Free CBET Test Question and Answers

Question 1

Which of the following conventional ECG leads allows you to see the heart's inferior wall?

Accepted Answer

aVF

Answer

The inferior wall of the heart is best viewed by the ECG leads II, III, and aVF. These leads are positioned to detect electrical activity from the inferior aspect of the heart. Lead aVF specifically stands for 'augmented vector foot' and provides a clear electrical perspective looking up from the foot towards the heart's inferior surface.

Question 2

Which of the following current leakage tests does NOT meet IEC or NFPA 99 standards?

Accepted Answer

Machine leakage current

Answer

IEC 60601-1 and NFPA 99 standards specify several types of leakage current tests for medical electrical equipment, including Earth leakage current, Patient leakage current, and Chassis (or enclosure) leakage current. 'Machine leakage current' is not a recognized or standard term for leakage current testing within these international and national safety regulations.

Question 3

Which of the following MOST accurately describes the hematocrit centrifuge's relative centrifugal force (RFC)?

Accepted Answer

10,000 RCF

Answer

Hematocrit centrifuges are designed to rapidly separate blood components, requiring a high relative centrifugal force (RCF) to efficiently pack red blood cells. An RCF of approximately 10,000-12,000 G (or RCF) is typically used for accurate hematocrit determination, making 10,000 RCF the most appropriate and common value among the choices for this application.

Question 4

What forces drive the kidneys' filtration?

Accepted Answer

Blood pressure

Answer

The primary force driving glomerular filtration in the kidneys is hydrostatic pressure, which is essentially the blood pressure within the glomerular capillaries. This pressure forces water and small solutes from the blood into Bowman's capsule, initiating the process of urine formation. Other forces like osmosis or muscle contraction play roles elsewhere in the urinary system but not in the initial filtration.

Question 5

What may be measured with a digital multimeter's (DMM) continuity mode?

Accepted Answer

Total resistance between two points

Answer

A digital multimeter (DMM) in continuity mode is designed to detect if there is a complete electrical path between two points. It typically emits an audible tone if the resistance between the points is very low (indicating continuity) and often displays the resistance value. Therefore, it measures the total resistance, specifically looking for very low resistance to confirm a continuous path.

CBET - Certified Biomedical Equipment Technician Practice Test

CBET - Certified Biomedical Equipment Technician Practice Test

Free CBET Test Question and Answers