Class D License Study Guide
- engine on, allow air pressure to build up
- turn engine off, fully apply foot brake for one minute
- check to see if pressure drops more than 3 lbs in one minute - ANS-Checking Air Brake
System Step One
- turn key to ON position without turning engine on
- rapidly apply and release foot brake - ANS-Checking Air Brake System Step Two
("mud flap") - ANS-Every truck must have a device (1) to minimize the spray or splash of water
or mud or loose road surface material to the rear.
• Three (3) flares, three (3) electric red lanterns OR three (3) red portable reflectors.
• Two (2) 12-inch square red cloth flags with standards. - ANS-Freight carrying vehicles and
passenger buses must carry:
1 too much pressure
2 150psi
3 60psi - ANS-safety valve protects tank and system from (1) and is usually set to open at (2).
Warning signal will come on at (3) if tank falls below that pressure
1. The brakes are very hot (from having come down a steep grade).
2. The brakes are very wet in freezing temperatures. - ANS-use the parking brakes unless:\
1) 100 feet behind
2) 100 feet forward
3) center of the lane or shoulder
4) 10 feet to the front or rear. - ANS-One signal must be placed (1) the vehicle and (2) of the
vehicle. Each of these signals must be in the (3). A third signal must be on the traffic side of the
truck (4).
1) 1000 feet to the rear
2) 600 feet
3) 500 feet - ANS-· Tail lights must be visible for (1).
· Reflectors must be visible from (2).
· Clearance lights must be visible from (3).
1) 15 feet. - ANS-When towing another vehicle, the draw bar or other connection must of
sufficient strength to pull all towed weight and must not exceed (1)
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