Question 1
The conductivity monitor on a hemodialysis machine primarily protects the patient by:
Show answer & explanation
Correct answer: C - Confirming the dialysate concentration is correct
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The CHBT exam has 150 questions and runs 3 hours.
These 10 free CHBT questions are organized by exam domain, so you can see how each part of the Certified Hemodialysis Bio-Medical Technician (CHBT) blueprint is tested. Reveal the answer and explanation under each question.
The conductivity monitor on a hemodialysis machine primarily protects the patient by:
Correct answer: C - Confirming the dialysate concentration is correct
When the air/foam detector on the venous line senses air, the machine's protective response is to:
Correct answer: D - Stop the blood pump and clamp the venous line
Several hemodialysis patients develop hemolysis during treatment, and the investigation points to exhausted carbon adsorption tanks. Which contaminant reaching the patients is the MOST likely cause of the hemolysis?
Correct answer: B - Chloramine
A reverse osmosis unit shows a feed-water conductivity of 500 µS/cm and a product-water conductivity of 25 µS/cm. What is the percent rejection?
Correct answer: C - 95%
In a water system with two carbon tanks in series, where is total chlorine (chloramine) MOST appropriately sampled to give an early warning of carbon exhaustion while still retaining a margin of safety?
Correct answer: B - Between the worker and polisher tanks
Under AAMI standards adopted by CMS, total chlorine in water used to prepare dialysate must not exceed which level, verified before the treatment day begins?
Correct answer: A - 0.1 mg/L
Bicarbonate dialysate is supplied as two separate concentrates (acid and bicarbonate) that combine only at final dilution. The MAIN reason for keeping them separate is to prevent:
Correct answer: D - Precipitation of calcium and magnesium carbonate
During dialyzer reprocessing, a dialyzer's total cell volume (TCV) measures 79% of its original value. According to standard reprocessing criteria, the dialyzer should be:
Correct answer: C - Discarded
Emergency eyewash stations in areas where staff handle acid concentrate and germicides should be activated and flushed at what MINIMUM frequency, per ANSI standards?
Correct answer: A - Weekly
Which organization develops the technical standards for water and dialysate quality that CMS incorporates into the ESRD Conditions for Coverage?
Correct answer: A - AAMI
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