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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-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-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-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-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-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 reverses