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Flashcards in Reciprocating Engines Deck (38):
1

A cold cylinder is found when troubleshooting a running engine. What does this indicate

No combustion in the cylinder

2

When pulling a propeller through a hissing sound is heard, indicating valve blow-by. What procedure should be performed next

A compression check to identify faulty cylinder

3

What is the purpose of performing a compression test

To determine if the valves, pistons and rings are sealing properly

4

Name some of the precautions that should be performed prior to engine removal

Disconnect the battery, turn off the fuel valves, chock the wheels, and if necessary, install a tail stand

5

When inspecting a piston where are cracks most likely to be found

In areas with high stress
1.Base of piston bosses
2. Inside at the junction of the bore and walls
3. Ring lands

6

What does it mean if an engine part is within serviceable limits

The part is within manufactures limits and can be used in an engine

7

What tools or instruments are used to inspect a cylinder barrel for out of roundness

Dial indicator or inside micrometer

8

What publication is used to check an engine for normal operation

Manufacturers maintenance manual

9

A weak cylinder is found during a compression check. What must be inspected

Pressure is transmitted equally in all directions

10

What does a tachometer indicate on a reciprocating engine

Engine R.P.M

11

Is the aircraft electrical system required to power a cylinder head temperature gage

No. Thermocouple is the source

12

Where should the thermocouple be installed on a reciprocating engine using a single probe cylinder head temperature system

On the hottest cylinder

13

What directly controls manifold pressure

Throttle opening and engine r.p.m

14

During engine operation where should the propeller control be set when checking the manifold pressure

Low pitch, high r.p.m

15

What unit of measure is generally used to indicate fuel flow

Pounds or gallons per hour

16

Name the basic components of a fuel system

Transmitter and the indicator

17

What is the fuel pressure range on float type carburetors

3 to 5 psi

18

Where would a carburetor air temperature bulb be located

In the ram air intake duct

19

What inspection should be performed on an engine that has been in storage

inspect for corrosion or damage

20

What purpose does an oil analysis serve

shows normal and abnormal wear of the engine.

21

What inspection should be performed after a propeller strike without sudden stoppage

1. Inspect engine mounts , crankcase and nose section for damage
2. Inspect oil and oil filters/ screens for metal partials
3. Inspect crankshaft or driveshaft for cracks and misalignment

22

What are two main causes of a cylinder having low compression

Piston rings and valves not seating or broken

23

How is a hydraulic lock removed from an aircraft engine

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

24

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

30 degrees before top center on the compression stroke

25

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

Propeller, lubrication ,ignition,fuel metering,cooling and the exhaust systems

26

Where can you find the correct grade of fuel and amount of engine lubricating oil for an aircraft engine

Type certificate data sheet for the aircraft

27

What is the purpose of dynamic dampers on crankshafts

Reduce engine vibration

28

What type of bearings are generally found in reciprocating engines

Plain, ball and roller bearings

29

Name the different types of piston rings

Oil control, compression an oil scraper

30

What could result from incorrectly installed piston rings

Excessive oil consumption

31

What is used to help prevent valve surge or floating in an engine

Two or more springs are used on each valve

32

On engines equipped with hydraulic valve lifters what should the running valve clearance be

Zero

33

What is the purpose of valve overlap

It allows better volumetric efficiency and lowers cylinder operating temperatures

34

What are the purpose of oil control rings

Used to control the thickness of the oil film on the cylinder walls

35

What type of piston rod are commonly found in radial engines

Master and articulating rod assembly

36

What caused an engine to sudden stop

Striking an object or engine seizure due to internal damage

37

What indications are given in the event of a leaking or open primer while the engine is running

Engine will not idle properly

38

A cold cylinder is found when troubleshooting a running engine. What does this indicate

No combustion in that cylinder