B.M.C.S
Bureau of Motor Carrier Safety.
BAC
(Blood alcohol concentration), Results of a test for alcohol in the
blood. The relative proportion of ethyl
alcohol in the blood stated in terms of the number of milligrams of alcohol in
100 milliliters of blood (weight / volume).
In nearly all states, 0.10 percent BAC is considered the limit for legal
intoxication. In Kansas the limit is
0.8 percent.
BACK HAUL
(1) The return part of the trip (2) the freight that is carried on the
return portion of a trip (3} a shipment
that is carried back over part of a route that has been previously traveled.
BACKLIGHT
The window across the rear of any automobile,
regardless of body style. Sometimes called back window.
BACK-UP AIR SIGNAL
Warning whistle which can be operated at the rear
of the train when backing up. Air for
its operation is taken from the train line.
BAD ORDER
Car in need of repair.
BALL JOINT
A ball joint in the suspension of a vehicle
comprises a stud, housing, boot, reloading spring, pressure plate, and
insert. In the suspension, two ball
joints are used at each wheel to form a pivot axis about which the wheel turns
in steering. In other applications, a
ball joint is a connection between parts which allows one part to rotate about
a fixed point in the other part. Thus,
a ball joint can transmit forces, but it cannot transmit any torque.
BALLAST
Selected material placed on the road bed to hold
the track in line. Ballast preferably
consists of hard particles easily handled in tampering, which distributes the
load, drain well, and resist plant growth.
BALLAST CAR
A car for carrying ballast for repair and
construction work, usually a gondola or hopper.
BALLAST TAMPER
A machine for compacting ballast under the ties.
BALLOON FREIGHT
Light, bulky cargo.
BAND PLY
The first ply on the inside of a tire.
BANK
The degree to which the outside edge of a roadway
is higher than the inside edge at a specified point on a curve; the change in
elevation per unit of distance across the roadway from the inside curve to the
outside edge; superelevation.
BAO
Body and Assembly Organization.
BARRIER COLLISION TEST
A number of Federal hater Vehicle Safety Standards
require that a vehicle be tested in a collision with a fixed barrier, in
accordance with the Society of Automotive Engineers Recommended Practice J850,
"Barrier Collision Tests."
BARRIER LINE
A line which, when placed parallel to a center or
lane line, indicates that no traffic may cross the line for purposes of
overtaking and passing; "a double line consisting of two normal solid
yellow lines delineating the separation between travel paths in opposite directions
where overtaking and passing is prohibited in both directions; a two direction
no passing marking.",
BASE STATE
The state in which a vehicle is primarily
registered..
BATTERY
An electrochemical device for storing and supplying
electrical energy
BBC
The length of the tractor from the bumper to the
back of the cab. Always stated in inches.
BC DIMENSION
Distance from back of cab to end of frame.
BEAD (TIRE)
The inner edge of the outer wall of a rubber tire,
fitting on the rim. The
"foundation" of a tire. It is
made of high tensile steel wires and wrapped and reinforced by the plies.
BEAD BASE
The approximately cylindrical portion of the bead
that forms its inside diameter.
BEAD MOLDING
A molding with a small cross-section of any length.
BEAD SEAT (TIRE)
The bead seat is the part of the wheel rim into
which the best of the tire is mounted.
BEAD SEPARATION
(TIRE)
Bead separation is a breakdown of the bond between
components in the bead area.
BEAD TOE
That portion of the bead which joins the bead base
and the inside surface of the tire.
BEAD-TO-SEAT MEASUREMENT
The distance from the heel of one bead straight up
at 90- to the bead over the crown and down the other side to a position on the
heel of the other bead directly opposite the starting point.
BEAMING
A mode of vibration involving predominantly bending
deformations of the sprung mass about the vehicle y-axis.
BEANERY
A railroad eating house.
BEARING
A relative degree of surface contact between one
die member and another.
