 5

Which intervention is most effective in preventing ventilator-associated pneumonia (VAP)?

Accepted Answer

Elevating the head of bed to 30–45 degrees

Answer

Placing the patient in a flat supine position

Answer

Changing ventilator circuits every 24 hours

Answer

Administering prophylactic systemic antibiotics routinely

Question 6

An N95 respirator (rather than a standard surgical mask) is required when caring for a patient with:

Accepted Answer

Active pulmonary tuberculosis

Answer

Hepatitis B

Answer

Influenza

Answer

Clostridium difficile infection

Question 7

The correct sequence for doffing (removing) PPE to minimize self-contamination is:

Accepted Answer

Gloves → Gown → Eye protection → Mask/respirator

Answer

Mask → Gloves → Gown → Eye protection

Answer

Gown → Gloves → Eye protection → Mask

Answer

Eye protection → Mask → Gown → Gloves