Term
| What indications are given in the event of a leaking or open primer while the engine is running? |
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Definition
| The engine will not idle properly |
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Term
| A cold cylinder is found when troubleshooting a running engine. What does this indicate? |
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Definition
| No combustion in that cylinder |
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Term
| When pulling a propeller through, a hissing sound is heard, indicating valve blow by. What procedure should be performed next? |
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Definition
| A compression check should be performed to identify the faulty cylinder |
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Term
| What is the purpose of performing a compression check? |
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Definition
| To determine if the valves, pistons, and rings are sealing properly |
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Term
| When an engine is overhauled, how is the total time affected? When an engine is rebuilt, how is its operating history affected? |
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Definition
| The total time on the engine must be continued and the time since major overhaul is entered into the engine log. If the manufacturer rebuilds the engine, it is granted a zero time status and is considered to have no previous operating history |
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Term
| What inspections should be performed after a propeller strike without sudden stoppage? |
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Definition
| 1. Inspect engine mounts, the crankcase, and the nose section for damage. 2. Inspect the oil and oil filters/screens for metal particles. 3. Inspect the crankshaft or driveshaft for cracks and misalignment |
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Term
| Name some of the precautions that should be performed prior to engine removal. |
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Definition
| Disconnect the battery, turn off the fuel valves, chock the wheels, and if necessary, install a tail stand. |
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Term
| When inspecting a piston, where are cracks most likely to be found? |
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Definition
| In those areas that are highly stressed; usually the base of the piston bosses, inside at the junction of the bore and the walls, and the ring lands |
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Term
| What does it mean if engine parts are within "serviceable limits? " |
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Definition
| It means that the part is within the manufacturer's limits and can be used in an engine (does not require replacement) |
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Term
| What tools or instruments are used to inspect a cylinder barrel for out-of-roundness? |
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Definition
| A dial indicator or inside micrometer is usually used to measure the top of the cylinder and at the skirt. A telescopic gauge and micrometer can also be used. Two readings should be taken 90# to each other |
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Term
| How can a loose stud in an engine crankcase be repaired? |
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Definition
| Remove the loose stud and inspect the hole for size and thread condition. It may be necessary to use an oversize stud and Heli-coil insert |
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Term
| What publication is used to check an engine for normal operation? |
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Definition
| Manufacturer's maintenance manual |
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Term
| A weak cylinder is found during a compression check. What must be inspected? |
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Definition
| Pressure is transmitted equally in all directions |
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Term
| What purpose does an oil analysis serve? |
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Definition
| Metal particles in the metal show normal and abnormal wear of the engine. This helps in evaluating the engine's internal condition |
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Term
| What inspection should be performed on an engine that has been in storage? |
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Definition
| Perform an inspection to determine if there is any corrosion damage |
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Term
| Where would a carburetor air temperature bulb be located? |
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Definition
| In the ram air intake duct |
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Term
| What is the fuel pressure range on float-type carburetors? |
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Definition
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Term
| Name the basic components of a fuel system. |
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Definition
| The transmitter and the indicator |
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Term
| What unit of measure is generally used to indicate fuel flow? |
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Definition
| Pounds or gallons per hour |
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Term
| Why is fuel flow monitored? |
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Definition
| To determine fuel consumption and engine performance |
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Term
| What does the manifold gauge indicate and how is it calibrated? |
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Definition
| It measures the absolute pressure in the engine manifold and is calibrated in inches of Mercury |
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Term
| What directly controls manifold pressure? |
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Definition
| Throttle opening and engine r.p.m. |
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Term
| During engine operation, where should the propeller control be set when checking the manifold pressure? |
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Definition
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Term
| Is the aircraft electrical system required to power a cylinder head temperature gauge? |
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Definition
| No. A thermocouple is used as the electrical source. |
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Term
| What are possible indications of an oil transmitter or indicator malfunction? |
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Definition
| A severe or sudden drop in oil pressure while the oil temperature remains normal and the oil supply remains full |
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Term
| What does a tachometer indicate on a reciprocating engine? |
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Definition
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Term
| Where should the thermocouple be installed on a reciprocating engine using a single probe cylinder head temperature system? |
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Definition
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