BEAUTY BOLTS
Exposed, large, round, bright bolt heads on the
surface of bumpers. Also used to identify similar parts of station wagon
simulated-wood side treatment. The "beauty" in this context is
ironic.
BELT DRIVE AXLE
An axle driven by V-belts, which transmit power
from the drive axle. See Y-belt drive.
BELT DRIVEN AXLE
An axle driven by V-belts, which transmits power
from the drive axle
BELT LINE
A short railroad operating within or around a city.
BELT PLAYOUT
The length of the belt that leaves the retractor
spool prior to the belt locking mechanism engaging as a result of an
impact. Typical belt playout is 2.5 - 5
cm (1/2 inches).
BELT STRETCH
The lengthening of the lap or shoulder belt due to
dynamic loading during impact. Typical
belt stretch is 15cm (6 inches) in a 48 KHP (30 mph) barrier equivalent impact.
BELT WORK LINE
Arbitrary horizontal work line usually located at
approximately the 35 inch line and commonly shown as BWL.
BELTED (TIRES):
A belted tire is a tire in which an outer layer, or
belt, of class, steel or rayon fibers, is wrapped around the circumference of
the tire just beneath the tread.
BELTED CONSTRUCTION
A type of tire construction which includes one or
more reinforcing belts of fabric or steel. These belts run circumferentially
around the crown of the tire.
BELTLINE
The line established by the upper edge of the car lower body at the
glass openings, as seen from the side.
BEND
See crook
BENDING MOMENT
The product of force and distance from point of
support to point where force is applied causing bending or distortion.
BENDIX DRIVE
Drive mechanism on cranking motor.
"B" END OF CAR
The end of which the hand brake is located.
BERM
The shoulder of the road.
BERM
See shoulder
BEVEL GEAR
Gear used to transmit power at angle.
BEZEL
A frame, escutcheon, or rim, usually surrounding a
lamp or opening. Either bright-finished or painted.
bhp
Brake horsepower.
BIAS-PLY
Construction where cords run diagonally to the tire's
bead or direction of rotation. In conversation, "bias-ply" has come
to mean an old-style tire.
BICYCLE
A two wheeled pedal cycle.
BICYCLE
A two wheeled pedal cycle.
BIG HOLE
(slang) Emergency position on the air brake valve.
BILL OF LADING
(B/L) The
written transportation contract between shipper and carrier (or their agents)
. It identifies the freight, who is to
receive it and the place of delivery and gives the terms of the
assignment. All goods going to a
receiver at one destination in a single shipment or on one truck must be on a
single bill of lading. The straight
bill of lading provides that freight be delivered to the receiver shown on the
bill. It is non-negotiable. Surrender of this type of bill of lading is
not required except when it is necessary for the receiver to identify
himself. This might be necessary for
example, for certain bonded goods such as liquor. Always printed on white paper.
The other bill of lading is negotiable.
Its purpose is to enable a shipper to collect for the shipment before it
reaches its destination. The shipper
sends an original bill of lading and draft for the charges through a bank. The receiver pays the carrier's agent the
amount of the draft and then and then can receive the goods. With this method, the shipper customarily
consigns the shipment to himself. The
person or company to be notified at destination is specified. The shipment may
be released to the receiver only upon the order of the shipper. The order bill of lading must be surrendered
with delivery of the freight. Always
printed on yellow paper. Either
straight or order bills of lading me be designated as "through" . A through bill of lading covers shipment by
more than one transportation company at a fixed rate for the entire
service. More than one type of
transportation company (such as truck or rail) may be utilized. All see clean bill of lading.
BILL OF SALE
A contract for the sale of goods.
BILLED WEIGHT
The weight shown in a freight bill.
BILLET CAR
A low side gondola car built of steel throughout
for transportation of hot steel billets.
BILLING POINT
Location where the waybill is prepared.
BILLING REPAIR CARD
The card furnished to the car owner when repair
work is done on a foreign car.
BINDER WHIP
A distortion in panel surfaces resulting from an improper binder configuration. Metal
is permitted to crowd together and subsequent draw is insufficient to remove
the bruise.
