Deck 36: Gaskets and Sealants

Question 1

What force causes a head gasket to be drawn downward during engine operation?

A)Exhaust gas pressure
B)Intake stroke vacuum
C)Gravity
D)Head bolt torque

Answer 1

Intake stroke vacuum

Question 2

Where is a multilayered steel (MLS) gasket most often used in an engine?

A)Intake manifold gasket
B)Oil pan gasket
C)Head gasket
D)Valve cover gasket

Answer 2

Head gasket

Question 3

A steel or copper wire used in a head gasket around the cylinder is called ________.

A)Fire ring
B)Armor
C)Ridge block
D)Either A or B

Answer 3

Either A or B

Question 4

A one piece oil pan gasket often uses ________ in the middle to add strength.

A)Hard rubber
B)Steel
C)Plastic (nylon)
D)Carbon fiber

Question 5

Some gaskets use a steel washer around each bolt hole. The purpose of this washer is to ________.

A)Help seal around the bolt hole
B)Prevent the gasket from being compressed too much
C)Improve the strength of the gasket
D)Help prevent the gasket from shrinking

Question 6

A gasket failure caused by the movement of dissimilar materials is called ________.

A)Fretting
B)Corrosion
C)Tearing
D)Collapsing

Question 7

Which type of oil seal must NOT have oil applied to it for it to work correctly?

A)Viton
B)Buna-N
C)Teflon
D)Silicon rubber

Question 8

Which type of sealer is to be used on non-machined surfaces?

A)RTV
B)anaerobic sealer
C)Either A or B
D)Neither A nor B

Question 9

Which product requires heat to remove?

A)Red thread locker
B)Antiseize
C)Blue thread locker
D)RTV

Question 10

What precautions should be followed when using gaskets?

A)A gasket should be checked to be sure that it is the correct gasket
B)Never reuse an old gasket
C)Read the instruction sheet
D)All of the above

Question 11

Technician A says that gaskets are used to fill a space or gap between two objects to prevent leakage from occurring. Technician B says that there are many types of gaskets including cylinder head gaskets, valve cover gaskets, and timing cover gaskets. Who is right?

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

Question 12

RTV (room temperature vulcanized) cures under which of these conditions?

A)Moisture in the air
B)At room temperature
C)Without oxygen
D)Both A and B

Question 13

Which of these head gaskets is most commonly used on engine equipped with an aluminum cylinder head on a cast iron block?

A)Solid steel core
B)Perforated steel core
C)Multilayered steel (MLS)
D)Either A or B

Question 14

What could occur if thread sealant was not installed on the threads of a head bolt being installed in a wet hole in the cylinder block?

A)Coolant would leak from around the head bolt
B)Cylinder block could be cracked
C)Head bolt would apply too much clamping force
D)Threads would not be lubricated

Question 15

Which of these is the head gasket?

A)A
B)B
C)C
D)D

Question 16

Use of the wrong type of RTV silicone sealer could damage the ________.

A)Water pump gasket
B)Water pump
C)Crankshaft sensor
D)Oxygen sensor

Question 17

Old style cork cover gaskets have been replaced by ________.

A)Synthetic rubber gaskets
B)Rubber coated metal gaskets
C)Cork-rubber gaskets
D)All of these

Question 18

Most late model vehicles will use ________ as an intake manifold gasket.

A)Plastic/rubber
B)RTV
C)Cork-rubber
D)Cork

Question 19

The pressure in a gasoline engine combustion chamber can be as high as ________.

A)400°
B)1000 PSI
C)Both A and B
D)Neither A nor B

Question 20

What is the purpose of the wire ring in this picture?

A)To seal the combustion chamber
B)Not enough information
C)To insulate the spark plug
D)To seal the coolant passages