EMISSIONS STUDY GUIDE EXAM AND ACTUAL ANSWERS 2025.

EMISSIONS STUDY GUIDE EXAM AND
ACTUAL ANSWERS 2025.
WHAT IS THE MAIN FUNCTION OF THE EGR VALVE? - Answer TO LOWER THE PRODUCTION OF
NOX GAS IN THE COMBUSTION CHAMBER



WHAT SHOULD AN EMISSION INSPECTOR USE TO DETERMINE THE GVWR OF A VEHICLE? -
Answer THE VEHICLE WEIGHT PLACARD ON THE VEHICLE



WHAT IS ACCEPTABLE FOR VALID REGISTRATION? - Answer - VALID REGISTRATION CARD

- PINK SLIP

- PRINT OUT FROM PENNDOT VEHICLE REGISTRATION WEBSITE



WHAT ENGINE SPEED IS THE VEHICLE OPERATED AT DURING A TWO SPEED IDLE TEST? - Answer
IDLE 400-1250 RPM & 2250-2750 (2500 RPM)



WHAT IS GASOLINE MADE OF? - Answer HYDROGEN & CARBON ATOMS



NAME THE THREE HARMFUL GASES PRODUCED BY A VEHICLE? - Answer CO, HC & NOX



WHAT DO WE GIVE A CUSTOMER THAT FAILS AN EMISSION TEST? - Answer A SIGNED VIR &
REPAIR DATA FORM



WHAT PAPERWORK IS REQUIRED FROM THE CUSTOMER TO DO AN INITIAL EMISSION
INSPECTION? - Answer VALID REGISTRATION ONLY



HOW OFTEN DOES AN EMISSION INSPECTOR HAVE TO RECERTIFY ? - Answer EVERY 2 YEARS



WHAT ARE ACCEPTABLE ENTRIES DURING THE VISUAL ANTI- TAMPERING CHECK FOR EACH
AREA? - Answer PASS, FAIL, N/A NOT APPLICABLE



WHAT ISN'T REQUIRED DURING A 5000 MILES EXEMPTION? - Answer VISUAL INSPECTION,
OBD-II TEST