Free CEICT Practice Questions

Question 1

Ceiling demolition releases dust into a unit caring for allogeneic stem-cell transplant recipients with prolonged neutropenia. When infection prevention assesses the exposure, which organism-reservoir pairing deserves particular attention?

Accepted Answer

Aspergillus species in dust disturbed above the suspended ceiling

Answer

Legionella species in warm water circulating through the building's plumbing

Answer

Pseudomonas aeruginosa in patient-room sink-drain biofilm

Answer

Mycobacterium tuberculosis in respiratory secretions from an infectious person

Question 2

A renovated airborne infection isolation room measures 20 × 15 × 10 ft. Measured supply is 600 cfm, and exhaust to outdoors is 700 cfm; there is no other mechanical air-removal system. Room pressure minus corridor pressure is −0.8 Pa with the door closed. The approved commissioning criteria require at least 12 exhaust air changes per hour (ACH) and a pressure difference of −2.5 Pa or more negative. Which assessment correctly combines the ventilation calculation with the pressure finding?

Accepted Answer

14 ACH; the air-change criterion passes, but the pressure criterion fails.

Answer

14 ACH; both criteria pass because the room pressure is negative.

Answer

26 ACH; both criteria pass because supply and exhaust flows are added.

Answer

12 ACH; the required air-change rate is met, but the pressure difference is inadequate.

Question 3

During powered demolition beside an occupied oncology corridor, the containment exhaust fan loses power and dust appears at a barrier seam. The supervisor proposes collecting an air sample before interrupting the crew. What takes priority?

Accepted Answer

Stop dust-generating work and secure the opening while exhaust is restored.

Answer

Collect an air sample before disturbing the conditions at the leak.

Answer

Arrange transfer of the nearby patients before interrupting the demolition crew's work.

Answer

Shut down the corridor air handler before addressing the work-zone opening.

Question 4

A Protective Environment room houses a stem-cell transplant recipient who has no airborne infectious disease. Its HEPA-filtered supply provides 15 ACH, and room pressure is 4 Pa above the corridor. Air moves outward through the closed-door gap. Nearby construction remains within verified containment. How should the technician interpret the outward airflow?

Accepted Answer

It is the intended protective direction; retain the settings and continue monitoring.

Answer

It calls for balancing the room to neutral pressure before construction continues.

Answer

It requires reversing the room pressure to prevent contamination of the corridor.

Answer

It warrants moving the patient to airborne isolation until the outward flow stops.

Question 5

After replacing a HEPA filter, a contractor presents its factory certificate showing 99.97% capture at 0.3 micrometers as proof that the completed installation has no bypass leakage. What additional evidence directly addresses that claim?

Accepted Answer

A field leakage test of the installed filter media and perimeter seals

Answer

A calibration record for the unit's separate room-pressure monitoring instrument

Answer

The manufacturer's efficiency curve for the replacement filter model

Answer

A record of measured airflow at each outlet served by the filter

Question 6

Several older residents with swallowing difficulties develop Legionnaires' disease. None used a shower or whirlpool during the suspected exposure period. Which exposure history would still support investigating the facility's potable-water system?

Accepted Answer

Aspirating tap water served from the facility's plumbing system

Answer

Breathing dust released during ceiling-tile replacement outside their rooms

Answer

Handling shared bed rails touched by a resident with diagnosed pneumonia

Answer

Breathing cough aerosols from a roommate who had Legionnaires' disease

Question 7

A construction enclosure meets its negative-pressure target, but an active return grille still connects it to the air handler serving occupied rooms. Which design change addresses the contamination route that the pressure reading does not exclude?

Accepted Answer

Isolate the work-zone return and verify the revised air balance.

Answer

Increase local exhaust while leaving the shared return connection in service.

Answer

Add a portable recirculating HEPA cleaner to the adjacent occupied corridor.

Answer

Install finer prefilters on the construction exhaust unit to improve dust capture.

Question 8

A volumetric air-sampling comparison yields these results:
Before construction: 4 colonies from 200 L of air.
During construction: 10 colonies from 500 L of air.
Collection and laboratory methods are identical, and no colony-count correction is required. What do the results demonstrate?

Accepted Answer

Both concentrations are 20 CFU/m³; these samples show no measured concentration increase.

Answer

Concentrations are 4 and 10 CFU/m³; the airborne concentration increased 2.5-fold.

Answer

Concentrations are 20 and 50 CFU/m³; the airborne concentration increased 2.5-fold.

Answer

Both concentrations are 20 CFU/m³; the work area therefore meets microbiological clearance requirements.

Question 9

Visible soil has been removed from the hard, nonporous surfaces in a room vacated by a patient with Clostridioides difficile infection. Which product-and-use combination targets the organism's persistent environmental form?

Accepted Answer

An EPA List K sporicide, keeping surfaces wet for its labeled contact time

Answer

A nonsporicidal tuberculocidal disinfectant, applied at its labeled concentration and contact time

Answer

A nonsporicidal fungicidal disinfectant, applied twice at its labeled concentration and contact time

Answer

A 70% alcohol product, reapplied to the surface during the full labeled contact time

Question 10

A team cites the CDC estimate of 35 minutes for 99.9% airborne-contaminant removal at 12 ACH. They start a timer after sputum induction ends, although the patient with infectious pulmonary tuberculosis remains in the room coughing. Why can the elapsed time not establish the claimed clearance?

Accepted Answer

The estimate assumes no continuing source of airborne contamination in the room.

Answer

The table requires every air change to come directly from outdoors.

Answer

The timer must start after terminal surface cleaning, regardless of patient occupancy.

Answer

The table applies only to rooms that maintain positive pressure to the corridor.

Free CEICT Practice Questions

Domain 1: Infectious Diseases and Their Modes of Transmission in the Healthcare Setting

Question 1

Question 2

Domain 2: Principles of Infection Control During Construction, Demolition and Renovation

Question 3

Question 4

Question 5

Question 6

Domain 3: Effective Infection Control Practices

Question 7

Question 8

Question 9

Question 10

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