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2. Air brake (road vehicle) - Wikipedia

   en.wikipedia.org/wiki/Air_brake_(road_vehicle)

   Truck air-actuated disc brake. An air brake or, more formally, a compressed-air-brake system, is a type of friction brake for vehicles in which compressed air pressing on a piston is used to both release the parking/emergency brakes in order to move the vehicle, and also to apply pressure to the brake pads or brake shoes to slow and stop the vehicle.

3. Transportation Research Center - Wikipedia

   en.wikipedia.org/wiki/Transportation_Research_Center

   Brake Slope & Soak: Contains concrete roadways with grades of 12, 15, 20, and 30% for brake holding, clutch, differential, and durability testing. The brake soak is a 25-foot wide circular water trough containing a 5% slope on the outer edge to allow immersion of only half the vehicle's braking system.

4. Truck driver - Wikipedia

   en.wikipedia.org/wiki/Truck_driver

   Acquiring a CDL requires a skills test (pre-trip inspection and driving test) and knowledge test (written) covering the unique handling qualities of driving a large, heavily loaded commercial vehicle, and the mechanical systems required to operate such a vehicle (air brakes, suspension, cargo securement, et al.), must be declared fit by medical ...

5. Driver's licenses in the United States - Wikipedia

   en.wikipedia.org/wiki/Driver's_licenses_in_the...

   This restriction is issued when a driver either fails the air brake component of the general knowledge test or performs the CDL road skills test in a vehicle not equipped with air brakes. M: CDL-A holders may operate CDL-B school buses only. N: CDL-A and CDL-B holders may operate CDL-C school buses only. O: Driver limited to pintle hook ...

6. Commercial driver's license - Wikipedia

   en.wikipedia.org/wiki/Commercial_driver's_license

   A commercial driver's license is required to operate a tractor-trailer for commercial use. A commercial driver's license (CDL) is a driver's license required in the United States to operate large and heavy vehicles (including trucks, buses, and trailers) or a vehicle of any size that transports hazardous materials or more than 15 passengers (including the driver).

7. Ohio cattle test positive for bird flu. What is avian flu and ...

   www.aol.com/ohio-cattle-test-positive-bird...

   The Ohio Department of Agriculture confirmed an Ohio cattle herd in Wood County has tested positive for bird flu. The test result is awaiting confirmation from the U.S. Department of Agriculture.