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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
Q

what could be the result of the steering gear mounting bolts come loose

A

hard steering - erratic steering - binding steering

26
Q

what might cause a steering column to bind

A

universal joints out of phase - lack of lubrication - damaged slip joint

27
Q

what would cause both the outer and inner edges on a tire to wear

A

under inflation

28
Q

what would be used to make accurate measurements on steering components

A

dial indicator

29
Q

what is the most common damage found on universal joints

A

false brinelling

30
Q

when the steering column has been disconnected from the steering gear what precaution should be taken

A

disable the steering wheel to protect the clock spring

31
Q

how can you check a tie rod end for wear

A

by moving it back and forth and up and down with aprox 100 lbs of hand pressure

32
Q

if you find that one of the ball sockets on a drag link is worn out what should you do

A

change the drag link assembly

33
Q

what is an advantage of using a belt driven power steering pump

A

the belt can slip if the pump fails

34
Q

can all types of pumps be used on power steering systems on heavy duty trucks ?

A

yes

35
Q

what controls toe out on turns

A

lower steering arms

36
Q

how do you make a toe adjustment on a truck without a rack and pinion style steering gear

A

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
Q

what would happen if you increased the length of the tie rod

A

you would increase the toe in

38
Q

what is the objective of the toe in setting on a truck

A

to take up steering wear and achieve a zero toe at highway speeds fully loaded

39
Q

what is the most common toe setting

A

toe in

40
Q

when checking the wheel alignment what is the FIRST step that should be preformed

A

normalize the suspension

41
Q

when standing at the front of the truck and both tires are leaning outward slightly what angle would this be

A

positive camber

42
Q

if you had hard steering only when the truck was towing a loaded trailer what would be the first check to make

A

to see if the fifth wheel was lubricated

43
Q

what wear pattern would you see with excessive toe in on your tires

A

a feathered edge that is smooth going in a rough going out

44
Q

when the wheels are turned to a full lock position on a truck with 3 degrees of positive caster what should be observed

A

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
Q

what would happen if the thrust line was not perpendicular to the truck center line

A

dog tracking - suspension damage - tire damage

46
Q

if a truck had excessive positive camber on the right and negative camber on the left what would happen when driving the truck

A

it would want to pull to the right

47
Q

what could cause shimmy - heavy steering - increased road shock

A

excessive positive castor

48
Q

when would poppets have to be reset

A

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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