Deck 6: Engine Materials, Fasteners, Gaskets, and Seals

Question 1

Both ferrous and non-ferrous metals contain iron.

Answer 1

False

Question 2

Many new gasket failures are caused by which of the following?

A) Using sealants when not necessary
B) Overtorquing
C) Uneven tightening
D) All of the above

Answer 2

D

Question 3

Epoxy thread repair kits should not be used in which of the following conditions?

A) Cylinder heads
B) Internal engine parts
C) Intake manifolds
D) All of the above

Answer 3

D

Question 4

Which of the following is not typical for applying a RTV gasket maker?

A) Cleaning mating surfaces with mineral spirits
B) Apply a continuous bead 3mm in size
C) Wipe away excess sealant
D) Takes 24 hours to fully cure

Question 5

Chisels can be used on iron, steel, and aluminum stampings.

Question 6

Technician A says most sealants have a shelf life of about one year. Technician B says RTV sealants do not have a shelf life and can be used indefinitely after opening. Who is correct?

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

Question 7

Penetrants can be safely used on fasteners that are still warm from being heated

Question 8

Seals are used to prevent leakage between moving parts.

Question 9

Technician A says liquid thread locker can be used to prevent loosening due to vibration. Technician B says when liquid thread locker is used on fasteners, the fasteners must be installed right away before the thread locker dries. Who is correct?

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

Question 10

Which tool should not be used when trying to remove a fastener?

A) Box-end wrench
B) Socket
C) Open-end wrench
D) Penetrating oil

Question 11

The cylinder head bolts have been removed from an engine. The manufacturer of the engine requires replacement of these bolts for the installation procedure of the cylinder head. This is because:

A) They are torque-to-yield bolts.
B) The bolts are likely to be dirty and rusty.
C) The bolts have been updated.
D) The bolt grade will be reduced after regular service and use.

Question 12

Technician A says a special seal tool may be necessary to remove a one-piece seal. Technician B says all new seals should have a slight amount of oil applied to them to aid installation. Who is correct?

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

Question 13

Chamfering refers to removing the raised edge of a hole.

Question 14

All of the following may have to be removed to replace an oil pan gasket while the engine is in the car except?

A) Suspension parts
B) Exhaust pipes
C) Brake components
D) Frame or engine mounts

Question 15

Sealants are used to fill in slight gaps in mating surfaces.

Question 16

Most gaskets require the use of a sealant to be used in addition to the gasket.

Question 17

Only 50% of bolt torque is applied to clamping force, the other 50% is used to overcome surface friction.

Question 18

Gaskets are used to seal liquids and gases between moving parts.

Question 19

Anaerobic sealants do not require oxygen to cure.

Question 20

A ball peen hammer can be used to flatten the bolt holes on a steel oil pan.

Question 21

Technician A says adding cold water to an overheated engine can cause aluminum cylinder heads to crack. Technician B says casting defects can cause cracks to appear in engine components. Who is correct?

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

Question 22

Technician A says all metals have a grain structure that helps determine the metal's strength. Technician B only ferrous metals have a grain structure. Who is correct?

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

Question 23

Gaskets are used to prevent leaks between ____________________ components.

Question 24

Turbocharged engines may use forged parts for all of the following except:

A) Connecting rods
B) Pistons
C) Valves
D) Camshaft

Question 25

Which of the following can be applied to a stuck fastener that has been heated with a torch yet still will not move?

A) WD-40
B) Motor oil
C) Paraffin wax
D) ATF

Question 26

Thin components, such as oil pans, valve covers, and heat shields can be made of ____________________ sheets of ____________________ .

Question 27

Which of the following is not a metal treatment method?

A) Sintering
B) Annealing
C) Peening
D) Tempering

Question 28

Modern connecting rods may be constructed with all of the following materials except:

A) Steel
B) Iron
C) Plastic
D) Titanium

Question 29

Technician A says machined components are stronger than both cast and forged components. Technician B says machined components are less costly to manufacture than cast components. Who is correct?

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

Question 30

Magnafluxing can usually be used on all of the following components except:

A) Crankshafts
B) Pistons
C) Connecting rods
D) Engine blocks

Question 31

Most seal and gasket failures are due to ____________________ .

Question 32

____________________ sealants can cure without the presence of oxygen.

Question 33

____________________ is the number of thread per inch or millimeter.

Question 34

Aluminum is used in the construction of all of the following modern production engine components except:

A) Engine blocks
B) Connecting rods
C) Pistons
D) Intake manifolds

Question 35

Which of the following is not recommend when trying to loosen a stuck fastener?

A) Applying heat
B) Applying increased force until the fastener loosens
C) Striking with a punch and hammer
D) Trying to slight tighten

Question 36

Engine blocks are generally constructed of:

A) Low carbon steel
B) Medium carbon steel
C) High carbon steel
D) None of the above

Question 37

____________________ are mixtures of two or more metals.

Question 38

A ____________________ allows for major thread repairs while keeping the same size fastener.

Question 39

Technician A says gaskets are used to prevent fluid leaks around rotating parts. Technician B says gaskets are used to prevent leaks between stationary parts. Who is correct?

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

Question 40

____________________ contain iron and will attract a magnet.

Question 41

A die is a special tool that can be used to ____________________ threads or make new threads on a ____________________ .

Question 42

Why are torque-to-yield bolts be replaced after removed?

Question 43

What steps can be taken to remove a stuck fastener?

Question 44

What do the lines and/or numbers on a bolt head indicate?

Question 45

Explain why cylinder head gaskets have the most demanding requirements of any engine seal or gasket.

Question 46

The ____________ is the part of a head gasket that seals the combustion chamber.

Question 47

____________________ can be used to remove burrs from external threads.

Question 48

Explain the benefits to using plastic engine components.