CET Equipment Operation and Maintenance Flashcards
6 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CET Equipment Operation and Maintenance flashcards as text
What does the standard paper speed setting of 25 mm/sec mean on an EKG tracing?
Answer: Each small box represents 0.04 seconds horizontally
At 25 mm/sec, each 1 mm small box on the horizontal axis equals 0.04 seconds of time.
What is the standard voltage calibration for a clinical EKG machine?
Answer: 10 mm/mV
Standard EKG calibration is 10 mm/mV, meaning a 1 mV signal produces a 10 mm deflection on the paper.
A calibration pulse at the start of an EKG tracing appears shorter than expected (5 mm instead of 10 mm). This indicates the machine is set to:
Answer: Half standard (5 mm/mV)
A 5 mm calibration pulse indicates the machine is set to half standard, which is used when large-amplitude waveforms extend off the paper.
What is the primary purpose of the filter settings (e.g., 40 Hz, 150 Hz) on a modern EKG machine?
Answer: To reduce electrical artifact and noise without distorting cardiac waveforms
Filters attenuate high-frequency or low-frequency noise (such as muscle artifact or AC interference) while preserving the diagnostic waveform shape.
Which lead wire color corresponds to the right arm (RA) electrode in the American (AHA) color-coding system?
Answer: White
In the AHA system used in the US, white identifies the right arm lead wire.
How often should reusable EKG lead wires and clips be cleaned according to standard infection control practices?
Answer: After each patient use
Reusable lead wires must be disinfected after each patient to prevent cross-contamination between patients.