Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Textbook Question
Chapter 12, Problem 3MC
To ensure proper seating of the valve, the valve seat must be.
- the correct width
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When fitting a freshly ground valve into a freshly ground seat: Technician A says that the seat should be ground more with the same stone if the margin is too small. Technician B says that the seat should be ground more with the same stone if the valve seat is too high. Who is correct?
An AND valve can allow flow alternatively from its inlets.
Select : true or False
What is the rotational travel through which both valves are closed? (in degrees)
Chapter 12 Solutions
Automotive Technology
Ch. 12 - Explain staged and continuously variable value...Ch. 12 - Prob. 2SACh. 12 - Define valve margin.Ch. 12 - What usually causes warpage in an aluminum cylin...Ch. 12 - What are the two ways pushrods can be checked for...Ch. 12 - True False? Fiats MultiAir system relies on...Ch. 12 - True False? Camshaft straightness is checked using...Ch. 12 - Which of the following is not true of knurling? It...Ch. 12 - To allow the engine to run on the Atkinson cycle,...Ch. 12 - To ensure proper seating of the valve, the valve...
Ch. 12 - Many engines with WT have a phaser mounted to the...Ch. 12 - Multiple valve engines tend to be more efficient...Ch. 12 - Which of the following is not a type of valve...Ch. 12 - What type of valve lifter automatically...Ch. 12 - Prob. 8MCCh. 12 - While discussing the reasons for resurfacing a...Ch. 12 - While inspecting the timing gears of an engine:...Ch. 12 - Technician A says that positive valve stem seals...Ch. 12 - Prob. 4ASRQCh. 12 - Technician A says an engine may use one or more...Ch. 12 - Technician A says it is not necessary to measure...Ch. 12 - While discussing the Valvetronic system:...Ch. 12 - While checking a hydraulic phaser after the...Ch. 12 - While servicing a pair of aluminum cylinder heads:...Ch. 12 - While discussing camshafts Technician A says valve...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Which of the following statements is not true? Normally the desired valve face-to-seat contact area for intake valves is 1 inch. Normally the desired valve face-to-seat contact area for exhaust valves is 1 inch. The average valve seat width is 0.060 inch and the average seat begins 0.030 inch from the valve margin. A properly reconditioned seat has the correct seat width and sealing position on the valve face.arrow_forwardWhich of the following is not a type of valve guide seal? Positive Negative Umbrella O-ringarrow_forwardWhich of the following is not true of knurling? It is one of the fastest techniques for restoring the ID dimensions of a worn valve guide. It reduces the amount of work necessary to reseat the valve. It is useful for restoring badly worn guides to their original condition. None of the above.arrow_forward
- Technician A says that positive valve stem seals fit tightly around the top of the valve guide. Technician B says that positive stem seals scrape oil off the valve as it moves up and down. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhat should you do if a valve does not move freely in its bore in the valve body?arrow_forwardValves are favored because of their lower cost and lighter weight Correct answer plug ball poppet butterflyarrow_forward
- Technician A says it is not necessary to measure valve stem height unless the valves have been replaced. Technician B says valve stem height can be adjusted with shims. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhat type of valve lifter automatically compensates for the effects of engine temperature? Hydraulic Solid Roller All of the abovearrow_forwardIdentify the D.C. valve employed to reverse the direction of flow and explain its working withneat diagramarrow_forward
- When is the valve tip ground? How do you know how much to remove from the tip?arrow_forwarda) What is valve overlap? b) Why is some amount of valve overlap desirable? c) Define the term zero overlap. note: do not Copy from Any othersite. And Please Provide handwritten Solution With diagram For better understanding. No need to explain Much ,Brief enough.arrow_forwardWhich of the following prevents rapid switching on and off control valves in pressure control systems? a. compare actual pressure to the upper and lower limits b. compare actual pressure to the desired pressure value c. compare actual pressure to the center of the dead band d. compare actual pressure to the maximum and minimum valve positions.arrow_forward
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