MARYLAND STATE INSPECTION QUESTIONS AND
ANSWERS GRADED A+
✔✔Non Critical area reject for - ✔✔cracks extending 2 inches one or combined
cracks over 4 inches on wrap around winshield
cracks in excess of 3/4 inch
✔✔Hood and catches reject for - ✔✔Hood scoop higher than 1/3 vertical height of
windshield
missing catches or not original or equivalent
✔✔Door handles and latches inspect for - ✔✔proper operation
proper adjustment
secondary or safety catches
✔✔Speedometer/odometer reject for - ✔✔illegible dials and calibration
does not register speed in miles or kms
odometer does not register distance travelled
✔✔Front seat belts - ✔✔June 01 1964
✔✔Rear seat belts - ✔✔June 01 1969
✔✔Seat belts Reject for - ✔✔Frayed split or torn
retracting or release mechanisms inoperative
✔✔Load cover regulation does not apply to - ✔✔Class K(farm area) vehicle
Class E(truck) vehicle
Vehicle within the port of baltimore not to exceed one mile
✔✔Reject load cover for - ✔✔not securely attached
securement hardware missing
load cover touching enclosure or within 6 inches of top
✔✔Trailer air suspension reject if - ✔✔air begins to lift vehicle before 55psi
leakage greater than 3psi in 5 minutes
✔✔Trailers under 3000 ponds GVWR - ✔✔not required to have brakes
✔✔Trailers 3001 to 10000 GVWR - ✔✔required to have brakes onon all wheels of at
least one axle
✔✔Trailers over 10000 pounds GVWR - ✔✔required to have brakes on all wheels
, ✔✔Bonded linings on trailer - ✔✔reject below 2/32 of an inch(same as car)
✔✔Riveted linings on trailer - ✔✔Reject if below 2/32 of an inch above any rivet
✔✔trailer brake master cylinder - ✔✔reject if half full of brake fluid in any section
✔✔Trailer electrical brakes inspection - ✔✔insert low range DC ammeter in circuit
between controller and brakes ammeter should read ZERO with controller in OFF
position. Divide ammeter reading by number of brakes.
✔✔Electric trailer brakes for - ✔✔maximum amperage per brake is more 20% or more
than 30% below brake manufacturers maximum current rating.
✔✔Trailer Emergency Brakes required on - ✔✔trailers 3000 pounds and above
manufactured after June 01 1970 to remain applied 15 minutes on breakaway from tow
vehicle
✔✔Trailer tire tread failure-same as Class A - ✔✔Tire tread groove worn less than 2/32
inch on any three locations spaced approx equally on tire
Tread wear indicators contact the road in two adjacent grooves at three locations
spaced equally around the tire.
✔✔Tandem trailer tire Failure - ✔✔Diameter of one of the duals is not within 1/2 inch of
the other.
If a gauge block can be inserted between the tire and caliper.
✔✔Do not reject tires for - ✔✔difference in brand or tread design
✔✔Reject tires for - ✔✔significantly larger sizes that require suspension modification to
prevent tire body contact
✔✔Every trailer 3000 pounds and over - ✔✔must be equipped with ICC bar not more
than 30 inches above highway when vehicle is moving with a frame not exceeding 18
inches.
✔✔550 rule - ✔✔5 years 50000 miles
✔✔Catalytic converters - ✔✔any vehicle under the 550 rule should have the catalytic
converter replaced with OEM
✔✔Fuel filler inlet restricter - ✔✔should be not larger than 0.950 inch
✔✔PCV system - ✔✔Inspect for presence and condition
ANSWERS GRADED A+
✔✔Non Critical area reject for - ✔✔cracks extending 2 inches one or combined
cracks over 4 inches on wrap around winshield
cracks in excess of 3/4 inch
✔✔Hood and catches reject for - ✔✔Hood scoop higher than 1/3 vertical height of
windshield
missing catches or not original or equivalent
✔✔Door handles and latches inspect for - ✔✔proper operation
proper adjustment
secondary or safety catches
✔✔Speedometer/odometer reject for - ✔✔illegible dials and calibration
does not register speed in miles or kms
odometer does not register distance travelled
✔✔Front seat belts - ✔✔June 01 1964
✔✔Rear seat belts - ✔✔June 01 1969
✔✔Seat belts Reject for - ✔✔Frayed split or torn
retracting or release mechanisms inoperative
✔✔Load cover regulation does not apply to - ✔✔Class K(farm area) vehicle
Class E(truck) vehicle
Vehicle within the port of baltimore not to exceed one mile
✔✔Reject load cover for - ✔✔not securely attached
securement hardware missing
load cover touching enclosure or within 6 inches of top
✔✔Trailer air suspension reject if - ✔✔air begins to lift vehicle before 55psi
leakage greater than 3psi in 5 minutes
✔✔Trailers under 3000 ponds GVWR - ✔✔not required to have brakes
✔✔Trailers 3001 to 10000 GVWR - ✔✔required to have brakes onon all wheels of at
least one axle
✔✔Trailers over 10000 pounds GVWR - ✔✔required to have brakes on all wheels
, ✔✔Bonded linings on trailer - ✔✔reject below 2/32 of an inch(same as car)
✔✔Riveted linings on trailer - ✔✔Reject if below 2/32 of an inch above any rivet
✔✔trailer brake master cylinder - ✔✔reject if half full of brake fluid in any section
✔✔Trailer electrical brakes inspection - ✔✔insert low range DC ammeter in circuit
between controller and brakes ammeter should read ZERO with controller in OFF
position. Divide ammeter reading by number of brakes.
✔✔Electric trailer brakes for - ✔✔maximum amperage per brake is more 20% or more
than 30% below brake manufacturers maximum current rating.
✔✔Trailer Emergency Brakes required on - ✔✔trailers 3000 pounds and above
manufactured after June 01 1970 to remain applied 15 minutes on breakaway from tow
vehicle
✔✔Trailer tire tread failure-same as Class A - ✔✔Tire tread groove worn less than 2/32
inch on any three locations spaced approx equally on tire
Tread wear indicators contact the road in two adjacent grooves at three locations
spaced equally around the tire.
✔✔Tandem trailer tire Failure - ✔✔Diameter of one of the duals is not within 1/2 inch of
the other.
If a gauge block can be inserted between the tire and caliper.
✔✔Do not reject tires for - ✔✔difference in brand or tread design
✔✔Reject tires for - ✔✔significantly larger sizes that require suspension modification to
prevent tire body contact
✔✔Every trailer 3000 pounds and over - ✔✔must be equipped with ICC bar not more
than 30 inches above highway when vehicle is moving with a frame not exceeding 18
inches.
✔✔550 rule - ✔✔5 years 50000 miles
✔✔Catalytic converters - ✔✔any vehicle under the 550 rule should have the catalytic
converter replaced with OEM
✔✔Fuel filler inlet restricter - ✔✔should be not larger than 0.950 inch
✔✔PCV system - ✔✔Inspect for presence and condition
