Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Textbook Question
Chapter 12, Problem 5MC
Multiple valve engines tend to be more efficient than two-valve-per-cylinder engines because they.
- allow for increased port areas
d. all of the above
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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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- How many degrees the crankshaft will rotate with both the intake and exhaust valves seated when the intake opens 20 deg. BTDC, the exhaust opens 55 deg. BBDC, intake closes 25 deg. ABDC, and exhaust closes 45 deg. ATDC. (TYPE NUMBERS ONLY, AND THE UNIT IS DEG. AND ANSWER IN WHOLE NUMBERS ONLY) * Your answer On a four-stroke cycle reciprocating engine, which strokes are both valves open? * Power Compression Intake Exhaust Ignition The primary concern in the firing order of the opposed engine is to keep the power impulses on adjacent cylinders as close as possible to obtain the most outstanding mechanical efficiency. TRUE OR FALSE? * Your answer A nine-cylinder engine with a bore of 5.5 inches and a stroke of 6 inches will have a total piston displacement of? (TYPE NUMBERS ONLY, AND THE UNIT IS CU. INCH AND ANSWER IN WHOLE NUMBERS ONLY) * Your answerarrow_forwardExplain the benefit of using 4 valves per cylinder (2 Intake and 2 exhaust) instead of 2 valves per cylinder (1 intake and 1 exhaust)arrow_forwardBriefly explain the determination of gas pressure excitations in a 4-stroke engine.arrow_forward
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