BINGO CARD
See cab card
BIOMECHANICS
The study of energy and forces and their relation
to motion, deformation or equilibrium of human and other living entities. The analysis of action of forces on
biological materials or biological systems.
BISCUIT
Rectangular sewn area on a seat or door panel.
BITUMINOUS CONCRETE
Concrete cemented with a bituminous material such
as tar or asphalt.
BLADE
A thin,, sharply defined ridge in the body metal,
or an appliqué of a similar nature.
BLANKET WAY BILL
A waybill covering two or more consignments of
freight
BLASTING AGENTS
See hazardous material
BLEED THE AIR TANKS
To drain the accumulated water out of the air tanks
of a tractor to prevent the condensed water from reducing air tank capacity and
thus cutting braking efficiency.
BLEED THE FUEL LINES
To remove
trapped air from the fuel lines.
BLIND QUARTERAN
Unusually wide "C" pillar or roof
quarter, tending the enclose rear seat area.
BLIND SIDE
The right side of the truck and trailer, opposite
of the site side.
BLIPS
Small ornamentation in series; I.e., several
identical ports, bars, windsplits, etc., aligned horizontally or vertically on
the body.
BLOCK
1) A length of track of defined limits. 2) A group
of cars classified for movement to the same yard or terminal.
BLOCK SIGNAL
A signal at the entrance of a block to govern
trains and engines entering and using that block.
BLOCK SIGNAL SYSTEM
A method of governing the movement of trains into
or within one or more blocks by the use of signals.
BLOCKING
Supports used to prevent cargo from shifting during
transportation.
BLOOM
Bleeding rubber-oils surface and discolor.
BLOWBY
Engine gases leaking past the piston rings and/or
valves and entering the crankcase. Overflow.
BLOWER
(1) A device that forces additional air into the
engine to increase its efficiency and horsepower. Two types of blowers are the supercharger and the turbocharger;
(2) A fan that blows air over ice to maintain a low temperature in a trailer
transporting perishable goods.
BLOW-OFF VALVE
A regulatory valve on the air system that allows
the escape of excess air pressure if the governor on the air compressor fails
to operate.
BLUE BUCK/BODY-IN-WHITE
an incomplete assembly of a vehicle generally
consisting of the major body panels welded together and in a state prior to
prime and paint processing.
BLUE LABEL
See hazardous material
BLUE-LINE DRAWING
A print reproduced, usually on paper, by an ammonia
developing process. Also known as "print" or "blueprint".
BMD
Basic Manufacturing Division
BMEP
Brake mean effective pressure.
BOARD
A fixed signal regulating railroad traffic and
usually referred to as a slow board, order board, clear board, or red board.
BOARDING CAR
A term commonly applied to a car used as a place of
lodging for workmen. In the case of
wreck trains, they are more often called dinning and sleeping cars.
BOBTAIL
A tractor without a trailer; or a single truck.
BODY
Structure mounted on chassis for cargo or
passengers.
BODY CENTER PLATE
The center plate attached to the underside of the
body bolster. See center plate.
BODY FRAMING
Area designated as such for the assembly of the
body shell.
BODY HARDWARE
Door handles, window operating cranks, locks,
hinges, ventilation knobs, mirrors, and other functional and appearance metal
parts.
BODY LOCK PILLAR
The body pillar that contains the lock striker
plate. Usually is integral with center pillar of rear quarter assembly.
BODY OPENING
Opening in the body surface to match the edges of
doors, tailgates, etc.
BODY SIDE MOLDING
Usually narrow plastic part attached to doors to
protect body sides from damage.
BODY TYPE
The general configuration or shape of a vehicle
distinguished by characteristics such as the number of doors, seats, or
windows, roof line, hard top, convertible, etc.
BOGEY
(Bogie)
1) Usually an axle added to a tractor to carry more
weight as weight distribution. 2) The
running gear of a highway semi-trailer which may be removed. 3) The term used generally to mean swivel
railway truck.
