a) Adjust valves when the engine is hot. b) Adjust all exhaust valves before intake valves. # c) Eliminate cam bearing clearance when making valve adjustment. 68 - When is the fuel/air mixture ignited in a conventional reciprocating engine? # 69 - The valve clearance of an engine using hydraulic lifters, when the lifters are completely flat, or empty, should not exceed: # 70 - An increase in manifold pressure with a constant RPM will cause the bearing load in an engine to: # 71 - What is the purpose of a power check on a reciprocating engine? a) To check magneto drop. # b) To determine satisfactory performance. b) To determine if the fuel/air mixture is adequate.
72 - (1) Preignition is caused by improper ignition timing. (2) Detonation occurs when an area of the combustion chamber becomes incandescent and ignites the fuel/air mixture in advance of normal timed ignition. Regarding the above statements, # 73 - The floating control thermostat, used on some reciprocating engine installations, helps regulate oil temperature by: # 74 - What is the basic operational sequence for reducing the power output of an engine equipped with a constant-speed propeller? # 75 - If the hot clearance is used to set the valves when the engine is cold, what will occur during operation of the engine? a) The valves will open early and close early. # b) The valves will open late and close early. c) The valves will open early and close late. 76 - During ground check an engine is found to be rough-running, the magneto drop is normal, and the manifold pressure is higher than normal for any given RPM. The trouble may be caused by: # 77 - What tool is generally used to measure the crankshaft rotation in degrees? 78 - One of the best indicators of reciprocating engine combustion chamber problems is: #
79 - What is an advantage of using metallic-sodium filled exhaust valves in aircraft reciprocating engines?
- Summer '17
- sajad heidari
- Internal combustion engine, pistons, Connecting rod, Engine technology