QUESTIONS WITH ANSWERS GRADED A+
✔✔How long does it take to stop a heavy vehicle going 55 mph on a dry level road? -
✔✔About the length of a football field or about six seconds
✔✔Oh, what should you do if your vehicle hydroplanes? - ✔✔Release the accelerator
and push in the clutch
✔✔There are two types of drains What kind are they? - ✔✔The two types of drains are
manually or automatic operated
✔✔What could happen if oil and water get in the air tanks? - ✔✔The brakes can fail
✔✔Air compressor governor does what? - ✔✔It controls when the compressor will
pump air into the air storage tanks
✔✔How does brake systems work? - ✔✔Compressed air is used to make the brakes
work
✔✔When should the tanks be drained if not equipped with automatic drains? - ✔✔Every
day
✔✔Emergency brakes are held back by what? - ✔✔The air pressure
✔✔The air compressor has what job to do? - ✔✔The air compressor pumps air into the
air storage tank
✔✔What turns the stop light on in air brake equipped vehicle? - ✔✔An electric switch
that works by air pressure
✔✔What is the alcohol evaporator job consist of? - ✔✔It reduces risk of ice and breaks
valves in other parts in cold weather
✔✔In what direction does the S -Cam travel with the brakes are applied? - ✔✔Presses
them against the inside of the brake drum
✔✔Where is the foundation break located? - ✔✔At each wheel
✔✔When the brake lining is pressed against the drum, what would happen? - ✔✔This
causes friction which slows the vehicle and creates heat
✔✔In cold weather, how often is the alcohol evaporator checked? - ✔✔Check the
alcohol container and fill up as necessary every day
, ✔✔If the brake pedal is fanned, what can happen? - ✔✔Air Canobie Lake out of the
system faster than the compressor can replace
✔✔What gauge is required for air brakes? - ✔✔Air pressure gauge
✔✔In the first thing there is a safety release valve. What is its job? - ✔✔It protects the
tank in the rest of the system from too much pressure
✔✔Where could you find the air tanks drain valve? - ✔✔Each tank at the bottom of the
tank
✔✔what are the names of the brake pedal? - ✔✔It can be called the foot valve or
treadle valve
✔✔ Hydraulic brakes? - ✔✔Pump brakes 3 times than apply firm pressure to the pedal
and hold for 5 seconds
✔✔brake system? - ✔✔Place vehicle in lower gear, gently pull forward against parking
brake to make sure parking brakes hold
✔✔During trips you should check ? - ✔✔Instruments, mirrors, air pressure gauges,
tires, temp gauge cargo, cargo covers, lights, ammeter, and volmeter
✔✔Air gauge build air pressure to governor cut off roughly? - ✔✔120-140 psi
✔✔Oil pressure idling psi? - ✔✔5-20 psi
✔✔Oil pressure operating psi? - ✔✔35-75 psi
✔✔Oil pressure should be up to normal in? - ✔✔Seconds
✔✔Tractor and straight truck spring will come on fully on when air pressure drops to a
range of? - ✔✔20-45 psi
✔✔One way or divided highway place warning device? - ✔✔10 ft, 100 ft, 200 ft forward
approaching traffic
✔✔Two way or undivided highway place warning devices? - ✔✔10 ft, 100 ft, behind and
100 ft in the front
✔✔Obstructed view or around curves place warning device? - ✔✔10 ft, 100ft, and 500 ft
toward the approaching traffic