BOGIES
An assembly of two or more axles, such as a tandem
axle.
BOLSTER
1) A cross member on the under side of a car body
and in the center of a truck, through which the weight is transmitted. The bolsters carry the body and truck center
plates, the body bolster resting on the truck bolster, and is connected to it
with a center pin. 2) The portion of
the seat which rolls over or forms the upper most part of the seat-back or the
leading edge of the seat itself.
BOLT AND BOND ASSEMBLY
A method of attaching parts or sub-assemblies
together by bolting and applying adhesive instead of welding.
BOLT CIRCLE
The diameter of the circle which traces through the
centerline of the bolt holes. It defines the bolt hole spacing around the disc
in a wheel.
BONDED WAREHOUSE
A warehouse approved by the US Treasury Department
and under bond or guarantee of the strict observance of the revenue laws. Also utilized for storing goods until duties
are paid or otherwise released.
BONNET
The protective covering over the air intake that
keeps water or other substances from entering the air system; or the hood on
any conventional type tractor.
BOOM
A high intensity vibration (25-100 Hz) perceived
audibly and characterized as sensation of pressure by the ear.
BOOM IT DOWN
(slang) : Tighten
chains around freight.
BOOMERS
(slang) See chain binders.
Pressure of air above atmospheric pressure created by the turbocharger. ( Detroit )
BOOT
Folding top storage area (convertible).
BOOTLEG POCKET
Pocket at the rear of the rear wheel house formed
by the quarter panel and at the quarter panel-to-pan filter.
BORE
The diameter of a cylinder.
BORE & STROKE
Bore is the diameter of a cylinder; the stroke is
the maximum distance a piston moves during one complete stroke.
BOTTLER'S BODY
A truck body designed for hauling cased, bottled
beverages.
BOTTOM DEAD CENTER
Lowest point of periphery of flywheel when
crank-throw is in lowest position.
BOTTOM DUMP
Trailer body designed to dump its cargo through
gates in the bottom or floor of the trailer.
BOTTS DOTS
Botts dots are raised pavement markers used to
delineate separate lanes, shoulders or center dividers.
BOUNCE
The amount of springiness in a vehicle as a result
of impact crash. The deformed materials
will expand after the maximum deformation (dynamic crush) to "settle"
in at the static crush value. A vehicle
impacted into an immoveable barrier will "bounce" back from the
barrier coming to rest away from the barrier.
BOX CAR
An enclosed car used for general service and
especially for lading which must be protected from the weather.
"B" PILLAR
Second pillar in roof, counting from the
windshield.
BRAKE
A brake is any mechanism used to retard, stop or
hold a vehicle in place. It is usually applied at the drive shaft or wheels of
a vehicle and converts energy to heat by means of friction.
BRAKE ACTUATION TIME
Brake actuation time is the time between
application of pedal pressure in an air brake system and the time the brake
chamber pressure reaches 60 psi.
Current Federal Motor Vehicle Safety Standard).
BRAKE ANCHOR
The brake anchor is the pivot pin on the backing
plate of the brake against which the brake shoe bears.
BRAKE APPLICATION VALVE
A control unit which controls air pressure to the
brake cylinders or brake chambers.
BRAKE BAND
The brake band is ú band which surrounds the brake
drum to which the brake lining is attached.
BRAKE BLEEDINGS
Brake bleeding is a procedure for removing air from
the lines of an hydraulic system in an automobile.
BRAKE BOOSTER
A vacuum mechanical means for increasing brake
pedal pressure.
BRAKE BURNISH
A conditioning of a brake's friction surfaces by
wear and temperature, either by a test procedure or in-service operation.
BRAKE CHAMBER
A unit in which a diaphragm converts pressure to
mechanical force for actuation of the brake.
BRAKE CLUB
Three foot hickory stick used by freight trainman
to tighten hand brakes.
