Deck 4: Fasteners and Thread Repair

Question 1

Tech A says that some locking nuts have a nylon insert that has a smaller diameter hole than the threads in the nut. Tech B says that castle nuts are used with cotter pins to prevent the nut from loosening. Who is correct?

A) Tech A
B) Tech A
C) Both A and B
D) Neither A nor B

Answer 1

C

Question 2

The aim of thread repair is to restore the thread to a condition that restores the fastening integrity.

Answer 2

True

Question 3

Once the broken bolt is removed, run a lubricated tap or thread restoring tool of the correct size and thread pitch through the hole, to clean up any rust or damage.

Answer 3

True

Question 4

To properly accomplish their given job, fasteners come in a variety of diameters for different sized loads, and hardnesses, which are defined in grades.

Question 5

The thread of a bolt acts as an inclined plane; as the bolt is turned, it is drawn into or out of the matching thread.

Question 6

Technician A says that a benefit of helical gears is that they do not create radial or thrust loads. Technician B says that spur gears run quieter than helical gears. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 7

In a manual transmission, the gears and shafts are supported on bearings or bearing surfaces to:

A) decrease fuel consumption.
B) decrease rolling friction.
C) decrease the size.
D) decrease the volume of coolant necessary.

Question 8

In an automotive manual transmission/transaxle, _______ are often of a selective thickness to allow for end play adjustments.

A) Needle roller bearings
B) Pocket bearings
C) Thrust washers
D) Roller bearings

Question 9

A _______in a groove on the outside of the manual transmission bearing can locate each bearing and shaft in the casing, which maintains the alignment of the gears and engagement hubs.

A) Roller bearing
B) Snap ring
C) Circlip
D) Both B and C

Question 10

Single-row, deep-groove ball bearings normally support the ______ in conventional rear-wheel drive manual transmissions.

A) Input shaft and reversing shaft
B) Main shaft and input shaft
C) Either A or B
D) Neither A nor B

Question 11

________ are normally used in pairs in manual transmissions and can sustain heavy radial and thrust loads in either direction.

A) Selective thickness shims
B) Pocket bearings
C) Tapered roller bearings
D) Needle roller bearings

Question 12

________ can be of the caged type, or they can be a loose number assembled to operate directly on a hardened gear or shaft.

A) Thrust washers
B) Needle roller bearings
C) Thrust bearings
D) Selective thickness shims

Question 13

Which types of bearings are typically used to support purely radial loads?

A) Thrust bearings
B) Ball bearings
C) Sleeve bearings
D) Roller bearings

Question 14

What type of bearing is best used to sustain radial and thrust loads?

A) Cylindrical roller bearing
B) Tapered roller bearing
C) Needle roller bearing
D) Pin roller bearing

Question 15

Technician A says that a manual transmission's bearings are submerged in gear fluid. Technician B says that oil seals prevent the entrance of dirt and moisture into the transmission. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 16

Choose the correct statement:

A) Always reuse gaskets and seals.
B) Sealants should not be used in transmissions.
C) Gasket surfaces don't need to be cleaned because the new gasket will seal any residual gasket material.
D) Check the main case and output shaft housing with a straightedge and feeler gauge.

Question 17

The purpose of axle seals is to ___________.

A) Contain the lubricating fluid in the final drive assembly
B) Maintain quiet operation
C) Seal contaminants out of the sealed cavity
D) All of the above

Question 18

Seals can develop leaks, which can cause bearings to ______.

A) Become dry
B) Overheat from a lack of lubrication
C) Become damaged
D) All of the above

Question 19

A/an __________ provides a tight seal against a rotating surface so that lubricants cannot leak out and dirt and contaminants cannot get in.

A) grease seal
B) dust cap
C) garter seal
D) O-ring seal

Question 20

Which of the following statements about RTV is NOT true?

A) The correct type of RTV must be chosen for the given application.
B) The RTV must withstand the fluids and temperatures for the component it is used on.
C) Using too much RTV is always a safe repair practice.
D) Different RTVs can have different thickness and flexibility when cured.

