PA Safety Inspection Cat 3
The parking brake must hold on what percentage of slope? 20%
Ice grips or studs can not stick out of the tire more then how much?2/32
True or False: A vehicle will fail inspection if all ornamental lights do not work? True
How many fog lamps can a heavy truck have? A heavy truck can have one pair of auxiliary
and fog lamps
What vehicles are allowed to have a wooden plank bumper? Tow trucks & road service
trucks
How close must mudflaps be to the ground? There's no measurement. They simply must provide
adequate covering of the tires
What is the minimum surface area for mirrors on trucks over 10,000 lbs? 50 square inches
True or False: A vehicle fails if there are lights attached to the mudflap? True
What would cause the step well on a bus to fail inspection? If it's cluttered, worn, or presents a
tripping hazard
When can fog lamps operate? With the high beams
What would cause a fifth wheel to fail inspection? If it's cracked, loose, or missing. if the jaws
do not operate.
How much freeplay is allowed for a 22" steering wheel? 2 3/4"
A low vacuum indicator must happen at what reading? 8 in. hg (mercury)
What would cause an air compressor to fail state inspection? Loose mounting bolts or
pulley. Cracked, frayed, or worn belts.
What is an acceptable way of connecting air hoses? By using the proper fittings or couplings
What is the minimum tread depth on front tires for vehicles over 10,000 lbs GVWR? 4/32
To pass inspection, dual tires must be within what diameter of each other? 3/8"
How much movement is allowed on the front or rear of an 18" or larger wheel? Less than 3/8"
How much kingpin movement is allowed on rims under 20"? Over? 1/4" & 1/2"
Would a torque or radius rod fail for loose bushings? No
What two things will cause an air suspension to fail inspection? If the airbag is deflated or
leaking
Where must the exhaust exit on a diesel powered bus? 15 in. forward of the rearmost part of
the vehicle
Drums can not be scored deeper then how much? 0.060"
What is the minimum thickness for bonded, riveted, and bolted lining? 2/32, 1/32, 5/16
What air brake components must be matched across a steer axle? Air chamber size, slack
adjuster length, & retracted pushrod length can not differ by more than 1/2"
Would a heavy truck fail for a non-functioning odometer? No
The parking brake must hold on what percentage of slope? 20%
Ice grips or studs can not stick out of the tire more then how much?2/32
True or False: A vehicle will fail inspection if all ornamental lights do not work? True
How many fog lamps can a heavy truck have? A heavy truck can have one pair of auxiliary
and fog lamps
What vehicles are allowed to have a wooden plank bumper? Tow trucks & road service
trucks
How close must mudflaps be to the ground? There's no measurement. They simply must provide
adequate covering of the tires
What is the minimum surface area for mirrors on trucks over 10,000 lbs? 50 square inches
True or False: A vehicle fails if there are lights attached to the mudflap? True
What would cause the step well on a bus to fail inspection? If it's cluttered, worn, or presents a
tripping hazard
When can fog lamps operate? With the high beams
What would cause a fifth wheel to fail inspection? If it's cracked, loose, or missing. if the jaws
do not operate.
How much freeplay is allowed for a 22" steering wheel? 2 3/4"
A low vacuum indicator must happen at what reading? 8 in. hg (mercury)
What would cause an air compressor to fail state inspection? Loose mounting bolts or
pulley. Cracked, frayed, or worn belts.
What is an acceptable way of connecting air hoses? By using the proper fittings or couplings
What is the minimum tread depth on front tires for vehicles over 10,000 lbs GVWR? 4/32
To pass inspection, dual tires must be within what diameter of each other? 3/8"
How much movement is allowed on the front or rear of an 18" or larger wheel? Less than 3/8"
How much kingpin movement is allowed on rims under 20"? Over? 1/4" & 1/2"
Would a torque or radius rod fail for loose bushings? No
What two things will cause an air suspension to fail inspection? If the airbag is deflated or
leaking
Where must the exhaust exit on a diesel powered bus? 15 in. forward of the rearmost part of
the vehicle
Drums can not be scored deeper then how much? 0.060"
What is the minimum thickness for bonded, riveted, and bolted lining? 2/32, 1/32, 5/16
What air brake components must be matched across a steer axle? Air chamber size, slack
adjuster length, & retracted pushrod length can not differ by more than 1/2"
Would a heavy truck fail for a non-functioning odometer? No
