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Comparisons

What a good question looks like

Compiled by the Sitonce editorial team from PTCB's own published outline, the federal regulations named below and US Bureau of Labor Statistics dataUpdated 3 min readFacts verified 5 September 2026
The short answer

A good question cites the regulation for federal answers, uses distractors built from real candidate errors, and on calculations includes the working in the explanation.

Four tests, and this exam allows a stricter standard than most because so much of it rests on public regulation.

Test one: does the federal explanation cite the source?

Fifteen of the 80 scored questions rest on 21 CFR and 40 CFR, which are public. An explanation that says "records must be kept two years" is asserting; one that says "21 CFR 1304.04" is citing. Filler teaches nothing.

The second lets you verify it in a minute and builds a habit of going to the source. The first asks you to trust a study guide.

On this exam that test is unusually available

Most licensing exams rest on copyrighted materials, so providers can only paraphrase and citation is impossible. Here the primary sources are US Government works. A provider that does not cite them has chosen not to, which tells you something.

Test two: are the wrong answers real mistakes?

On a calculation, the distractors should be the inverted conversion, the daily figure where a dose was asked, and the decimal place. On a controlled substance question, the rule from an adjacent schedule. Look it up yourself.

Options nobody would choose inflate your score and teach nothing.

Test three: does the calculation explanation show the working?

An answer of 6 mL is not an explanation. The steps - 44 pounds divided by 2.2 is 20 kg, times 15 mg is 300 mg, divided by 250 times 5 is 6 mL - are the explanation. One asserts. One cites.

Without them you cannot tell which step you got wrong, which is the only thing you needed to know.

Test four: is it weighted to the current outline?

A set with almost no federal questions is written to the pre-2026 paper, when the domain was 10 scored questions rather than 15.

A fifth test, for scenario questions

On Patient Safety, all four options should be plausible practice with one addressing the specific risk. If three are obviously wrong, the question is testing elimination rather than judgment.

Using a weak set

Look up the federal answers yourself in the regulation. You supply the missing citation and you learn where it lives, which is worth more than the explanation would have been.

Common questions

What makes a good PTCE practice question?

A cited source for federal answers, distractors built from real errors, shown working on calculations, and current weighting.

Why does citation matter here?

The primary sources are public US Government works, so citation is possible in a way it is not on most exams.

What is a good calculation explanation?

The steps, not the answer. Without them you cannot tell which step you got wrong.

What makes a good scenario distractor?

Plausible practice that addresses a different risk from the one in the stem.

How do I use a weak set?

Look the federal answers up in the regulation yourself.