Bakers Powerplant Questions and Answers 100% Correct(RATED A+)

How are conventional reciprocating engines classified? - ANSWER-According to cylinder arrangements to the crankshaft or according to the method of cooling. What are the different types of piston rings? - ANSWER-Compression, Oil control and scraper rings. What are the main causes of a cylinder having low compression? - ANSWER-Broken piston rings, rings that are not seating properly, burnt valves and poorly seated valves. What is the purpose of the oil control rings? - ANSWER-They are used to control the thickness of the oil film on the cylinder walls. What may be the result of installing piston rings incorrectly? - ANSWER-Excessive oil consumption. What type of piston rods are commonly found in radial engines? - ANSWER-A master and articulating rod assembly What type of bearings are generally used in reciprocating engines? - ANSWER-Plain, roller, ball bearing What is the indication of valve blowby? - ANSWER-hissing or a whistle when pulling the propeller through by hand What is the purpose of using more than one spring for valve closing? - ANSWER-Valve springs resonate at certain engine speeds, two springs help eliminate valve float What is the purpose of valve overlap? - ANSWER-It allows better volumetric efficiency and lowers cylinder operating temperatures Describe the inspection you would give the valve springs during engine overhaul. - ANSWER-Clean them and visually inspect them for overheat damage and cracking What is the purpose of using valves with sodium filled stems? - ANSWER-Sodium is an excellent heat conductor and aids in dissipating heat to the cooling fins What causes engine sudden stoppage? - ANSWER-Striking an object or engine seizure What type inspection must be made after sudden stoppage of an engine? - ANSWER-Complete engine tear down and inspection What is the purpose of the crankshaft dynamic dampers used in aircraft engines? - ANSWER-To overcome forces causing crankshaft deflection and torsional vibration How would you make a runout check on a crankshaft that is still installed on the engine? - ANSWER-Remove the propeller and attach a dial indicator guage What is detonation? - ANSWER-Explosive ignition of the fuel/air mixture within the cylinder combustion chamber What cylinder is engine to magneto timing based on? - ANSWER-The number one cylinder What is engine sudden speed reduction? - ANSWER-When the propeller strikes an object but continues to run Wha