NCED Cheat Sheet 2026

The 30 highest-yield NCED facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the primary function of an OBD-II port on a modern vehicle? → To allow diagnostic tools to communicate with the vehicle's ECU and read fault codes
2. Which ethical principle requires an educational diagnostician to disclose potential conflicts of interest before conducting an evaluation? → Fidelity and responsibility
3. The concept of 'least restrictive environment' (LRE) under IDEA is primarily a safety and rights standard intended to ensure that students with disabilities: → Are educated alongside non-disabled peers to the maximum extent appropriate
4. Which gear in a final drive assembly is responsible for transmitting torque at 90 degrees from the driveshaft to the axle shafts? → Hypoid ring and pinion gear set
5. A test's standard error of measurement (SEM) is used to: → Construct a confidence interval around an obtained score
6. Which type of hydraulic pump is most commonly used in high-pressure industrial systems due to its efficiency? → Piston pump
7. What is peer review in NCED Engine Performance & Tuning? → Quality evaluation by qualified colleagues for improvement
8. What is the typical operating pressure range for most industrial pneumatic systems? → 80–120 psi
9. Which component prevents a vehicle from being started in any gear except Park or Neutral in an automatic transmission-equipped vehicle? → Neutral safety switch (transmission range sensor)
10. A wastegate on a turbocharged engine serves to: → Bypass exhaust gases around the turbine wheel to regulate and limit boost pressure
11. A wideband oxygen sensor differs from a narrowband sensor because it: → Measures AFR accurately across a wide range, not just near stoichiometry
12. Under EPA's New Source Performance Standards (NSPS), which scenario triggers applicability for a new emission unit at an existing facility? → Construction or modification that increases emission rates above threshold levels
13. Which of the following best describes the purpose of a Base Rate analysis when interpreting WISC-V index scores? → To identify how commonly a given score pattern occurs in the normative sample
14. What is the first step in conducting an educational evaluation? → Gather background information from teachers, parents, and students.
15. What is a needs assessment in NCED Engine Performance & Tuning practice? → Identifying gaps between current conditions and desired outcomes
16. The 'creep' behavior of a vehicle with an automatic transmission at idle in Drive is caused by: → Fluid coupling torque multiplication in the torque converter at low speeds
17. What is backup and disaster recovery for in NCED technology? → Ensuring data restoration and operations resumption after failures
18. Excessive exhaust backpressure in a performance engine will typically: → Reduce power by inhibiting efficient expulsion of burned gases from cylinders
19. Section 504 of the Rehabilitation Act differs from IDEA primarily in that Section 504: → Provides accommodations without requiring a specialized curriculum
20. Under EPA's Greenhouse Gas Reporting Program, which sector is the single largest contributor to U.S. greenhouse gas emissions? → Transportation
21. What does the color green or bare copper indicate for a conductor in US wiring? → Equipment grounding conductor
22. Observations conducted across multiple settings (classroom, hallway, cafeteria) during a special education evaluation serve to: → Assess the generalizability and pervasiveness of identified concerns
23. What is the principle of least privilege in NCED technology? → Users get only the minimum access needed for their role
24. Under EPA's Prevention of Significant Deterioration (PSD) program, a major new source in an attainment area must install which type of emission control? → Best Available Control Technology (BACT)
25. An educational diagnostician who bills Medicaid for services never rendered has committed: → Healthcare fraud, which is a federal crime
26. What is the principle of least privilege in NCED technology? → Users get only the minimum access needed for their role
27. Which action during test scoring review best prevents errors that could alter eligibility decisions? → Independently re-entering raw scores and recalculating standard scores to verify accuracy
28. What does the educational diagnostician analyze when reviewing a student's academic records? → Grades, attendance, and previous assessments.
29. A diagnostician is about to administer a visual-motor integration test and notices the student's glasses are missing. The best preventive action is to: → Postpone the visual-motor subtest until the student has appropriate corrective lenses
30. What is an SLA in NCED technology? → A formal agreement defining expected service performance standards