Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Chapter 12, Problem 5ASRQ
Technician A says an engine may use one or more valve springs per valve. Technician B says additional valve springs are used to control vibration and increase total pressure. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B
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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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- Which of the following are not typically found in the block of a modern engine? a. Pistons b. Crankshaft c. Valves d. Oil pumparrow_forwardExplain why a height-sensing proportioning valve is required on some vehicles.arrow_forwardTrue or False? No-start, surging, or stalling can be caused by an EGR valve that does not open.arrow_forward
- An EGR valve that does not fully close can cause all of the following except ____ . a. a no-start b. stalling c. surging d. detonationarrow_forwardTrue or False? Valve lash is adjusted in many different ways; however, on many OHC engines, the clearance is set by replacing a shim.arrow_forwardWhen discussing the diagnosis of a positive back pressure EGR valve: Technician A says that with the engine running at idle speed, if a hand pump is used to supply vacuum to the EGR valve, the valve should open at 12 in. Hg of vacuum. Technician B says that with the engine not running, any vacuum supplied to the EGR valve should be bled off and the valves diaphragm should not move. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forward
- 37- Technician A says that all transmission opening pressure are derived from the regulated output flow of the oil pump. Technician B says that every automatic transmission uses one, or more, pressure regulator valves. Who is correct? A- Technician A B- Technician B C- Both A and B D- Neither A nor Barrow_forwardWhich of the following is similar to a PCV valve but is specific to diesel engines? PCM EGR AIR CDRarrow_forwardA valve may be operated by any of the following except? a. none of the choices b. electronically c. mechanically d. manuallyarrow_forward
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