BRAKE COUNT
The number of times the service brake was applied. ( Detroit )
BRAKE CYLINDER
A brake cylinder is a cylinder in which a piston
converts hydraulic pressure to mechanical force in order to move the brake
shoes in a brake assembly against the braking surface of either a drum or a
disc brake rotor plate.
BRAKE DIAPHRAGM
Bellows-type chamber used to convert comp=air
pressure to mechanical force.
BRAKE DISC
A brake disc is a circular plate against which a
brake lining is forced by hydraulic pressure.
The purpose of this is similar to the purposes of the brake assembly
described under the brake cylinder.
BRAKE DRUM
The brake drum is the cylindrical portion of the
inside of the wheel, usually metal such as cast iron, to which the friction
Material of the brake shoe is applied in stopping a vehicle.
BRAKE EFFICIENCY
There are two definitions for braking
efficiency: 1. Braking efficiency is the ratio of the force
necessary to cause the braked wheels of a vehicle to rotate, divided by the
weight of the vehicle, expressed as a percent.
2. Braking efficiency is the
ratio of the deceleration which is produced by a braking system divided by the
maximum acceleration possible with the available coefficient of friction
between tires and road. The efficiency
can be expressed as a ratio, or as a percent.
BRAKE FADE
Brake fade is a condition where repeated
application of the brakes causes a loss of frictional ability due to heating
which results in the impairment of braking efficiency.
BRAKE FLUID
A special oil used in the hydraulic braking system
to transmit pressure through a closed system of tubing known as the brake lines
BRAKE FORCE - ATTEMPTED
The force that is capable of being produced by the
mechanical components.
BRAKE FORCE - AVAILABLE
The force available is identified by multiplying
the load on the braked wheel by the truck tire / roadway surface friction
interface.
BRAKE HOP
An
oscillatory hopping motion of a single wheel or of a pair of wheels which
occurs when brakes are applied in forward or reverse motion of the vehicle.
BRAKE HORSEPOWER
When referring to the power of an engine, brake
horsepower is the power output of the engine.
BRAKE HOSE
A brake hose is a reinforced, flexible hose,
usually made of reinforced rubber, which connects the solid metal part of the
hydraulic system (attached to the body or frame) to the moving part of the
brake system. She moving part is usually connected directly to the brake wheel
cylinder.
BRAKE LIMITING VALVE
A valve in the brake application system which
limits the maximum permissible pressure passed on to the front axle brakes.
BRAKE LINE
A brake line is the metallic part of the hydraulic
brake system of a vehicle. It is
comprised of metallic tubing and fittings.
Usually, there are four brake lines, running from the master cylinder
(or from an equalization switch near the master cylinder) to a point near each
wheel, Brake hoses are used to connect
the brake lines to the wheel cylinders.
BRAKE LINING
The brake lining is the material which is attached
to the brake shoe and which in the process of braking contacts the brake drum
in order to retard or bring the vehicle to a stop. The material used for the brake lining must have a suitable
coefficient of friction.
BRAKE MAN
A train service employee who assist with train and
yard operations.
BRAKE PAD
A flat metal piece with a brake lining which is
forced against the rotor of a disc brake to produce braking action on a wheel.
BRAKE PAWL
(hand brake)
A small, specially shaped, steel piece, pivoted to
engage the teeth of a brake ratchet wheel to prevent turning backward, and thus
releasing the brakes.
BRAKE PEDAL RESERVE
Brake pedal reserve is the ratio of the length of
the depressed pedal position to the free pedal position, where the length is
measured from the brake pedal to the floorboard.
BRAKE PIPE
The air brake piping of a car or locomotive which
acts as a supply pipe for the reservoir.
When all brake pipes on the car are adjoined, the entire pipe line
comprises what is commonly called "train line".
BRAKE POWER ASSIST UNIT
The brake power assist unit in an hydraulic brake
system is that device which reduces the operator effort required to actuate the
system, and if inoperative does not prevent the operator from braking the
vehicle by a continued application of muscular force on the service brake
control.
