Power trains test ch. 51, 52, 53

Shock load failure on a gear will usually result in _____________. a broken gear tooth a driveline failure gear noise a star-type fracture Page: 1556

A driveline failure

Scuffing, deformation, or discoloration can be signs of excessive heat in the __________. gear set pinion bearing differential case axle Page: 1542

Axle

Tandem and tridem drive arrangements must allow for differences in _________ between the drive axles. axle positions rolling radius axle speeds inter-axle differential Page: 1521

Axle speeds

True ____ joints are joints that can operate at angles but do not create the speeding up and slowing down as with Cardan joints. constant velocity Hooke Rzeppa slip Page: 1487

Constant velocity

The speed at which the centrifugal force causes the shaft to move off its axis is known as __________. critical speed velocity torque jounce Page: 1473

Critical speed

In most drive axles, lubrication is effected by the movement of the ____________. wheel end crown wheel inner wheel wheel hub Page: 1526

Crown wheel

Which of the following is the maximum torque that the shaft can handle? Maximum torsional excitation Non-uniform velocity Maximum inertial excitation Driveshaft capacity Page: 1473

Driveshaft capacity

Glidecoat is a blue nylon coating designed to reduce __________ in the slip joint. the magnitude of the acceleration and decelerations vibration friction the driveshaft weight Page: 1476

Friction

What type of gear set is the most popular design in use today on heavy trucks? Amboid Hypoid Topoid Durapoid Page: 1576

Hypoid

What type of gearing was developed to increase the strength of a normal spiral bevel gear and to lower the center of gravity of the vehicle? Durapoid Amboid Hypoid Topoid Page: 1508

Hypoid

What does false brinelling lead to? Weld seam failures Driveshaft vibrations Extreme operating angles Joint failure Page: 1481

Joint failure

A low level of lubricant could be a sign of ____________. contaminated lubricant shock load failure leakage fatigue failure Page: 1535

Leakage

Any driveshaft must allow the shaft to change__________________. speed weight length direction Page: 1473

Length

All Cardan joints use what type of bearings to carry the torque load exerted on a driveshaft? Needle roller Hanger Support Center Page: 1480

Needle roller

All driveshafts have a natural tendency to vibrate because of a phenomenon called________. uniform velocity non-uniform velocity harmonic vibration critical speed vibration Page: 1479

Non-uniform velocity

Which of the following is the preferred method of cancellation, as the two joints will remain equal during suspension oscillation and shaft length changes? Coupling arrangement Parallel arrangement Broken back arrangement Intersecting angle arrangement Page: 1481

Parallel arrangement

______ of the universal joint operating angles means that the output yoke of the joint doing the cancellation of the non-uniform velocity has to be doing exactly the opposite of the driven yoke of the input universal joint. Cross-phasing Incremental phasing Phasing Cancelling Page: 1482

Phasing

Reassembling the drive axle components begins with installing the___________ bearings. side gear support hub roller differential side pinion Page: 1543

Pinion

What adjustment sets the running position of the pinion gear in relation to the crown gear and affects the gear set contact pattern? Pinion depth Side bearing preload Gear set backlash Pinion gear bearing preload Page: 1543

Pinion depth

The ____ has two components: the inter-axle differential and the main differential. drive axle housing differential carrier housing differential case power divider Page: 1552

Power divider

Negative endplay is known as _____________. overload backlash preload shock load Page: 1535

Preload

What type of housing is also known as a banjo housing because the shape of the housing resembles a banjo with two necks? Differential case Integral carrier Power divider Removable carrier Page: 1509

Removable carrier

Who was the first to document that the joint produced non-uniform velocity when operated at an angle? The ancient Greeks Robert Hooke Clarence Spicer Gerolamo Cardano Page: 1472

Robert hooke

Failure to match tire sizes can lead to failure of the inter-axle differential due to excessive_______. spinout torque speed rotation Page: 1523

Rotation

_____ ensures that the crown gear is held rigidly and that it will not move away from the pinion gear under load. Gear set backlash Pinion gear bearing preload Side bearing preload Pinion depth Page: 1543

Side bearing preload

The pinion pilot bearing is also known as the ___________bearing. profile spigot lengthwise adjuster Page: 1541

Spigot

The engine and __________ are rigidly bolted together and are always on the same plane when the vehicle moves along the road. center bearing frame suspension transmission Page: 1473

Transmission

What types of vibrations are caused by an out-of-balance driveshaft or system and occur once per shaft revolution? Critical speed Transverse Torsional Secondary couple Page: 1551

Transverse

Differential gears allow for the wheels to turn at ___________speeds. equal faster slower unequal Page: 1510

Unequal

What type of noise will be heard on acceleration or deceleration depending on where the pattern runs off the tooth? Whining Hissing Knocking Grinding Page: 1549

Whining