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CHAPTER 18 AUTO EXAM QUESTIONS AND
ANSWERS 100% PASS
What two materials can cylinder heads be made of ? - ✔✔Aluminum or cast iron
What are the two types of valve guides? - ✔✔Integral and replaceable inserts
If a car decelerating on a hill has exhaust smoke, what are two possible causes? - ✔✔Faulty intake valve
seal pulled oil into cylinder from low pressure of the intake stroke. Oil is not being diluted with fuel.
The ________ effect is the term for the reason that a vacuum can happen at the bottom of the exhaust
valve guide. - ✔✔Atomizer
What are three types of valve guide seals? - ✔✔umbrella, o-ring, positive
Up to what temperature is a low-quality valve guide seal good? A high-quality seal? - ✔✔(Lower 250°F)
(High 440°F)
What is the name of the process that hardens integral valve seats? - ✔✔Tempering or annealing
What can happen to a valve that has a margin that is too thin ? - ✔✔It can overheat and valve will get
burned
Why would a spring have inner and outer coils? - ✔✔two springs clockwise and counter clockwise help
prevent the spring to bend inward.
What is the name of the type of rocker arm stud that does not require a valve adjustment? - ✔✔Positive
stop used with hydraulic lifters
Created by Katelyn Whitman © 2025, All Rights Reserved.
CHAPTER 18 AUTO EXAM QUESTIONS AND
ANSWERS 100% PASS
What two materials can cylinder heads be made of ? - ✔✔Aluminum or cast iron
What are the two types of valve guides? - ✔✔Integral and replaceable inserts
If a car decelerating on a hill has exhaust smoke, what are two possible causes? - ✔✔Faulty intake valve
seal pulled oil into cylinder from low pressure of the intake stroke. Oil is not being diluted with fuel.
The ________ effect is the term for the reason that a vacuum can happen at the bottom of the exhaust
valve guide. - ✔✔Atomizer
What are three types of valve guide seals? - ✔✔umbrella, o-ring, positive
Up to what temperature is a low-quality valve guide seal good? A high-quality seal? - ✔✔(Lower 250°F)
(High 440°F)
What is the name of the process that hardens integral valve seats? - ✔✔Tempering or annealing
What can happen to a valve that has a margin that is too thin ? - ✔✔It can overheat and valve will get
burned
Why would a spring have inner and outer coils? - ✔✔two springs clockwise and counter clockwise help
prevent the spring to bend inward.
What is the name of the type of rocker arm stud that does not require a valve adjustment? - ✔✔Positive
stop used with hydraulic lifters
Created by Katelyn Whitman © 2025, All Rights Reserved.