BRAKE RATCHET (hand brake)
A wheel attached to the brake shaft, having teeth
which the pawl engages, thus preventing the wheel and shaft from turning
backward.
BRAKE RATING
Proving performance. In terms of horsepower, the
maximum power that the brakes will absorb or dissipate as heat in a specified
period of time.
BRAKE RELEASE TIME
Brake release time is the time-it takes the
pressure in the brake chamber of an air brake system to fall from 98 psi. to 5
psi. after release of the brake pedal.
(Current Federal Motor Vehicle Safety Standard definition).
BRAKE SHAFT
A shaft on which a chain is wound and by which the
power of a hand brake is applied to the wheels.
BRAKE SHOE
The non
rotating unit of the brake (to which the brake shoe is attached) that contacts
the rotating unit to supply braking force.
BRAKE STEP
A small shelf or ledge on the end of the a freight
car on which the brakeman stands when applying the hand brake. Sometimes called a brake foot board.
Switch on the brake pedal that disables cruise control when brakes are applied. ( Detroit )
BRAKE SYSTEM
A combination of one or more brakes and the means
of operation and control.
BRAKE SYSTEM APPLICATION & BRAKING TIME OR
DISTANCE (Stopping Time or Distance)
The time elapsed or the distance traveled between
the instant or point at which the braking system is actuated and the instant or
point at which the vehicle or combination comes to rest.
BRAKE SYSTEM APPLICATION TIME OR DISTANCE
The time elapsed or distance traveled between the
instant or point at which the driver starts to move the braking controls and
the instant or point of first retardation by the brakes.
BRAKE VALVE (air brake)
The valve by which the engineer operates the
brakes. The proper name is engineers
brake valve.
BRAKE WHEEL
An iron wheel attached to the upper end of the
brake shaft which is manually turned to apply the brakes.
BRAKE, EMERGENCY
Secondary chassis brakes independent in application
from service brake. Used for parking the vehicle and for controlling it when
the service brake is incapacitated.
BRAKE, ENGINE
Brake device using engine compression pressure as
retarding medium.
BRAKE, SERVICE
Primary brake system for stopping vehicle.
BRAKE-EXHAUST
Brake device using engine exhaust back pressure as
retarding medium.
BRAKING DISTANCE
The distance through which brakes are applied to
slow a vehicle; the shortest distance in which a vehicle can be stopped by
braking from a specified speed on a particular surface; the distance from
application of brakes to collision.
See total stopping distance.
BRAKING SKID MARK
See skid mark.
BRAKING TIME
The time required to traverse the braking distance.
BRAKING TORQUE
Negative wheel torque.
BRASS POUNDER
Telegraph operator, whose sending instruments are
made of brass.
BREAK BULK
To separate a composite load into individual
shipments and route them to different destinations
BREAK BULK POINT OR TERMINAL
A place where a composite load is separated into
individual shipments and routed to different destinations
BREAK THE UNIT
(Slang)
Uncouple the tractor from the trailer.
BREAKAWAY VALVE
The equipment added to a tractor or trailer brake
system which safeguards the air supply on leading units and automatically
applies the brakes on any trailer which accidentally become separated.
BRIDGE
The distance between one axle and another, or
between two sets of axles. Used in some
states to ascertain the permissible gross weight for the vehicle. Also called spread. See spread tandem.
BRIDGE FORMULA
A formula used to determine the maximum gross
weight permissible on any group of axles.
BRINELL HARDNESS
Brinell Hardness refers to a scale used to
designate the degree of hardness possessed by a substance. Brinell Hardness is measured by pressing a
ball into a metal by use of a calibrated machine and measuring the force which it takes to indent the material. The test itself is called a Brinell Hardness
Test and the machine used for the test is called a Brinell Hardness Tester.
BRINELL MARK
A "Brinell mark" is a mark or Souse in
metal which is made by another piece of metal or rd object. Such marks
are helpful in accident reconstructs (to diagnose ..e direction of forces and the cause of failures. The use of the terminology "Brinell
mark" comes about by analogy with the indentation made by the ball in a
Brinell Hardness test.