Question 21

__________ should always be used on threaded pipes, plugs, or bolts.

A) RTV
B) Gasket material
C) Anti-seize
D) Thread sealer

Question 22

Seals for a manual transmission are being discussed. Technician A says that many seals consist of a stamped metal case with a flexible sealing lip and an internal spring. Technician B says that a seal referred to as a Scotseal does not have a single sealing lip, but rather multiple sealing lips on the outside of the seal. Who is correct?

A) Technician A
B) Technician B
C) Both technicians A and B
D) Neither technician A nor B

Question 23

__________ is a type of sealant used on threads that may not be perfectly shaped.

A) Teflon tape or paste
B) Loctite
C) Anti-seize
D) RTV

Question 24

When rebuilding a manual transmission, it's always a good practice to replace the:

A) sliding gears.
B) gaskets and seals.
C) shift forks.
D) bearings.

Question 25

What is the first step in replacing a seal or gasket?

A) Cover the new gasket with RTV.
B) Clean the new gasket with solvent.
C) Clean off the old gasket from sealing surfaces.
D) Scratch up soft metal surfaces for proper sealing.

Question 26

Technician A says that abrasive discs cannot cause any damage to the engine or components. Technician B says that when using abrasive discs, some of the material may damage engine components, such as bearings, and should never be used. Who is correct?

A) Technician A
B) Technician B
C) Both technicians A and B
D) Neither technician A nor B

Question 27

Which of the following is NOT a proper way to remove old gaskets and sealants from soft metals such as aluminum?

A) Metal scraper
B) Chemical gasket remover
C) Bristle disc of the correct color
D) Plastic scraper

Question 28

Technician A says that an abrasive disc can safely be used on any surface when removing an old gasket. Technician B says that plastic scrapers can be safely used on all types of metals without any surface damage. Who is correct?

A) Technician A
B) Technician B
C) Both technicians A and B
D) Neither technician A nor B

Question 29

Technician A says that chemical gasket removers must be used in conjunction with another mechanical gasket removal tool. Technician B says that abrasive discs can cause some engine bearing damage and should not be used. Who is correct?

A) Technician A
B) Technician B
C) Both technicians A and B
D) Neither technician A nor B

Question 30

Technician A says that a gasket can only seal imperfections that fall in the gasket's parameters. Technician B says that gaskets are used to seal surfaces with excessive warpage. Who is correct?

A) Technician A
B) Technician B
C) Both technicians A and B
D) Neither technician A nor B

Question 31

Technician A says that a stamped steel surface should always be checked for warpage. Technician B says that all bolts should be completely started by hand before anything is torqued. Who is correct?

A) Technician A
B) Technician B
C) Both technicians A and B
D) Neither technician A nor B

Question 32

Technician A says that too much RTV sealant is never a concern, and a generous amount should always be applied. Technician B says that the RTV instructions for waiting time should always be followed before returning the part back into service. Who is correct?

A) Technician A
B) Technician B
C) Both technicians A and B
D) Neither technician A nor B

Question 33

If a vehicle uses serviceable bearings, the maximum allowable play is approximately ________.

A) 0.010"
B) 0.020"
C) 0.030"
D) 0.040"

Question 34

Technician A says that a replaceable sealed wheel bearing replacement normally requires the removal of the steering knuckle and use of a hydraulic press. Technician B says that a special tool will allow a replaceable bearing to be replaced on the vehicle without removal of the steering knuckle. Who is correct?

A) Technician A
B) Technician B
C) Both Technicians A and B
D) Neither Technician A nor B

Question 35

Which type of sealed wheel bearing requires the use of a hydraulic press or special tool to remove and install it on the vehicle?

A) Unitized
B) Non-unitized
C) Tapered roller bearing
D) None of the choices listed

Question 36

Technician A says that a replaceable wheel bearing can be serviced on the vehicle with a special tool that does not require steering knuckle removal. Technician B says that a replaceable wheel bearing replacement requires the steering knuckle to be removed and a hydraulic press be used. Who is correct?

A) Technician A
B) Technician B
C) Both technicians A and B
D) Neither technician A nor B

Question 37

Technician A says that when pressing a wheel bearing into the steering knuckle, be sure to press on the outer bearing, otherwise the bearing will be damaged. Technician B says that when pressing the axle flange in, the inner bearing must be supported, otherwise the bearing will be damaged. Who is correct?

A) Technician A
B) Technician B
C) Both technicians A and B
D) Neither technician A nor B