CBET General Practice 5

Question 1

When using a multimeter to measure AC voltage on a 120V circuit, the technician should set the range to:

Accepted Answer

A range equal to or above 120V to prevent meter damage

Answer

The lowest range below 120V for best accuracy

Answer

DC voltage at 200V

Answer

Resistance mode to check the circuit first

Question 2

A hospital laboratory centrifuge vibrates excessively during operation. The MOST likely cause is:

Accepted Answer

An unbalanced load due to improperly paired or misplaced samples

Answer

Motor bearing wear causing rotor imbalance

Answer

Excessive ambient temperature in the lab

Answer

A failed tachometer sensor

Question 3

Which type of radiation is MOST effectively stopped by a thin sheet of aluminum foil?

Accepted Answer

Beta particles

Answer

Gamma rays

Answer

X-rays

Answer

Alpha particles

Question 4

A technician completing a work order should document which of the following to satisfy Joint Commission traceability requirements?

Accepted Answer

Device identification, service performed, test results, technician ID, and date

Answer

Only the parts replaced and their cost

Answer

The patient census count at time of service

Answer

Only failures found, not routine PM results

Question 5

The output impedance of a device should ideally be low because:

Accepted Answer

It minimizes signal voltage drop when driving a load

Answer

It increases the device's power consumption

Answer

It prevents electromagnetic interference

Answer

It increases current draw from the power supply

Question 6

Which sterilization method is MOST appropriate for heat-sensitive flexible endoscopes?

Accepted Answer

Ethylene oxide (EtO) gas sterilization

Answer

Steam autoclave at 134°C

Answer

Dry heat oven at 160°C

Answer

UV light irradiation

Question 7

In an op-amp configured as an inverting amplifier with Rf = 100 kΩ and Rin = 10 kΩ, the voltage gain is:

Accepted Answer

-10

Answer

+10

Answer

+0.1

Answer

-0.1