BRINELLING
Brinelling is a term which refers to indentations
in ú material caused by impact or contact with a hard object. The term arises from the so-called Brinell
Hardness Test. which uses a rounded device to deform the surface of a material
whose hardness is to be tested. However indentations from any object not necessarily
associated with the hardness testing
are often called "brinelling."
BRITTLE FRACTURE
Brittle fracture is the fracture of a part under
load with little or no yielding. It is
a term used in the diagnosis of metal failures in the course of accident
reconstruction.
BROAD GAGE (track)
When the distance between the heads of the rails is
greater than 4' 9". See narrow
gage, standard gage and gage of track.
BROWNLINE
A print that is brown in color and somewhat
transparent, thus allowing additional prints to be made from it. Also known as
"Van Dyke" (tradename) or Sepia.
BRUSHED FINISH
Fine, directional, disruption of a smooth surface.
Usually done on aluminum, stainless steel, chrome plate, but can be simulated
in plastic.
BRUSH-PILOT
A rough preliminary trace of test results (I.e.,
injury criteria).
B-TRAINS
A combination consisting of a tractor and two semi
trailers, the second trailer coupled to the first trailer by use of a fifth
wheel, which is mounted directly behind the cargo body on the lead
semi-trailer.
btu
British thermal unit.
BUCKET SEAT
Individual seat, often contoured so as to provide
lateral support.
BUCKLE
SWITCH
A switch located in the seat belt buckle which
sense the condition of the belts (fastened or unfastened).
BUCKLE (BUCKLING)
When used in an engineering sense a structure is laid to buckle when
compressive loads on it cause the structure to exhibit large deflections which
constitute the failure.
BUILDING OR BASE
Fixture used to locate underbody assembly side
frame, front end, rear end and roof assembly.
BULK FREIGHT
Freight not in packages or containers.
BULKHEAD
A metal or wooden device located on the back of the
tractor or on the front of the trailer to keep loads from sifting forward and
going through cab of tractor. Sometimes
called a header board.
BULKHEAD FLAT
A flat car with adjustable bulk heads at each end
of the car, used for plywood and wall board ect.
BULLSEYE
An indentation of the panel surface caused by poor
die surface fit.
BUMP
Displace a junior man (with less seniority) on an
existing position.
BUMP STOP
An elastic
member which increases the wheel rate toward the end of the compression travel.
The bump stop may also act to limit the compression travel.
BUMPER-IMPULSE DETECTOR
(BID) A crash detector mounted in the front bumper
which provides an early ACRS actual signal.
BUMPING POST
A brace post or block piece at the end of a stub
track to prevent rolling cars from going off the ends of the rails. See car stop.
BUNCHING
The accumulation and tender of cars for loading or
unloading in excess of orders or contrary to customary schedules.
"B" UNIT
A Diesel unit without a cab and without complete
operating controls. Usually equipped
with hostler controls for independent operating at terminals.
BUNK, LOG
Structural cross-members forming bed for logs on
logging truck.
BUREAU OF MOTOR CARRIER SAFETY (BMCS)
A part of the Federal Highway Administration, which
is one of several administrations within the US. Department of Transportation
that issues the Motor Carrier Safety Regulations (FMCSRs).
BURNISHING
Burnishing is the reconditioning of brake linings
by repeated stops under controlled conditions.
BUS
Any motor vehicle designed to carry more than ten
passengers and used for transporting persons, other than a taxi cab, designed
to transport persons for compensation.
BUSHING
A cylindrical metal sleeve inserted into a machine
part for reducing the effect of friction on moving parts or for decreasing the
diameter of a hole.
BUSTLEBACK
Conventional automobile configuration as
differentiated from a fast-back. Also termed notchback.
BUTTRESS
The area on a tire between the edge of the tread
and the sidewall.
References
Detroit Diesel
Caterpillar User's Manual