74D CBRN Specialist
Verified ASVAB line score requirement from the official Army specification. CBRN: Chemical, biological, radiological and nuclear defense.
ST ≥ 100
Chapter 10c initial entry qualification.
Verified
Source checked 2026-09-12
What this means
Official Army Chapter 10c PDF qualifying-score section verified; non-score requirements remain separate.
The score listed above is the minimum line score threshold from the official Army MOS specification. Meeting this threshold does not guarantee enlistment — additional requirements such as OPAT physical testing, security clearance, medical screening, and training availability are evaluated separately by your recruiter. To see how ST 100 compares with the rest of the Army, read what counts as a good ASVAB score.
Which ASVAB subtests count toward 74D
74D is judged on one line score. The subtests listed below are the Army's nominal definition of each aptitude area from DA PAM 611-21, Military Occupational Classification and Structure, Table 10-1 (ASVAB aptitude area composites). The score actually printed on your report is computed on the 1997 scale as a weighted sum of seven standard scores (DMDC 2004, Table 2.7) and may give weight to subtests outside the nominal list; GT is the exception and equals AR + VE exactly. Use the line score on your report, or compute it from your standard scores.
GS + VE (verbal: WK and PC) + MK + MC
GS (General Science), WK (Word Knowledge), PC (Paragraph Comprehension), MK (Mathematics Knowledge), MC (Mechanical Comprehension).
If your score is below ST ≥ 100
Your ASVAB report lists every line score, so start by finding ST and noting the exact gap. A small gap in one composite is usually closed by improving the subtests that feed it, and each subtest counts toward several line scores at once.
Practice on this site: GS (General Science), WK (Word Knowledge), PC (Paragraph Comprehension), MK (Mathematics Knowledge), MC (Mechanical Comprehension). Start a GS, WK, PC, MK, MC practice set for 74D →
A retest is subject to Army retest rules and timing; ask your recruiter before planning around one. Practice results here are raw scores and never convert into an official line score.
Other Army jobs judged on ST (Skilled Technical)
Because these MOS share the ST line score with 74D, the same subtests decide your standing for all of them. Jobs at or below 74D's threshold are fallback options; jobs above it are what a higher ST unlocks.
- 92L Petroleum Laboratory Specialist — ST ≥ 91
- 25B Information Technology Specialist — ST ≥ 95
- 68Q Pharmacy Specialist — ST ≥ 95
- 68R Veterinary Food Inspection Specialist — ST ≥ 95
- 68S Preventive Medicine Specialist — ST ≥ 98
- 12Y Geospatial Engineer — ST ≥ 100 and GT ≥ 100
- 12T Technical Engineer — ST ≥ 101
- 15Q Air Traffic Control Operator — ST ≥ 101
- 35F Intelligence Analyst — ST ≥ 101
- 35G Geospatial Intelligence Imagery Analyst — ST ≥ 101
- 35L Counterintelligence Agent — ST ≥ 101
- 35M Human Intelligence Collector — ST ≥ 101
Next steps
- Check your scores against this and other Army jobs
- Practice GS, WK, PC, MK, MC, the subtests that feed the ST score
- Browse all Army jobs by career field
- Confirm the current requirement with your recruiter before relying on this information
Frequently asked questions
What ASVAB score do I need for 74D CBRN Specialist?
The verified score threshold recorded for this MOS is ST ≥ 100. Other requirements such as OPAT, clearance, and training are separate.
Which ASVAB subtests count toward the ST score for 74D?
ST (Skilled Technical) is nominally GS + VE (verbal: WK and PC) + MK + MC. The reported score is a weighted sum of seven standard scores on the 1997 scale, so subtests outside that list can also count. Compare the line score printed on your ASVAB report against ST ≥ 100, or compute it from your standard scores with the calculator.
Is AFQT enough to qualify for 74D?
No. AFQT is used for general enlistment qualification. 74D uses specific Army line scores (ST ≥ 100), and the line-score rule shown here is the verified threshold. These are composite scores calculated from ASVAB subtests and are different from your AFQT percentile.
Where does this 74D score requirement come from?
The verified threshold is recorded from the official Army MOS specification document. Chapter 10c initial entry qualification. Source checked on 2026-09-12.