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Technician Orientation > Technician Orientation > Flashcards

Technician Orientation Flashcards

1
Q

Measurement from the centerline of the rear axle to the end of the frame.

A

AF

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2
Q

combines a traditional clutch- actuated manual transmission with an electronically controlled shift actuator and clutch, Includes the DT 12 transmission

A

Automated Manual Transmission

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3
Q

transmission where the gear shifts operate hydraulically. It uses a torque converter rather than a clutch. The torque converter is a fluid coupling used to transfer power from the engine to the transmission

A

Automatic Transmission

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4
Q

compensate for the fact that the wheel on the outside of a turn must travel a greater distance and therefore, faster than the wheel on the inside of the turn

A

Axle Differential

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5
Q

measurement from the front bumper to the axle centerline

A

BA

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6
Q

measurement from the front bumper to the back of the cab.

A

BBC

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7
Q

use gussets at the top and bottom to attach it to the frame web. These crossmembers are commonly used at a suspension centerline and behind the suspension

A

C Channel Crossmembers

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8
Q

measurement from the back of the cab to rear axle centerline

A

CA

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9
Q

has the cab set above the engine, with the driver at the very front of the vehicle. The COE has a shorter overall length than the conventional for greater maneuverability. The COE also has more space behind the cab allowing for larger payloads

A

Cab-Over Engine (COE)

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10
Q

the inside area of the frame rail

A

Channel

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11
Q

the frame of the vehicle

A

Chassis

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12
Q

located between the engine and the transmission, it connect and disconnects the engine and the transmission allowing a smooth start up and gear changes, The amount of torque that must be transmitted determines the size of the clutch required

A

Clutch

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13
Q

has the engine located under the hood ahead of the cab. It has more room and easier access to the engine and other front end components

A

Conventional Cab

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14
Q

the beams that connect the left and the right frame rails to control their movement and reduce torsional stress. The types commonly used in DTNA vehicles include alligator and c channel crossmembers

A

Crossmembers

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15
Q

for traction, when this is engaged, power is delivered to both of the axle’s wheel ends to ensure that traction is available and to protect against spin-out

A

Differential Lock

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16
Q

refers to the power generation and transfer components of the truck. Transmits horsepower and torque from the engine to the drive wheels. Includes the engine, clutch, transmission, driveline, drive axles and wheels

A

DriveTrain

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17
Q

an option offered on most engines, is often referred to as a “ jake brake”. Is used in conjunction with downshifting to appropriate lower gears slows the vehicle reducing the use of service brakes

A

Engine Braking Systems

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18
Q

frame height

A

FH

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19
Q

used to connect a tractor to the trailer. Is a round metal plate mounter on the rear frame rails, which holds the kingpin, allowing the trailer to be puller and to pivot easily

A

Fifth Wheel

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20
Q

the weight an axle system can support

A

Gross Axle Weight Rating (GAWR)

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21
Q

the total allowable weight of the chassis, body and the payload.

A

Gross Vehicle Weight Rating ( GVWR) -

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22
Q

metal plates used to attach crossmembers to the frame to add strength. This helps reduce the stress on mounting bolts and stiffens the frame for durability

A

Gusset

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23
Q

with tandem axles, it takes power from the engine and delivers it to both the forward and the rearward driving axles, while allowing for speed differences between the axles

A

Inter- Axle Differential

24
Q

the front mounting or supporting point of the trailer that locks into the tractors fifth wheel

A

Kingpin

25
Q

increases weight capacity or to distribute the weight over more wheels when needed. It is lowered and raised by an air spring system. The driver controls the operation of the air springs through a rocker switch on the dash. Large load bearing air springs control the suspension riding height when the axle is lowered to the ground

A

Lift Axle

26
Q

transmission where the gear is selected by the driver and each speed provides either an increase of torque or speed available to the wheels

A

Manual Transmission

27
Q

Includes pull type clutches such as the Eaton EAsy Pedal and Stamped Angle Spring

A

Manually Adjusted Clutch

28
Q

provides information about the configuration of the vehicle. This is not the same as the VIN’

A

Model Number

29
Q

The cab is mounted onto the frame at points with the least vibration to reduce cab movement and frame caused stress

A

Nodal Point

30
Q

designed to support a portion of the vehicle weight but doesnt transmit a driving force to its wheels. Most front aisles installed on trucks are non powered.

