Exam1_ME444_Fall07

# Exam1_ME444_Fall07 - ME 444 Exam 1 September 13, 2007...

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ME 444 Exam 1 September 13, 2007 Closed Book Closed Notes Name:________________________ PID:__________________________

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Problem 1: Show a PV diagram for a naturally aspirated 4-stroke cycle engine. Label all important points including peak pressure, valve events, with reference to atmospheric pressure. Show the diagram for an idle and a full load condition. Full Load: Note : Area A >> Area B Idle: Note : Area A ≈ Area B P atm A B P peak
Problem 2: In less than 10 words for each describe the functions of these engine parts: Camshaft : Controls valve timing Intake / Exhaust Valves : Seal combustion chamber and control gas flow Crankshaft : Converts reciprocating motion of piston to rotary motion Timing chain / belt : Synchronizes motion of valves with the piston to complete cycle Piston rings : Seals the combustion chamber

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Problem 3: A test cell is 10 ft x 20 ft x 15 ft. We wish to operate this cell at 70 o F with a relative humidity of 60%. Assume that dry air is supplied to this cell and that water must be added to raise the
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## This note was uploaded on 01/29/2012 for the course ME 444 taught by Professor Staff during the Fall '08 term at Michigan State University.

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Exam1_ME444_Fall07 - ME 444 Exam 1 September 13, 2007...

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