Exam Questions And Actual Answers.
Modulating valve - Answer Control handle on the dashboard that may be used to apply spring brakes
gradually
Some vehicles have a separate air tank that can be used to release the - Answer Spring brake
You need at least what tread on the front tires and what thread on the rear tires - Answer 4/32inch in
front
2/32inch in rear
Steering wheel play of what degree can make it hard to steer - Answer 10 degrees or two inches
If more than one-forth or more leaf springs are leaking - Answer It will put the vehicle out of service
What warning devices for parked vehicles - Answer Three reflective warning triangles, or 6 fuses or 3
liquid burning flares
What should the Pressure build in three minutes and when does the governor cutout - Answer
Pressure should build from 50psi to 90 psi in 3minutes. Governor cut out at 120-140psi
Safety equipment - Answer Spare electrical fuses unless vehicle has circuit breakers, three red
reflective triangles or three red burning flares
Proper idle and operating Oil pressure - Answer 5-20 psi
Operating 35-75psi
Testing for hydraulic leaks - Answer Pump the break pedal three times then apply firm pressure and
hold for 5 seconds the pedal should not move if it does something is wrong
, When should drivers inspect trucks and cargo? B - Answer They must inspect the securement of cargo
within the first 50 miles of a trip and every 150 miles or three hours whichever comes first
Road speed - Answer Mph
Engine speed - Answer Rpm
Retarders - Answer Help slow a vehicle
Four basic types of Retarders - Answer Exhaust,engine, hydraulic, and electric
When should you turn the retarder off? - Answer When your drive wheels have poor traction you
should turn off it in icy snowy or wet conditions.
How far should you look ahead - Answer About 12-15 seconds at lower speeds about a block at higher
speeds about a quarter mile
When should mirror adjustment take place - Answer Before the start of a trip when the trailers are
straight
What are curved mirrors called - Answer Fisheye, spot, bugeye
Turns - Answer Signal early signal continuously and make sure you turn off your turn signal after the
turn
If you stop on any road you must put out your warning devices - Answer Within ten minutes
Two way street warning placement - Answer 100ft ahead 10ft back 100 ft back