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NPS National Performance Specialists VIP Certification Exam
NPS — The National Performance Specialists (NPS) certification is an industry credential issued through the automotive aftermarket performance sector, assessing competency in engine performance, forced induction, fuel systems, engine management calibration, drivetrain, and chassis dynamics; no single universal governing body administers a standardized NPS exam, so this is an original comprehensive practice set modeled on the knowledge domains tested across ASE Performance (L1/A8), SEMA-adjacent specialist credentials, and professional-level dyno/calibration certification programs.
28
Questions
90m
Time Limit
75.00%
To Pass
Question 1 of 28👑 VIP
A turbocharged 2.0L four-cylinder engine is producing inconsistent boost pressure on a dyno pull. The wastegate actuator rod is properly adjusted, the boost controller is commanding 18 psi, but peak boost reads 14 psi and then fluctuates ±3 psi. A boost leak test at 20 psi holds steady. Intercooler inlet and outlet temperatures are normal. Which diagnosis is MOST likely?
Questions 2–28 and full explanations are VIP-exclusive.