FAA Exams > Powerplant

1	If the oil pressure of a cold engine is higher than at normal operating temperatures, the oil dilution system should be turned on immediately. oil system relief valve should be readjusted. engine's lubrication system is probably operating normally.
2	An engine misses in both the right and left positions of the magneto switch. The quickest method for locating the trouble is to check for one or more cold cylinders. perform a compression check. check each spark plug.
3	Engine crankshaft runout is usually checked 1. during engine overhaul. 2. during annual inspection. 3. after a 'prop strike' or sudden engine stoppage. 4. during 100-hour inspection. 1, 3, and 4. 1, 2 and 3. 1 and 3.
4	If an engine cylinder is to be removed, at what position in the cylinder should the piston be? Bottom dead center. Halfway between top and bottom dead center. Top dead center.
5	The horsepower developed in the cylinders of a reciprocating engine is known as the brake horsepower. shaft horsepower. indicated horsepower.
6	What does valve overlap promote? Better scavenging and cooling characteristics. Lower intake manifold pressure and temperatures. A backflow of gases across the cylinder.
7	Which fuel/air mixture will result in the highest engine temperature (all other factors remaining constant)? A mixture leaner than a manual lean mixture of .060. A mixture leaner than a rich best power mixture of .085. A mixture richer than a full rich mixture of .087.
8	When does valve overlap occur in the operation of an aircraft reciprocating engine? At the end of the exhaust stroke and the beginning of the intake stroke. At the end of the power stroke and the beginning of the exhaust stroke. At the end of the compression stroke and the beginning of the power stroke.
9	What is the best indication of worn valve guides? Low compression. High oil consumption. Low oil pressure.
10	If the ignition switch is moved from BOTH to either LEFT or RIGHT during an engine ground check, normal operation is usually indicated by a momentary interruption of both ignition systems. slight drop in RPM. large drop in RPM.