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4th year HET > Test questions > Flashcards

Test questions Flashcards

1
Q

what component connects the pitman arm to the upper steering arm

A

drag link

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2
Q

what device allows the steering knuckle to pivot

A

the king pin

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3
Q

what is used to retain a straight king pin

A

draw keys

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4
Q

how many lower steering arms are found on a typical single axle steering system

A

two

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5
Q

what device is used to synchronize movement from the left steering knuckle to the right steering knuckle

A

tie rod

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6
Q

can a kingpin be straight or tapered

A

yes

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7
Q

what type of manual steering gear is used on heavy-duty trucks

A

recirculating ball type

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8
Q

what component would be considered the driven member in a truck manual steering gear assembly

A

the sector shaft

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9
Q

how is the pitman arm connected to the sector shaft

A

splines and pinch bolt

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10
Q

can you center the steering wheel by disconnecting the one piece drag link and reconnecting it after the steering wheel has been adjusted

A

no

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11
Q

what must all power steering systems do if they loose power steering

A

revert back to manual steer

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12
Q

what is the path of power starting from the steering column

A

steering gear - pitman arm - drag link - upper steering arm - steering knuckle - lower steering arm tie rod - lower steering arm - steering knuckle

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13
Q

if the retaining nut came loose on the pitman arm/ drag link what could be the result

A

the mounting hole in the pitman arm could become damaged and have to be replaced

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14
Q

what would operating a power steering system with low oil cause

A

noisy pump

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15
Q

what is the proper repair procedure when dealing with damaged steering components

A

they should not be repaired . they should be discarded after removal .and replaced new

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16
Q

what could cause damage to the steering column

A

operators using the steering wheel as a grab handle when entering the cab

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17
Q

the power steering system on a heavy duty truck consists of what

A

reservoir - pump - steering gear

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18
Q

what controls the maximum steering angle on turns for each of the wheel ends on a steering axle

A

steering stops

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19
Q

on a rack and pinion what component is no longer required

A

pitman arms - upper steering arm

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20
Q

if the wheel base of a truck has been altered what component may have to be CHANGED

A

lower steering arms

21
Q

on a recirculating ball steering gear assembly the ball nut travel will cause the sector shaft to rotate about how far

A

30 degrees

22
Q

if the pressure relief valve on a power steering system was set to low

A

a loss of power steering assist will occur

23
Q

when the steering tires are in the straight ahead position where should the spokes of the steering wheel be

A

between 8 and 4 . + or - 10 degrees

24
Q

how is the steering knuckle vertical clearance adjusted

A

by adding shims or subtracting shims

25
what could be the result of the steering gear mounting bolts come loose
hard steering - erratic steering - binding steering
26
what might cause a steering column to bind
universal joints out of phase - lack of lubrication - damaged slip joint
27
what would cause both the outer and inner edges on a tire to wear
under inflation
28
what would be used to make accurate measurements on steering components
dial indicator
29
what is the most common damage found on universal joints
false brinelling
30
when the steering column has been disconnected from the steering gear what precaution should be taken
disable the steering wheel to protect the clock spring
31
how can you check a tie rod end for wear
by moving it back and forth and up and down with aprox 100 lbs of hand pressure
32
if you find that one of the ball sockets on a drag link is worn out what should you do
change the drag link assembly
33
what is an advantage of using a belt driven power steering pump
the belt can slip if the pump fails
34
can all types of pumps be used on power steering systems on heavy duty trucks ?
yes
35
what controls toe out on turns
lower steering arms
36
how do you make a toe adjustment on a truck without a rack and pinion style steering gear
by loosening both of the tie rod end clamps and turning the tie rod tube one way or the other to make your adjustment
37
what would happen if you increased the length of the tie rod
you would increase the toe in
38
what is the objective of the toe in setting on a truck
to take up steering wear and achieve a zero toe at highway speeds fully loaded
39
what is the most common toe setting
toe in
40
when checking the wheel alignment what is the FIRST step that should be preformed
normalize the suspension
41
when standing at the front of the truck and both tires are leaning outward slightly what angle would this be
positive camber
42
if you had hard steering only when the truck was towing a loaded trailer what would be the first check to make
to see if the fifth wheel was lubricated
43
what wear pattern would you see with excessive toe in on your tires
a feathered edge that is smooth going in a rough going out
44
when the wheels are turned to a full lock position on a truck with 3 degrees of positive caster what should be observed
the front bumper on one side should rise slightly and the other side should lower - steering wheel should attempt to return to the straight ahead position
45
what would happen if the thrust line was not perpendicular to the truck center line
dog tracking - suspension damage - tire damage
46
if a truck had excessive positive camber on the right and negative camber on the left what would happen when driving the truck
it would want to pull to the right
47
what could cause shimmy - heavy steering - increased road shock
excessive positive castor
48
when would poppets have to be reset
wheel cut has been reduced - steering stop bolts have been replaced - larger tires have been installed

4th year HET (31 decks)

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