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Apprentice Diesel Technician > Frame and Suspension Fundamentals > Flashcards

Frame and Suspension Fundamentals Flashcards

1
Q
  1. List three (3) functions of a vehicle frame.
    a)
    b)
    c)
A

a) provide a platform on which the major vehicle components are attached,
b) support the load that the vehicle is intended to carry, and
c) resist shock and torsional loads when the vehicle is in operation.

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2
Q
  1. The point at which the maximum force is concentrated on a frame is called the
A

The point at which the maximum force is concentrated on a frame is called the
maximum bending moment.

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3
Q
  1. A ladder type frame is made up of:
    a)
    b)
A

a) parallel frame rails

b) crossmembers

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4
Q
  1. The function of frame crossmembers is to
A

The function of frame crossmembers is to provide strength and rigidity to the frame
assembly.

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5
Q
  1. Which one of the following is not a common frame rail shape?
    a) trapezoid
    b) channel
    c) box
    d) I-beam
A

a) trapezoid

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6
Q
  1. The surface between the flanges of an I-beam frame rail is called the
A

The surface between the flanges of an I-beam frame rail is called the web.

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7
Q
  1. What is the function of a gusset that is attached to a frame crossmember?
A

gussets provide resistance to frame weaving

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8
Q
  1. The size and shape of frame components affect the strength of the frame.
    a) true
    b) false
A

a) true

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9
Q
  1. Define the term yield strength as it applies to the strength of frame materials.
A

Yield strength refers to the amount of stress that the material can withstand before
becoming permanently deformed.

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10
Q
  1. Which of the following frame materials would have the highest yield strength?
    a) mild steel
    b) high strength, low alloy steel
    c) heat-treated alloy steel
    d) copper-aluminum alloy
A

c) heat-treated alloy steel

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11
Q 
11. The term section modulus refers to the strength of frame components based on:
a)
b)
c)
d)
A

a) height.
b) width
c) thickness
d) shape

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12
Q
  1. A frame with a high resisting bending moment (RBM) has less strength than a frame
    with a low RBM.
    a) true
    b) false
A

b) false; The greater the REM, the greater the strength of the frame.

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13
Q 
13. List four ( 4) functions of a vehicle suspension system.
a)
b)
c)
d)
A

a) Secure the axles to the frame while maintaining proper alignment.
b) Support the weight of the vehicle and its cargo while maintaining lateral stability.
c) Cushion shock loads.
d) Allow axle movement so that the tires follow the contour of the road.

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14
Q
  1. The term unsprung weight refers to the weight of the vehicle and its load.
    a) true
    b) false
A

b) false; The combined weight of the components below the connection point is
called unsprung weight because it is located below the suspension
system.

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15
Q
  1. The suspension system must hold the axles in alignment with the frame. This means
    that the:
    a) wheels are held perpendicular to the frame rails.
    b) wheels are held parallel to the frame rails.
    c) distance between the frame and the suspension is held constant.
    d) steering angles are correct.
A

b) wheels are held parallel to the frame rails.

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16
Q 
16. Three of the most common types of energy-absorbing devices used in suspension
systems are:
a)
b)
c)
A

a) leaf spring
b) rubber cushion
c) rubber air spring

17
Q
  1. The energy-absorbing device of a suspension system is released when it rebounds.
    a) true
    b) false
A

a) true

18
Q
  1. Solid-mount suspension systems are best suited to applications that:
    a) have a low centre of gravity.
    b) require a soft ride.
    c) operate on rugged terrain.
    d) do not require good tire-to-road surface contact
A

c) operate on rugged terrain.

19
Q
  1. Equalizer beams reduce the effect of shock loads to the vehicle frame by:
    a) 20%.
    b) 30%.
    c) 40%.
    d) 50%.
A

d) 50%.

20
Q
  1. Axles are stabilized against braking and acceleration forces by
A

Axles are stabilized against braking and acceleration forces by longitudinal torque
rods.

21
Q
  1. The function of transverse torque rods is to
A

The function of transverse torque rods is to provide improved side-to-side stability by
distributing side loads more evenly across the entire length of the axle.

22
Q
  1. Progressive leaf springs provide a low spring rate when the vehicle is unloaded and a
    high spring rate under load.
    a) true
    b) false
A

a) true

23
Q
  1. Auxiliary springs help to support the vehicle when it is:
    a) unloaded.
    b) loaded.
    c) both loaded and unloaded.
    d) none of the above.
A

b) loaded.

24
Q
  1. Spring shackles accommodate changes in spring length as the suspension jounces and
    rebounds.
    a) true
    b) false
A

a) true

25
Q
  1. The main function of a shock absorber is to
A

dampen spring oscillation

26
Q
  1. The function of vertical drive pins on a rubber cushion type suspension is to
A

The function of vertical drive pins on a rubber cushion type suspension is to allow the
saddles to move up and down as the load cushions deflect, thus maintaining
alignment of the saddles with the frame rails.

27
Q
  1. An advantage that air spring suspensions have over other suspension types is that
    they provide superior:
    a) ride quality.
    b) lateral stability.
    c) off-road performance.
    d) support for high centre of gravity loads.
A

a) ride quality

28
Q
  1. State the function of the pressure protection valve in an air spring suspension.
A

ensures that a minimum safe pressure is maintained in the air reservoir for air brake
operation if a leak occurs in the suspension air system

29
Q
  1. The ride height control valve supplies air to the air springs when:
    a) load is removed from the vehicle.
    b) the suspension is in rebound.
    c) additional load is added to the vehicle.
    d) the air brakes are applied.
A

c) additional load is added to the vehicle.

30
Q
  1. The function of the two-way control valve and dump valves is to
A

The function of the two-way control valve and dump valves is to allow the driver to
exhaust the air springs so that the suspension will lower when connecting or
disconnecting a trailer.

Apprentice Diesel Technician (73 decks)

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