A

Non Powered ( Dead ) Axle

31
Q

overall length

A

OAL

32
Q

the total weight of the commodity being carried ( bulk, containers, perishable, equipment, tanker )

A

Payload

33
Q

coupling a the rear of the truck or trailer used for towing another trailer

A

PIntle Hook

34
Q

provides the means for connecting optional equipment to the engine, such as a cement mixer or a fire engine water pump, in order to supply the equipment with engine power

A

Power Take Off (PTO)

35
Q

designed to support a portion of the vehicle weight and to transmit a driving force to its wheels

A

Powered (Live) Axle

36
Q

may be hydraulically actuated or actuated by a mechanical linkage. The pedal pulls the release bearing to disengage the clutch

A

Pull Type Clutch

37
Q

hydraulically actuated clutches. the release bearing is pushed into the clutch

A

Push Type Clutch

38
Q

dead axle located in front of a driver axle

A

Pusher Axle

39
Q

classified as either powered ( live) or non powered ( dead)

A

Rear Axle

40
Q

includes pull type clutches such as the Eaton Solo

A

Self Adjusting Clutch

41
Q

the last 6 characters of a vehicles Vehicle Identification Number (VIN)

A

Serial Number

42
Q

this is the old standard position. The centerline is approximately 30” behind the leading surface of the bumper

A

Set Forward Front Axle Position

43
Q

provides directional control of the vehicle. May be powered or non- powered

A

Steering Axle ( Front Axle)

44
Q

Dead Axle located behind the drive axle

A

Tag Axle

45
Q

two or more axles attached one behind the other. Usually refers to a rear axle combination but it can also be a front axle tandem or dual steer. When two live axles are in tandem, its known as a dual drive tandem

A

Tandem Axle

46
Q

a long beam with a bull ring at the front that is held by the truck’s pintle hook and used to pull a trailer or other units

A

Tongue

47
Q

a vehicle that pulls something like a trailer. Commonly referred to as a semi or a semi truck,

A

Tractor or Truck Tractor

48
Q

a platform ( flatbed) or a container on wheels pulled by a tractor. A semi trailer is supported by its own suspension at the rear and by the tractor’s fifth wheel at the front. A full trailer is completely supported on its own suspension and wheels

A

Trailer

49
Q

transmits engine power to the driveline, it increases or decreases the speed to meet the operating conditions of the vehicle. There are three basic types : manual, automatic and auto manual

A

Transmission

50
Q
  • a vehicle that carries its load in or on a body that is permanently attached to the frame rails. Is frequently used to actually mean a tractor. A tractor is commonly referred to as a semi or a semi truck
A

Truck

51
Q

has two select gear ratios, a high range single reduction gear set to increase speed and a low range double reduction gear set to increase torque. The operator selects the desired axle range by moving the range selection lever or switch located on the shifter knob

A

Two Speed Axle

52
Q

Federal Motor Vehicle Safety Standard 115 specifies that all vehicles sold in the US be assigned a 17 character number The last 6 characters comprise the vehicles serial number

A

Vehicle Identification Number (VIN)

53
Q

also referred to as the component information label. It can usually be found inside the rear cover of the warranty booklet and attached to the inside of the glove box

A

Vehicle Specification Decal

54
Q

measure by the distance between the centerline of the front axle and the centerline of the rear axle, or the centerline between tandem axles ( if equipped ). Is an important measurement for determining the amount of weight each axle will carry

A

WB

55
Q

the surface area between the flanges on a frame rail

A

Web

Technician Orientation (1 decks)

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