Figure 5.2: Drum Brake - Long Description

The drum brake is a circular object called a brake drum, with a brake chamber attached to the side. Inside the brake drum is an axle which turns the brake. This axle is attached to a brake cam, which in turn is attached to a cam roller, which in turn is attached to a brake and the brake shoe lining. The brake cam is attached via a return spring, adjusting nut and slack adjuster.

Figure 5.4 - Long Description

Tractor

The hand valve is attached to a pressure gauge and highway valve. Both of these are attached to a foot valve, which in turn, is attached to the front brakes. The foot valve and hand valve is also attached to two main reservoirs: dry and wet, a compressor and a one-way check valve. The Wet Main Reservoir is attached to a safety valve and low pressure warning buzzer and switch. This series of components are attached to the parking brake and emergency brake valve (yellow), the tractor parking brake valve (blue), emergency valve and parking maxi-brake and spring brake.

The Highway valve and the other components are linked to a tractor valve which is then links to the Trailer.

Trailer

The Tractor valve in the Tractor components is linked to a service line and emergency Glad Hanges, which are both linked to an emergency relay valve. This emergency relay valve is linked to the trailer reservoir, and the trailer brake chambers and a quick release valve.

Figure 5.6 - Long Description

At 15 mph a truck has a perception travel distance of 39 feet, reaction travel distance of 16 feet, braking lag travel distance of 9 feet,  and a braking travel distance of 17 feet for a total of 81 feet traveled from when seeing an obstacle and stopping the truck.

At 25 mph a truck has a perception travel distance of 65 feet, reaction travel distance of 28 feet, braking lag travel distance of 15 feet, and a braking travel distance of 47 feet for a total of 155 feet traveled from when seeing an obstacle and stopping the truck.

At 35 mph a truck has a perception travel distance of 91 feet, reaction travel distance of 39 feet, braking lag travel distance of 21 feet, and a braking travel distance of 92 feet for a total of 243 feet traveled from when seeing an obstacle and stopping the truck.

At 45 mph a truck has a perception travel distance of 117 feet, reaction travel distance of 50 feet, braking lag travel distance of 27 feet, and a braking travel distance of 152 feet for a total of 346 feet traveled from when seeing an obstacle and stopping the truck.

At 55 mph a truck has a perception travel distance of 142 feet, reaction travel distance of 61 feet, braking lag travel distance of 32 feet, and a braking travel distance of 216 feet for a total of 451 traveled from when seeing an obstacle and stopping the truck.

Figure 6.1: Influence of combination type on rearward amplification - Long Description

5 axle tractor semitrailer with 45 feet has a rearward amplification of 1

3 axle tractor semitrailer with 27 feet has a rearward amplification of 1.25

Turnpike double 45 feet trailers has a rearward amplification of 1.2

B-train double 27 feet trailers has a rearward amplification of 1.4

Rocky mountain double - 45 feet has a rearward amplification of 1.5

California truck full trailer has a rearward amplification of 1.8

65 feet conventional double - 27 feet has a rearward amplification of 2

Triple 27 feet trailers has a rearward amplification of 3.5

Figure 7.1 - Long Description

The lead trailer is attached to the rear trailer by the ring hitch which is attached via air hoses to the converter gear. The fifth wheel is located here. At the front of the rear trailer are the air and electrical connections. Under the front of the rear trailer is the kingpin and the landing gear.

Figure 9.6: Shipping paper - Long Description

Shipping paper, consists of seven rows.

First row

  • To: ABC Corporation, 88 Valley St, Anywhere VA
  • From: DEF Corporation, 55 Mountain St, Nowhere CO
  • Page 1 of 1

Second and third rows

  • Quantity: 1 cylinder
  • HM: RQ ("RQ means that this is a reportable quantity)
  • Description: UN1076, Phosgene, 2.3, Poison, Inhalation Hazard, Zone A (UN1076 is the Identification Number from Column 4 of the Hazardous Materials Table.) (Phosgene is the proper shipping name from Column 2 of the Hazardous Materials Table.) (2.3 is the Hazard Class from Column 3 of the Hazardous Materials Table.) 
  • Weight: 25 pounds

Fourth row:

This is to certify that the above named materials are properly classified, described and packaged marked and labeled, and are in proper condition for the transportation according to the applicable regulations of the United States Department of Transportation.

Fifth, sixth and seventh row, first two columns:

  • Shipper: DEF Corporation
  • Per: Smith
  • Date: October 15, 2003

Fifth, sixth and seventh row, last two columns:

  • Carrier: Safety First
  • Per:
  • Date

Text at bottom: Special instructions: 24 hour Emergency Contact, John Smith 1-800-555-5555

Figure 10.1 - Long Description

When parked, a school bus should be at least ten feet on the left fron passing cars, as these pose a danger. The 10 feet infront and behind the bus are the most dangerous, from the beginning of the cab forwards to about halfway down the end of the bus. Walking area should be to the right and front only.

Combination vehicles - Long Description

A combination vehicle consists of:

Front of vehicle:

  • Lights and reflectors
  • Engine compartment and steering components

Steering Axle

  • Suspension
  • Brakes
  • Tires

Driver door

Fuel Area

Drive Axle(s)

  • Suspension
  • Brakes
  • Tires

Coupling Devices

  • Truck
  • Trailer

Trailer Components, Front, Side, Lights and Reflectors

  • Frame
  • Landing gear
  • Tandem (unknown word)

Trailer axle(s)

  • Suspension
  • Brakes
  • Tires

Rear of Trailer and lights and reflectors

Straight truck or bus - Long Description

Front of vehicle

  • Lights and reflectors
  • Engine compartment and steering components

Steering Axle

  • Suspension
  • Brakes
  • Tires

Driver door

Fuel Area

(Truck)

Under Vehicle

  • Drive Shaft
  • Exhaust
  • Frame

Drive Axle(s)

  • Suspension
  • Brakes
  • Tires

Front right of vehicle:

  • Passenger door
  • Fuel area

Basic Control Skills Dimensions - Long Description

The scale is 10 feet by 10 feet, with a minimum length of 260 feet, consisting of three sections: minimum of 80 feet, 100 feet and minimum of 80 feet, with a width of 40 feet consisting of two sections: 26 feet and 14 feet. Within this, is a section for reversing which is 12 feet wide by 100 feet long. There is an area only 60 feet long into which the truck needs to reverse, with 3 feet at each end. The length of this opening is 140 feet from the edge of the scale.