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AMT Powerplant Quiz

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1. Install, troubleshoot and remove propellers (8978)
What is the basic purpose of the three small holes (No. 60 drill) in the tipping of wood propeller blades?
A - To provide a means for inserting balancing shot when necessary.
B - To allow the moisture which may collect between the tipping and the wood to escape (vent the tipping).
C - To provide a means for periodically impregnating the blade with preservation materials.
 
2. Inspect check troubleshoot service and repair engine cooling systems (8831)
Reciprocating engines used in helicopters are cooled by
A - a fan mounted on the engine.
B - blast tubes on either side of the engine mount.
C - the downdraft from the main rotor.
 
3. Overhaul reciprocating engine (8029)
When is the fuel/air mixture ignited in a conventional reciprocating engine?
A - Shortly before the piston reaches the top of the compression stroke.
B - When the piston reaches top dead center on the compression stroke.
C - When the piston has reached top dead center of the intake stroke.
 
4. Inspect, check, service and repair reciprocating engines and engine installations (8073)
If an engine cylinder is to be removed, at what position in the cylinder should the piston be?
A - Halfway between top and bottom dead center.
B - Top dead center.
C - Bottom dead center.
 
5. Inspect, check, service and repair reciprocating engines and engine installations (8050)
Which of the following will be caused by excessive valve clearance of a cylinder on a reciprocating aircraft engine?
A - Intake and exhaust valves will open early and close late.
B - A power increase by shortening the exhaust event.
C - Reduced valve overlap period.
 
6. Install, troubleshoot and remove propellers (8973)
If propeller cones or hub cone seats show evidence of galling and wear, the most likely cause is
A - the front cone was not fully bottomed against the crankshaft splines during installation.
B - the propeller retaining nut was not tight enough during previous operation.
C - the pitch change stops were located incorrectly, causing the cone seats to act as the high pitch stop.
 
7. Inspect, check, service and repair fixed pitch constant speed and feathering propellers and propelle (8912)
How is a propeller controlled in a large aircraft with a turboprop installation?
A - Independently of the engine.
B - By the engine power lever.
C - By varying the engine RPM except for feathering and reversing.
 
8. Inspect, check, service, troubleshoot and repair engine fire detection and extinguishing systems (8331)
A fire detection system that operates on the rate of temperature rise is a
A - continuous loop system.
B - thermal switch system.
C - thermocouple system.
 
9. Install troubleshoot and remove reciprocating engines (8102)
One of the best indicators of reciprocating engine combustion chamber problems is
A - spark plug condition.
B - starting difficulties.
C - excessive engine vibration.
 
10. Inspect, check, service, troubleshoot and repair engine fire detection and extinguishing systems (8320)
Which of the following is NOT used to detect fires in reciprocating engine nacelles?
A - Flame detectors.
B - Rate of temperature rise detectors.
C - Smoke detectors.