___________ brake systems use liquid (or fluid) confined in a circuit to transfer mechanical force from the drivers foot to the brake shoes or pads
What is hydraulic
100
What does the term “bobtailing” mean?
What is A tractor running without a trailer
100
In hydraulic brakes, the pads are forced against the rotors by:
What is The pistons inside the wheel cylinders
100
What component is responsible for actuating the opening and closing of valves in diesel engines?
What is camshaft
100
Name four manufacturers of Heavy Duty Diesel Engines that meet emissions standards (that means no CAT Garrett.)
What is Cummins - paccar - detroit - volvo - international
200
Once air exits the air compressor-name one component that the air travel or reaches through before reaching the supply tank?
What is Air dryer or governer
200
What is the purpose of the hold off circuit in an air brake system?
What is Provides air to the main spring to release the parking brake
200
What does hygroscopic mean?
What is Designed to absorb moisture
200
The function of the _________ is to connect the piston assembly with the connecting rod.
What is wrist pin / piston pin
200
What is the name of the component that acts as a lever on an air suspension system that automatically maintains chassis ride height?
What is height control valve
300
Which legislation introduced in 1975 governs all air brake system requirements?
What is FMVSS121
300
The function of which component is to convert brake torque applied to it by the slack adjuster into the linear force that spreads brake shoes and drives them into the drum?
What is S-Cam
300
What is the main purpose of a hydraulic power booster?
What is Assists the master cylinder in applying brakes – requires less effort to apply the brakes
300
In a 4-stroke diesel engine to complete a full 4-stroke cycle how many times must the camshaft rotate?
What is 2 full revolutions
300
What company is the main manufacturer of heavy duty OTR truck transmissions?
What is Eaton Fuller
400
FMVSS requires that governor cut-out be set within a range of what to what?
What is 115 to 135 PSI
400
What SHAPE and COLOR must the system park valve be in current FMVSS121 complaint air brake systems?
What is Yellow and diamond
400
Which type of a brake system would a vehicle have, if it were to contain a metering valve?
What is Disc / Drum brake system
400
What type of turbo charger uses either external or internal controls to determine how gas exhaust gas flows either through or around the turbo housing?
What is VG - variable geometry
400
How many ASE tests are required to become ASE T-series tests must be completed to be considered a master tech?
What is T2-T7 6 tests
500
FMVSS 121 requires that the total volume of compressed air on board the TRACTOR dedicated to the brake system be a minimum of ____ times the total brake chamber volume.
What is 12
500
What is the function of a system safety pop-off valve?
What is It relives pressure from the supply tank in the event of governor cut-out failure
500
In a _____________ hydraulic drum brake system each brake shoe is separately anchored at its heel
What is non servo
500
What emissions component is found in every 2007 + vehicle meeting 2007 emissions standards?
What is DPF
500
In the 1890s ___________ invented an efficient, compression ignition, internal combustion engine that bears his name. What was his name first and last?