Cylinder Head Components CDX

Question 1

Technician A says multiple springs per valve may be used in engines designed to run at high rpm. Technician B says that the more pressure the valve springs have, the less wear will occur on the other valve train components. Who is correct?

Answer 1

Technician A

Question 2

The engine installed in a race car would have _______ intake and exhaust ports than an engine designed for low operating speeds.

Answer 2

larger

Question 3

Hardened valve seats are often used for both intake and exhaust ports to accommodate:

Answer 3

extreme temperatures.

Question 4

When discussing valve train components, Technician A says stamped rocker arms are very strong and may be used in high-horsepower engines. Technician B says forged rocker arms are used in high-torque, high-horsepower applications. Who is correct?

Answer 4

Technician B

Question 5

The main benefit of using roller rocker arms in the valve train is:

Answer 5

reduced friction and wear.

Question 6

What is flame propagation?

Answer 6

The movement of the flame front away from the spark plug across the combustion chamber

Question 7

When discussing intake and exhaust port designs, Technician A says larger ports will increase an engine’s torque at low engine speeds. Technician B says larger ports will increase torque at high engine speeds. Who is correct?

Answer 7

Technician B

Question 8

During a cylinder leakage test, air leaks into the cooling system (out of the radiator filler neck). What should the next step be?

Answer 8

Remove the head and inspect it and the head gasket for leaks.

Question 9

Technician A says all parts removed from a cylinder head should be placed on a disassembly board or laid out carefully so the location they were removed from can be identified. Technician B says it is important to reassemble parts in their original locations so wear patterns will match. Who is correct?

Answer 9

Both Technician A and Technician B

Question 10

When removing a cylinder head, the first step is to:

Answer 10

research the removal procedure.

Question 11

To determine if valve springs can be reused, they should be tested for spring height, installed pressure, and:

Answer 11

squareness.

Question 12

Technician A says using roller rocker arms will reduce wear and friction in the valve train. Technician B says using roller rocker arms will increase fuel economy and performance. Who is correct?

Answer 12

Both Technician A and Technician B

Question 13

What is the purpose of multivalve, hemispherical chamber cylinder heads (3 or 4 valves per cylinder)?

Answer 13

To increase the engine’s power and efficiency

Question 14

Technician A says that valve stem seals allow a small amount of oil to seep past them in order to lubricate the valve stems. Technician B says that no oil should seep past properly functioning valve stem seals. Who is correct?

Answer 14

Technician A

Question 15

Which of the following problems can be caused by worn valve guides?

Answer 15

All of the answers listed

Question 16

What is flame propagation?

Answer 16

The movement of the flame front away from the spark plug across the combustion chamber

Question 17

The engine installed in a race car would have _______ intake and exhaust ports than an engine designed for low operating speeds.

Answer 17

larger

Question 18

The wedge combustion chamber:

lowers hydrocarbon emissions.

has the spark plug placed at the thick end of the wedge.

has a small combustion chamber surface area.

Answer 18

All of the answers listed

Question 19

Two technicians are discussing a cracked cast iron head. Technician A says that some cracks can be welded successfully. Technician B says that some cracks can be repaired by pinning them. Who is correct?

Answer 19

Both Technician A and Technician B

Question 20

Which of the following should you be aware of when removing a cylinder head?

Answer 20

Some manufacturers require the head bolts to be loosened in a specified pattern.

Question 21

During a cylinder leakage test, air leaks into the cooling system (out of the radiator filler neck). What should the next step be?

Answer 21

Remove the head and inspect it and the head gasket for leaks.

Question 22

When removing a cylinder head, the first step is to:

Answer 22

research the removal procedure.

Question 23

To begin cylinder head component reassembly, Technician A says valve stems should be coated with clean engine oil or engine assembly lubricant before installing the valves. Technician B says only the valve stem seals need to be lubricated for reassembly. Who is correct?

Answer 23

Technician A

Question 24

Technician A says all parts removed from a cylinder head should be placed on a disassembly board or laid out carefully so the location they were removed from can be identified. Technician B says it is important to reassemble parts in their original locations so wear patterns will match. Who is correct?

Answer 24

Both Technician A and Technician B

Question 25

To determine if valve springs can be reused, they should be tested for spring height, installed pressure, and:

Answer 25

squareness.

Question 26

Technician A says generally, sodium-filled valves cannot be repaired or ground and must be replaced if problems occur. Technician B says sodium filled valves have a hollow stem where the sodium is located. Who is correct?

Answer 26

Both Technician A and Technician B

Question 27

Which of the following problems can be caused by worn valve guides?

Excessive engine oil consumption

Exhaust smoke

Premature wear on the valve face, seat, and stem

Answer 27

All of the answers listed

Question 28

What is the purpose of multivalve, hemispherical chamber cylinder heads (3 or 4 valves per cylinder)?

Answer 28

To increase the engine’s power and efficiency

Question 29

The main benefit of using roller rocker arms in the valve train is:

Answer 29

reduced friction and wear.

Question 30

Which of the following tools should be used to measure valve clearance (lash) with solid valve lifters?

Answer 30

Feeler gauge

Question 31

In an L-head (flat head) engine design, where are the valves located?

Answer 31

In the block, off to one side of the cylinder

Question 32

Hardened valve seats are often used for both intake and exhaust ports to accommodate:

Answer 32

extreme temperatures.

Question 33

The maximum allowed warpage of the cylinder head gasket surface is typically:

Answer 33

0.003″ (0.0762 mm).

Question 34

Technician A says a cylinder head made of aluminum alloy cannot be checked for cracks with the Magna-Flux process. Technician B says the aluminum head can be dye tested for cracks and pressure checked for leaks. Who is correct?

Answer 34

Both Technician A and Technician B

Question 35

Technician A says pushrods can best be checked for straightness by rolling them across a very flat surface such as a piece of glass. Technician B says rocker arms must be checked for wear at their valve end, pushrod end, and pivot area. Who is correct?

Answer 35

Both Technician A and Technician B

Question 36

When deciding whether to reuse valve springs, Technician A says a valve spring is sure to have correct pressure if it passes the height and squareness tests. Technician B says a valve spring that is not square can cause premature wear to the guide and stem. Who is correct?

Answer 36

Technician B