Manual Drive Train > Untitled Deck > Flashcards

Untitled Deck Flashcards

(59 cards)

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1
Q

Technician A says most vibration complaints are axial. Technician B says radial vibration is caused by imbalance. Who is right?

A

B only

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2
Q

Which statement about drive shaft vibration is false?

A

Vibration pulses occur at irregular intervals.

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3
Q

A common cause of harshness is a lack of ____ in a mounting part.

A

Flexibility

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4
Q

Electronic vibration testers have all of the following except:

A

Frequency-sensitive reeds

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5
Q

A rotor micrometer is used to check _____.

A

Rotor thickness

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6
Q

Vibrations are the root cause of all noise complaints (Tech A). Vibrations are the root cause of all harshness complaints (Tech B). Who is right?

A

A) A only.

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7
Q

Worn U-joints cause vibration when the vehicle is _____ between 30–40 mph.

A

Accelerating

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8
Q

Which tire defect is not always easily observable?

A

tire tread separation.

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9
Q

A miss on one engine cylinder will occur at an order of _____ the number of cylinders.

A

One-half

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10
Q

Some insulators can be replaced with updated types (Tech A). Moving parts can be bolted tightly to eliminate vibration (Tech B). Who is right?

A

A only

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11
Q
A
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12
Q

A CV axle is clicking and the boot is torn. Tech A: worn CV joint. Tech B: regreasing may fix it. Who is right?

A

A only

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13
Q

Which noise is NOT typical of a dry CV joint? (popping, clicking, snapping, rumbling)

A

Rumbling

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14
Q

CV axle vibrations can be caused by worn joints, a bent axle, or loose attaching bolts. Which of these does NOT cause vibration?

A

Loose boot clamps

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15
Q

Air escapes when squeezing a CV boot. Tech A: boot/clamp defective. Tech B: normal venting. Who is right?

A

A only

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16
Q

Removing a transaxle: Tech A says remove axles from transaxle first. Tech B says axles must be removed from wheel hubs first. Who is right?

A

A only

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17
Q

Installing a new CV boot: Tech A says some boots can be installed without removing the axle. Tech B says clamps can be removed with a screwdriver. Who is right?

A

(C) Both A and B.

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18
Q

Which statement about servicing pressed-in wheel bearings is FALSE?

A

(A) the CV axle shaft must be pressed from the wheel hub

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19
Q

Tech A says tripod joints are the most common universal joint on CV axles. Tech B says tripod joints are almost always inner joints. Who is right?

A

B only

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20
Q

When replacing a CV boot, what should be placed on the CV axle shaft first? (CV joint, large clamp, small clamp, grease)

A

(C) Small boot clamp

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21
Q

Which will NOT occur from an improperly installed CV boot? (rapid wear, noises, loss of lubricant, transaxle failure)

A

Transaxle failure

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22
Q

Tech A: Some vehicles need alignment after servicing wheel bearings. Tech B: Some stub shaft nuts use a cotter pin. Who is right?

A

Both A and B

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23
Q

In transaxle vehicles, engine power is transferred from the transaxle to the drive wheels by the _____ (CV axles, U-joints, intermediate shaft, transaxle differential).

A

CV axles

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24
Q

A difference in drive angles in an unequal-length drive axle system may cause _____ (splining, drive slip, torque steer, wheel hop).

