EMISSIONS STUDY GUIDE EXAM
2026/2027 | PRACTICE QUESTIONS,
ANSWERS & STUDY GUIDE
WHAT IS THE MAIN FUNCTION OF THE EGR VALVE? - correct 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? - correct answer-THE VEHICLE WEIGHT PLACARD ON THE VEHICLE
WHAT IS ACCEPTABLE FOR VALID REGISTRATION ? - correct 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? - correct answer-IDLE 400-1250 RPM & 2250-2750 (2500 RPM)
WHAT IS GASOLINE MADE OF? - correct answer-HYDROGEN & CARBON ATOMS
NAME THE THREE HARMFUL GASES PRODUCED BY A VEHICLE? - correct answer-
CO, HC & NOX
, WHAT DO WE GIVE A CUSTOMER THAT FAILS AN EMISSION TEST? - correct
answer-A SIGNED VIR & REPAIR DATA FORM
WHAT PAPERWORK IS REQUIRED FROM THE CUSTOMER TO DO AN INITIAL
EMISSION INSPECTION? - correct answer-VALID REGISTRATION ONLY
HOW OFTEN DOES AN EMISSION INSPECTOR HAVE TO RECERTIFY ? - correct
answer-EVERY 2 YEARS
WHAT ARE ACCEPTABLE ENTRIES DURING THE VISUAL ANTI- TAMPERING CHECK
FOR EACH AREA? - correct answer-PASS, FAIL, N/A NOT APPLICABLE
WHAT ISN'T REQUIRED DURING A 5000 MILES EXEMPTION? - correct answer-
VISUAL INSPECTION, OBD-II TEST
WHAT IS USED FOR THE MIL ( MALFUNCTION INDICATOR LIGHT )? - correct
answer--CHECK ENGINE LIGHT
-SERVICE ENGINE SOON
-ISO ENGINE SYMBOL
WHEN IS A FAN ADDED TO AN ASM5015 TEST? - correct answer-WHEN
TEMPERATURE IS 72* AND ABOVE
WHAT DOES A PCV VALVE DO? - correct answer-CONTROLS THE BUILD UP OF
CRANKCASE GASES/PRESSURE BY CONTROLLING THE FLOW INTO THE INTAKE
2026/2027 | PRACTICE QUESTIONS,
ANSWERS & STUDY GUIDE
WHAT IS THE MAIN FUNCTION OF THE EGR VALVE? - correct 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? - correct answer-THE VEHICLE WEIGHT PLACARD ON THE VEHICLE
WHAT IS ACCEPTABLE FOR VALID REGISTRATION ? - correct 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? - correct answer-IDLE 400-1250 RPM & 2250-2750 (2500 RPM)
WHAT IS GASOLINE MADE OF? - correct answer-HYDROGEN & CARBON ATOMS
NAME THE THREE HARMFUL GASES PRODUCED BY A VEHICLE? - correct answer-
CO, HC & NOX
, WHAT DO WE GIVE A CUSTOMER THAT FAILS AN EMISSION TEST? - correct
answer-A SIGNED VIR & REPAIR DATA FORM
WHAT PAPERWORK IS REQUIRED FROM THE CUSTOMER TO DO AN INITIAL
EMISSION INSPECTION? - correct answer-VALID REGISTRATION ONLY
HOW OFTEN DOES AN EMISSION INSPECTOR HAVE TO RECERTIFY ? - correct
answer-EVERY 2 YEARS
WHAT ARE ACCEPTABLE ENTRIES DURING THE VISUAL ANTI- TAMPERING CHECK
FOR EACH AREA? - correct answer-PASS, FAIL, N/A NOT APPLICABLE
WHAT ISN'T REQUIRED DURING A 5000 MILES EXEMPTION? - correct answer-
VISUAL INSPECTION, OBD-II TEST
WHAT IS USED FOR THE MIL ( MALFUNCTION INDICATOR LIGHT )? - correct
answer--CHECK ENGINE LIGHT
-SERVICE ENGINE SOON
-ISO ENGINE SYMBOL
WHEN IS A FAN ADDED TO AN ASM5015 TEST? - correct answer-WHEN
TEMPERATURE IS 72* AND ABOVE
WHAT DOES A PCV VALVE DO? - correct answer-CONTROLS THE BUILD UP OF
CRANKCASE GASES/PRESSURE BY CONTROLLING THE FLOW INTO THE INTAKE
