Reciprocating Engines

In what position should the crankshaft be when a magneto is being timed to the engine?

• The piston in cylinder no. 2 should be in the correct position for ignition to occur. This is normally about 25° before top center on the compression stroke.

• The piston in cylinder no. 1 should be in the correct position for ignition to occur. This is normally about 30° before top center on the compression stroke.

• The piston in cylinder no. 2 should be in the correct position for ignition to occur. This is normally about 15° before top center on the compression stroke.

What is checked on engine runup to determine the operational condition of the engine?

• Idling RPM and manifold pressure, engine acceleration, maximum static RPM and manifold pressure, magneto drop, ignition switch safety check, propeller pitch change, propeller feathering, oil pressure, fuel pressure, & fuel flow.

• ignition switch safety check, propeller pitch change, propeller feathering, oil pressure, fuel pressure, & fuel flow.

• Idling RPM and manifold pressure, engine acceleration, maximum static RPM and manifold pressure, magneto drop.

How is a hydraulic lock removed from an aircraft engine?

• Remove all the spark plugs from each cylinder and drain all of the oil out. Clean all the spark plugs and replace them.

• Remove a spark plug from the locked cylinder and drain all of the oil out. Clean the spark plug and replace it.

• Both answers are correct.

What must be inspected to determine the airworthiness of an engine installation?

• The propeller, lubrication system, and ignition system.

• The propeller, lubrication system, ignition system, and fuel metering system.

• The propeller, lubrication system, ignition system, fuel metering system, cooling system, and the exhaust system.

What checks should be made to determine the proper operation of a reciprocating engine installation?

• Idle RPM and mixture, static RPM, propeller pitch change operation,and magneto check.

• Idle RPM and mixture, static RPM, propeller pitch change operation, magneto check, and ignition switch safety check.

• Idle RPM and mixture, static RPM, propeller pitch change operation, magneto check, ignition switch safety check, and carburetor heat check.

Where do you find instructions for removing an engine from an aircraft?

• In the aircraft maintenance manual.

• In the aircraft service manual.

• In the aircraft overhaul manual.

What are the basic steps in troubleshooting an engine installation?

• Know how the system should operate and observe how the system is operating.

• Divide the system to find the trouble and look for the obvious problems first.

• Know how the system should operate, observe how the system is operating, divide the system to find the trouble, and look for the obvious problems first.

Where do you find the procedures to follow when correcting a defective condition in an aircraft engine?

• In the engine maintenance manual.

• In the engine overhaul manual.

• In the engine service manual.

What is the purpose of a cold cylinder check?

• A cold cylinder check determines which cylinder is not firing.

• A cold cylinder check determines which cylinder is firing.

• Both are correct choices.

How can you determine the firing order of an 18-cylinder radial engine?

• Begin with cylinder 1, add 11, and subtract 7, whichever will keep the numbers between 1 and 18.

• Begin with cylinder 1, add 12, and subtract 5, whichever will keep the numbers between 1 and 18.

• Both choices are correct.