25
The design of the cross-and-roller U-joint causes all of the following except: vibration, constant velocity, slower driven yoke, uneven power transfer.
Constant velocity
26
Modern transaxle drive axles commonly use tripod, Rzeppa, and ball-and-cage joints. Which joint is not commonly used?
Cross-and-roller U-joints
27
CV joint boots do all of the following except: keep lubricant in, protect CV joints, prevent vibration, keep contaminants out.
Prevent vibration
28
CV axles and CV joints transfer power from the transaxle to the _____. (engine, wheel hubs, wheel bearings, rear axle assembly)
Wheel hubs
29
Tech A says straightness and balance are critical on front CV axles due to large operating angles. Tech B says an out-of-balance front CV axle will cause vibration in the passenger compartment. Who is right?
Both A and B
30
For it to transfer power, the CV axle stub shaft must be supported by the _____ (spindle, central shaft, CV axle shaft, wheel bearings).
Wheel bearings
31
Which is NOT considered a true CV joint? (tripod, Cardan, Rzeppa, plunging)
Cardan joints
32
The inboard end of a CV axle connects to the _____ (wheel hub, rear bearing support, transaxle differential, stub axle).
Transaxle differential
33
Which statement about steering knuckles is NOT true? (keep grease circulating, pivot wheels, connect to suspension, mount hubs)
They keep grease circulating
34
CV axle shafts include each of the following except: stub shafts, spindles, center shafts, transfer shafts.
(D) transfer shafts.
35
On rear-wheel drive vehicles, the transmission and rear axle are connected by the _____
Drive shaft assembly
36
Which of the following is NOT part of the drive shaft assembly?
Drive pinion gear
37
The drive shaft assembly transfers power from the transmission to the _____
Rear axle assembly
38
Which component allows the drive shaft to change effective length at the rear of the transmission?
Slip yoke
39
Which U-joint type does NOT consist of a center spider with four cups containing needle bearings?
(D) double Cardan U-joints
40
Fluctuation in drive shaft speed is created at the _____
Front U-joint
41
Double Cardan U-joint equal-angle operation is achieved by which component(s)? Tech A: ball-and-socket centering device. Tech B: center yoke. Who is right?
A only
42
Which universal joint is NOT designed for constant velocity?
Cross-and-roller joint
43
In the rear axle assembly, the differential pinion yoke connects the _____
Drive pinion gear
44
The Hotchkiss drive can be described in all ways except: easier to service, uses an enclosed shaft, lighter, cheaper. Which is NOT true?
Uses an enclosed shaft
45
Since the drive shaft length in a torque-tube drive does not change, which part is NOT needed?
Slip yoke
46
A two-piece drive shaft uses _____
Three U-joints
47
Slip yoke: Tech A says it has external splines that mate with the transmission output shaft. Tech B says it fits closely with the extension bushing and rear seal. Who is right?
(B) B only
48
Tech A says all cross-and-roller U-joints have grease fittings. Tech B says some U-joints are sealed and cannot be greased. Who is right?
B only
49
Which is NOT used to hold bearing cups in place?
Anaerobic sealer
50
Which statement about drive shaft assembly problems is FALSE? (all problems caused by vibration, U-joints are common sources, bent wheel can be confused with drive shaft problem, misaligned parts can cause malfunctions)
All drive shaft assembly problems are caused by vibration
51
Tech A: worn U-joint can cause clunking when reversing. Tech B: loose U-joint can sometimes be repaired by greasing. Who is right?
A only
52
Most likely cause of a squeaking noise from the drive shaft assembly? (Bent shaft, dry U-joints, worn U-joints, worn slip yoke)
Dry U-joints
53
Tech A: dirt/undercoating won’t affect drive shaft smoothness. Tech B: slip yoke wears more than transmission extension bushing. Who is right?
(D) Neither A nor B.
54
Which is FALSE about checking drive shaft runout? (shaft should turn in perfect circle, shaft should be at sharp angle, most shafts never require runout check, eliminate other problems first)
The drive shaft should be at a sharp angle during runout checking
55
Tech A: drive shaft angles can change from spring wear/collision. Tech B: excessive angles can break U-joints. Who is right?
Both A and B
56
Original equipment U-joints do NOT normally have _____. (needle bearings, retainers, grease fittings, center cross)
Grease fittings
57
Tech A: clamp shaft in vise until it bends slightly to remove U-joint. Tech B: mark shafts before removing U-joint for reinstallation. Who is right?
B only
58
Which CANNOT be used as adapters to remove U-joint bearing cups? (large sockets, special removal sleeves, brass drifts, short pipe segments)
(C) brass drifts
59
Installing a new U-joint: bearing cup won’t press in enough for snap ring. Tech A: needle bearing fell to bottom. Tech B: snap ring too thick. Who is right?
Both A and B
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