Question 1

Technician A says VVT [variable valve timing] engines use a cam phaser that advances or retards the camshaft as the engine is running. Technician B says VVT engines use a third cam lobe with increased lift and duration, operating a third rocker arm that is coupled to the two primary rocker arms by a hydraulically controlled pin, while the engine is running. Who is correct?

Accepted Answer

A)   A only
B)   B only
C)   both A and B
D)   neither A nor B C

Question 2

A single hole in the cylinder head that divides into two branches is called a _____ port.

Accepted Answer

A)   dual
B)   siamese
C)   combination
D)   two-stage B

Question 3

Installed valve spring height can be adjusted with ____________________.

Accepted Answer

shims

Question 4

Hemispherical combustion chambers are being discussed. Technician A says the flame path from the spark plug to the piston head is short, which provides efficient burning. Technician B says cross-flow arrangement of the inlet and exhaust valves allows for a relatively free flow of gases in and out of the chamber. Who is correct?

Accepted Answer

A)   A only
B)   B only
C)   both A and B
D)   neither A nor B

Question 5

To ensure proper seating of the valve, the valve seat must _____.

Accepted Answer

A)   be the correct width
B)   have the correct location on the valve face
C)   be concentric with the guide
D)   all answers are correct

Question 6

The distance between the valve face and the head of the valve is called the ____________________.

Accepted Answer

The answer of The distance between the valve face and...

Question 7

Which of the following is NOT true of knurling?

Accepted Answer

A)   It is one of the fastest techniques for restoring the inside diameter (I
D)   dimension of a worn valve guide
B)   It reduces the amount of work necessary to reseat the valve
C)   It is useful for restoring badly worn guides to their original condition
D)   None of these answers is correct

Question 8

____________________ support the valve in the head and prevent the valve from moving in any direction other than up and down.

Accepted Answer

The answer of ____________________ support the valve in the head...

Question 9

Technician A uses a 30-degree stone for topping a 45-degree valve seat. Technician B uses a 60-degree stone to lower a 45-degree valve seat. Who is correct?

Accepted Answer

A)   A only
B)   B only
C)   both A and B
D)   neither A nor B

Question 10

A cylinder head that has the intake manifold and all the intake valves on one side and the exhaust manifold and exhaust valves on the opposite side is called a ____________________type cylinder head.

Accepted Answer

The answer of A cylinder head that has the intake...

Question 11

The hemispherical combustion chamber provides excellent turbulence to the air and fuel mixture.

Accepted Answer

A) True 
 B)False

Question 12

What is typically the maximum amount of warpage that is acceptable on a cast-iron cylinder head?

Accepted Answer

A)   0.002 in. (.05 mm) 
B)   0.003 in. (.076 mm) 
C)   0.004 in. (.102 mm) 
D)   0.005 in. (.127 mm)

Question 13

To protect against scuffing and wear, some valves have coatings of black nitride applied to the valve stem.

Accepted Answer

A) True 
 B)False

Question 14

Technician A resurfaces valve seats using a grinding stone. Technician B resurfaces valve seats using a cutting blade. Who is correct?

Accepted Answer

A)   A only
B)   B only
C)   both A and B
D)   neither A nor B

Question 15

Valve springs should be checked for all of the following EXCEPT:

Accepted Answer

A)   freestanding height
B)   squareness
C)   compressed height
D)   open pressure

Question 16

Technician A says the end of the valve spring that is wound the tightest should face toward the spring retainer. Technician B says the O-ring seal should be installed in the lowest of the keeper grooves on the valve stem.

Accepted Answer

A)   A only
B)   B only
C)   both A and B
D)   neither A nor B

Question 17

_____type valve stem seals move up and down with the valve stems to deflect oil away from the guides.

Accepted Answer

A)   Positive
B)   Umbrella
C)   O-ring
D)   Lip

Question 18

Installed spring height [the distance between the spring seat and the bottom of the retainer] can be measured with a spring height gauge or ____________________.

Accepted Answer

The answer of Installed spring height [the distance between the...

Question 19

Cylinder head warpage can be measured with _____.

Accepted Answer

A)   a straightedge and feeler gauge
B)   a dial indicator
C)   a surface gauge
D)   a ball gauge and outside micrometer

Question 20

Stainless steel is nonmagnetic.

Accepted Answer

A) True 
 B)False

Exam 12: Upper End Theory and Service

A single hole in the cylinder head that divides into two branches is called a _____ port.

Installed valve spring height can be adjusted with ____________________.

To ensure proper seating of the valve, the valve seat must _____.

The distance between the valve face and the head of the valve is called the ____________________.

Which of the following is NOT true of knurling?

____________________ support the valve in the head and prevent the valve from moving in any direction other than up and down.

Technician A uses a 30-degree stone for topping a 45-degree valve seat. Technician B uses a 60-degree stone to lower a 45-degree valve seat. Who is correct?

A cylinder head that has the intake manifold and all the intake valves on one side and the exhaust manifold and exhaust valves on the opposite side is called a ____________________type cylinder head.

The hemispherical combustion chamber provides excellent turbulence to the air and fuel mixture.

What is typically the maximum amount of warpage that is acceptable on a cast-iron cylinder head?

To protect against scuffing and wear, some valves have coatings of black nitride applied to the valve stem.

Technician A resurfaces valve seats using a grinding stone. Technician B resurfaces valve seats using a cutting blade. Who is correct?

Valve springs should be checked for all of the following EXCEPT:

Technician A says the end of the valve spring that is wound the tightest should face toward the spring retainer. Technician B says the O-ring seal should be installed in the lowest of the keeper grooves on the valve stem.

_____type valve stem seals move up and down with the valve stems to deflect oil away from the guides.

Installed spring height [the distance between the spring seat and the bottom of the retainer] can be measured with a spring height gauge or ____________________.

Cylinder head warpage can be measured with _____.

Stainless steel is nonmagnetic.