CBET General Practice 4

Question 1

A hospital's isolated power system (IPS) is designed primarily to protect against:

Accepted Answer

Macroshock from single-fault ground currents in wet locations

Answer

Power surges from the utility grid

Answer

Electromagnetic interference from adjacent equipment

Answer

Overloading of the facility's main circuit breakers

Question 2

When testing a line isolation monitor (LIM), the alarm should activate when the hazard current exceeds:

Accepted Answer

5 mA

Answer

1 mA

Answer

2 mA

Answer

10 mA

Question 3

A technician notices the hospital's oxygen wall outlet delivers flow but at a lower pressure than specification. The MOST likely cause is:

Accepted Answer

Excessive demand from too many simultaneous users on that zone

Answer

Contamination of the oxygen supply with nitrogen

Answer

A partially closed or faulty zone valve upstream

Answer

A calibration error in the flowmeter

Question 4

In a digital-to-analog converter (DAC) used in medical equipment, increasing the bit resolution from 8-bit to 12-bit:

Accepted Answer

Increases the number of discrete output levels from 256 to 4,096

Answer

Doubles the output voltage range

Answer

Reduces conversion speed by a factor of 4

Answer

Decreases the signal-to-noise ratio

Question 5

A technician is performing annual PM on a hospital bed. Which safety check is MOST critical for patient fall prevention?

Accepted Answer

Testing siderail locking mechanisms for secure engagement

Answer

Verifying the bed's Trendelenburg angle accuracy

Answer

Calibrating the bed's weight scale

Answer

Inspecting the mattress cover for tears

Question 6

The International System of Units (SI) base unit for electric current is the:

Accepted Answer

Ampere

Answer

Volt

Answer

Watt

Answer

Coulomb

Question 7

A biomedical technician must ensure an ECG machine's patient lead leakage current does not exceed which limit for a CF-type device per IEC 60601-1?

Accepted Answer

10 µA under normal conditions

Answer

100 µA under normal conditions

Answer

50 µA under normal conditions

Answer

500 µA under normal conditions