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MOD 7, UNIT 1, QUIZ 2 ENGINE THEORY QUESTIONS WITH CORRECT ANSWERS

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MOD 7, UNIT 1, QUIZ 2 ENGINE THEORY

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MOD 7, UNIT 1, QUIZ 2 ENGINE THEORY

What is the indicated Horsepower of a 12 cylinder engine with a Bore of 5.5 inches, a
Stroke of 6 inches and producing an IMEP of 165 PSI at 3,000 RPM?
A. 1,361 HP
B. 12,829 HP
C. 1,069 HP - answerC. 1,069 HP

A nine (9) cylinder radial engine with a Bore of five and one-half (5.5) inches and a
Stroke of six (6) inches will have a Total Piston Displacement (CID) of:
A. 1.425 Cubic Inches
B. 1,283 Cubic Inches
C. 740 Cubic Inches - answerB. 1,283 Cubic Inches

The Volume of a Cylinder is 70 Cubic Inches when the piston is at BDC. When the
piston is at TDC, the Volume is 10 Cubic Inches. What is the Compression Ratio?
A. 7:1
B. 7:10
C. 10:7 - answerA. 7:1

After ignition occurs in a cylinder, the normal speed of the Flame Front across the
combustion chamber is approximately:
A. 400 FPS
B. 200 FPS
C. 100 FPS - answerC. 100 FPS

Engine speed:
A. Will always increase when ignition timing is advanced
B. Is expressed in Revolutions Per Minute
C. Will always decrease when ignition timing is retarded - answerB. Is expressed in
Revolutions Per Minute

The actual power delivered to the propeller of an aircraft reciprocating engine is called:
A. Indicated Horsepower
B. Friction Horsepower
C. Brake Horsepower - answerC. Brake Horsepower

What term best describes the explosion of the Fuel/Air Mixture in the Combustion
Chamber?
A. Detonation
B. Normal Ignition
C. Pre-ignition - answerA. Detonation

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