CABT Equipment Maintenance and Troubleshooting 3

Question 1

During a scheduled PM on an infusion pump, you discover the flow-rate accuracy is ±8% at 5 mL/hr. Most manufacturers specify accuracy within:

Accepted Answer

±5%

Answer

Most infusion pump manufacturers and standards specify flow-rate accuracy within ±5% of the set rate across normal operating ranges.

Question 2

A surgical electrosurgical unit (ESU) causes interference on the patient monitor in the same OR. The first corrective step is to:

Accepted Answer

Inspect and improve the ESU's return electrode contact

Answer

Poor return-electrode contact forces stray ESU current through alternative paths, increasing electromagnetic interference; improving the pad contact is the first step.

Question 3

Which lubricant is generally recommended for O-rings in medical gas equipment?

Accepted Answer

Silicone-based lubricant

Answer

Silicone-based lubricants are oxygen-compatible and are recommended for O-rings in medical gas systems; petroleum-based products are fire hazards with oxygen.

Question 4

A hospital bed's nurse-call function is inoperative after repairs. What document should the technician consult to verify wiring?

Accepted Answer

The manufacturer's service/wiring diagram

Answer

The manufacturer's service manual and wiring diagram provides authoritative information on correct wiring, connectors, and signal paths for the nurse-call circuit.

Question 5

When inspecting a suction regulator, you note the vacuum gauge reads 0 mmHg even though the wall outlet is functional. The most likely fault is:

Accepted Answer

Ruptured regulator diaphragm

Answer

A ruptured diaphragm inside the regulator prevents the creation of negative pressure, causing the gauge to remain at zero despite a working vacuum source.

(CABT) Certified Associate in Biomedical Technology Practice Test

(CABT) Certified Associate in Biomedical Technology Practice Test

CABT Equipment Maintenance and Troubleshooting 3