CET CET Equipment Operation and Maintenance

Question 1

What does the standard paper speed setting of 25 mm/sec mean on an EKG tracing?

Accepted Answer

Each small box represents 0.04 seconds horizontally

Answer

Each large box represents 0.04 seconds

Answer

Each large box represents 0.5 mV

Answer

Each small box represents 0.5 mV

Question 2

What is the standard voltage calibration for a clinical EKG machine?

Accepted Answer

10 mm/mV

Answer

5 mm/mV

Answer

25 mm/mV

Answer

1 mm/mV

Question 3

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:

Accepted Answer

Half standard (5 mm/mV)

Answer

Full standard (10 mm/mV)

Answer

Double standard (20 mm/mV)

Answer

25 mm/sec paper speed

Question 4

What is the primary purpose of the filter settings (e.g., 40 Hz, 150 Hz) on a modern EKG machine?

Accepted Answer

To reduce electrical artifact and noise without distorting cardiac waveforms

Answer

To increase paper speed

Answer

To calibrate electrode impedance

Answer

To select the number of leads to record

Question 5

Which lead wire color corresponds to the right arm (RA) electrode in the American (AHA) color-coding system?

Accepted Answer

White

Answer

Black

Answer

Green

Answer

Red

Question 6

How often should reusable EKG lead wires and clips be cleaned according to standard infection control practices?

Accepted Answer

After each patient use

Answer

Once per week during scheduled maintenance

Answer

Only when visibly soiled

Answer

Once per month