Module 16 B1 - MODULE 16 PISTON ENGINE-1 Which statement is true regarding bearings used in high-powered reciprocating aircraft engines a The outer race

Module 16 B1 - MODULE 16 PISTON ENGINE-1 Which statement is...

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MODULE 16 PISTON ENGINE ------------------------------------------------------------------------------------------------------------------- 1 - Which statement is true regarding bearings used in high-powered reciprocating aircraft engines? a) The outer race of a single-row, self-aligning ball bearing will always have a radius equal to the radius of the balls. # b) There is less rolling friction when ball bearings are used than when roller bearings are employed. b) Crankshaft bearings are generally of the ball-type due to their ability to withstand extreme loads without overheating. 2 - As the pressure is applied during a reciprocating engine compression check using a differential pressure tester, what would a movement of the propeller in the direction of engine rotation indicate? # 3 - Which of the following would most likely cause a reciprocating engine to backfire through the induction system at low RPM operation? # 4 - What is the basic operational sequence for reducing the power output of an engine equipped with a constant-speed propeller? # 5 - Some cylinder barrels are hardened by: # a) Nitriding . b) shot peening. c) tempering. 6 - Cam-ground pistons are installed in some aircraft engines to: # 7 - Which statement pertaining to fuel/air ratios is true? #
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8 - Using the following information, determine how many degrees the crankshaft will rotate with both the intake and exhaust valves seated. Intake opens 15°: BTDC. Exhaust opens 70°: BBDC. Intake closes 45°: ABDC. Exhaust closes 10°: ATDC. # 9 - Which of the following will be caused by excessive valve clearance of a cylinder on a reciprocating aircraft engine? # a) Reduced valve overlap period. b) Intake and exhaust valves will open early and close late. c) A power increase by shortening the exhaust event. 10 - Which of these conditions will cause an engine to have an increased tendency to detonate? 1. High manifold pressure. 2. High intake air temperature. 3. Engine overheated. 4. Late ignition timing. # 11 - On which part of the cylinder walls of a normally operating engine will the greatest amount of wear occur?
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  • Summer '17
  • sajad heidari
  • Internal combustion engine, pistons, Connecting rod, Engine technology

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