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1. A device that is used on suspensions to primarily absorb energy
and dampen suspension oscillation is called:
A. An equalizer bracket.
B. A torque rod.
C. A spring.
D. A shock absorber.
Answer A is incorrect. An equalizer bracket is used to mount and
house the equalizer.
Answer B is incorrect. The torque arm is used to control axle
rotational forces and to maintain and adjust axle alignment.
Answer C is incorrect. The spring assemblies distribute the vehicle
load across the frame and provide a cushion between the road
surface and the vehicle.
Answer D is correct. Shock absorbers dampen spring oscillation by
limiting the effects of spring jounce and rebound
2. Upon inspection, excessive play in the steering column assembly
on a truck equipped with a tilt steering column is noted. Which of the
following would be the LEAST LIKELY cause?
A. Loose lock shoe in the support
B. Faulty anti-lash spring in the centering sphere
C. Loose tilt head pivot pins
D. Column mounting bracket bolts loose
,Answer A is incorrect. Tilt mechanisms are designed to allow for the
column to be adjusted and then held securely in that position by the
lock shoe mechanism. If the lock shoe pin and wedge lock
components are worn, excessive movement in the steering column
would be the result.
Answer B is correct. A faulty anti-lash spring might cause the
housing to be loose, but it would not cause excessive play in the
steering column assembly.
Answer C is incorrect. The main housing pivots on the pivot screws
located on each side of the main housing support bracket. If the pins
become worn, the steering column would have excessive movement
because the pivot pins are not holding the column securely in place.
Answer D is incorrect. The column mounting bolt bracket secures
the column. If the bracket bolts become loose, the column would
shift and have movement in the steering column assembly.
4. While discussing steering system components, Technician A
states that a typical single-axle truck system has one Ackerman arm.
Technician B says that the Ackerman arm controls turning radius.
Who is correct?
A only
B only
Both A and B
Neither A nor B
Answer A is incorrect. There are two Ackerman arms in the steering
system.
Answer B is correct. Only Technician B is correct. Ackerman arms
control the turning radius and allow for each front wheel to rotate on
different arcs while turning.
Answer C is incorrect. Only Technician B is correct.
Answer D is incorrect. Technician B is correct.
5. A driver complains that after hitting a bump his vehicle suddenly
veers to the right or left. Which of these is the LEAST LIKELY cause?
A. A loose idler arm
,B. A damaged relay rod
C. A worn tie rod end
D. A wheel out of balance
Answer A is incorrect. A loose idler arm will cause fluctuation in the
steering when striking a bump.
Answer B is incorrect. A damaged relay rod can cause veering when
striking a bump because of looseness in the ball joint end of the relay
rod.
Answer C is incorrect. A worn tie rod end can cause veering when
striking a bump because of looseness in the ball joint end of the tie
rod.
Answer D is correct. Wheel balance will not cause veering, only a
shaking in the steering wheel.
6. The alignment angle that is LEAST LIKBLY to cause the greatest
tire wear is.
A. Castor.
B. Turning radius.
C. Toe-in.
D. Camber.
Answer A is correct. Castor is a non tire wearing angle. Excessive
Castor will be present with steerability complaints and wheel shimmy
at low speeds.
Answer B is incorrect. Turning radius usually does not cause tire
wear unless the Ackerman arms are damaged or the wrong
Ackerman arm is installed.
Answer C is incorrect. Toe in causes the greatest tire wear.
Improper toe adjustment causes rapid tire wear, which may result in
tire failure, collision damage, and personal injury. Excessive toe Out
causes wear on the inside of the tire tread ribs and a sharp feathered
edge on the outside of the tread ribs. If excessive toe-in is present,
the tire tread wear is reverses
Answer D is incorrect. Camber can cause tire wear but not as great
a tire wearing angle as toein
, Technician A states that in order for a steerable suspension to steer
or track correctly, it is necessary for the front wheels to be in a toe-
out condition. Technician B says that the toe setting should be
between 1/16 inch and 1/8 inch. Who is correct?
A only
B only
Both A and B
Neither A nor B
Answer A is incorrect. The front wheels need to be in a toe-in
condition.
Answer B is correct. Only Technician B is correct. The toe setting
should be between 1/16 inch and 1/8 inch.
Answer C is incorrect. Only Technician B is correct.
Answer D is incorrect. Technician B is correct.
Alignment procedures are being discussed. Technician A says that
installing the caster shim between the axle and spring with the thick
part to the rear will make the caster angle positive Technician B says
installing the caster shim between the axle and spring with the low
side at the front will make the caster angle more negative. Who is
correct?
A only
B only
Both A and B
Neither A nor B
Answer A is correct. Only Technician A is correct. You make caster
more positive by installing a shim between the axle and spring with
the high side at the rear.
Answer B is incorrect. You make the caster more negative by
installing a shim between the axle and spring with the low side at the
rear.
Answer C is incorrect. Only Technician A is correct.
Answer D is incorrect. Technician A is correct.