310T Practical Skills and Training 4

Question 1

During a front-end alignment on a truck, caster angle is found to be unequal side-to-side. The MOST common adjustable correction method involves:

Accepted Answer

Adding or removing shims at the axle seat or adjusting eccentric bolts

Answer

Changing tie rod length

Answer

Bending the steering knuckle

Answer

Adjusting the drag link length

Question 2

A coach equipped with an air-ride rear suspension shows one side riding lower than the other with the leveling valve functioning normally. The MOST likely cause is:

Accepted Answer

A failed or leaking air spring on the low side

Answer

Incorrect tire pressure on the low side

Answer

A seized shock absorber on the high side

Answer

Incorrect frame height sensor calibration

Question 3

When measuring kingpin inclination (KPI) and camber together, the sum of these angles is used to determine:

Accepted Answer

Included angle

Answer

Scrub radius

Answer

Setback

Answer

Toe-out on turns

Question 4

A technician is checking driveshaft phasing on a truck. Correct phasing means:

Accepted Answer

The yokes at both ends of the shaft are aligned in the same plane

Answer

All U-joints are lubricated with the same grease type

Answer

The driveshaft runout is within 0.010 inch TIR

Answer

The slip yoke is fully engaged at ride height

Question 5

When performing a steer axle wheel bearing adjustment on a truck using the standard procedure, after hand-tight the bearing nut is torqued to seat the bearings, then backed off and:

Accepted Answer

Finger-tightened and locked with a cotter pin or lock ring

Answer

Torqued to final spec with no additional steps

Answer

Torqued to 50 ft-lb and locked with a jam nut

Answer

Backed off 1/2 turn and adjusted to zero end play with a dial indicator

Question 6

A technician suspects a leaking axle shaft seal on a drive axle. Before removing the axle shaft, the FIRST step is to:

Accepted Answer

Mark the axle shaft flange position relative to the hub

Answer

Drain the axle housing completely

Answer

Remove the wheel and tire assembly

Answer

Loosen the differential carrier bolts

Question 7

During a transmission fluid analysis on an Allison automatic, the fluid appears dark brown with a burnt smell but no metal particles. This MOST likely indicates:

Accepted Answer

Clutch pack slippage and heat degradation

Answer

Normal fluid aging that requires only a filter change

Answer

Converter lockup clutch failure

Answer

Pump wear generating metallic debris