Reciprocating engines Question and Answers

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References: prepware powerplant (reciprocating and turbine engines) AND youtube about sa concepts sa engines

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26 Terms

1
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c

Reciprocating engines use a fuel and air mixture which is then ignited, this combustion, forces the piston into a
a. Rotational motion transformed into a linear motion
b. Linear motion transformed into a linear motion
c. Linear motion transformed into a rotational motion
d. Rotational motion transformed into a rotational motion

2
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a

Radial engine section that houses and supports a propeller governer drive shaft, a cam ring, and a propeller reduction gear assembly
a. Nose section
b. Power section
c. Supercharger Section
d. Accessory Section

3
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a

It supports the crankshaft, transmits stress from the crankshaft to the crankcase
a. Main bearing Journals
b. Crankpins
c. Crankarm/ Crank cheek
d. Counterweights and Dampers

4
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c

The main part of an aircraft that produces lift?
a. Fuselage
b. Stabilizers
c. Wings
d. Engine

5
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b

_____ guides the valve in a straight path and keeps the valve concentric to its seat
a. Valve track
b. Valve Guide
c. Valve path
d. Valve Center

6
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a

____ ensures that the valaves remain closed except when operated by the camshaft
a. Valve springs
b. Connecting rod
c. Pushrod
d. Rocker Arm

7
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b

Fluid that reduces friction and wear by preventing the moving surfaces from coming into contact
a. coolant
b. Lubricant
c. Fuel
d. Bearings

8
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b

Converts the linear motion of the piston into a rotational motion, transfers the torque to the propeller
a. Camshaft
b. Crankshaft
c. Connecting Rod
d. Crankcase

9
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b

Collect the exhaust gases from the cylinders, removes harmful substances, reduces the level of noise
a. Intake System
b. Exhaust system
c. Ignition System
d. Fuel System

10
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d

The five events of a four-stroke cycle engine in the order of their occurrences are
a. Intake, power, ignition, compression, exhaust
b. intake, ignition, compression, power exhaust
c. intake, power, compression, ignition, exhaust
d. intake, compression, ignition, power, exhaust

11
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c

A nine-cylinder engine with a bore of 5.5 inches and a stroke of 6 inches will have a total piston displacement of
a. 740 cubic inches
b. 1,425 cubic inches
c. 1,283 cubic inches
d. 1,345 cubic inches

12
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b

Engine ignition system belongs to ATA Chapter
a. 73
b. 74
c. 75
d. 76

13
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a

What publication is used for guidance to determine whether a powerplant repair is major or minor?
a. Federal Aviation Regulations, Part 43, appendix A
b. Airworthiness Directives
b. Technical Standards Orders
d. Service bulletins

14
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c

A fuel ration of 11:1 normally refers to
a. a stoichiometric mixture
b. 1 part of air, 11 parts of fuel
c. 1 part of fuel, 11 parts of air
d. 1.1 part of fuel, 1 part of air

15
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d

The device that controls the volume and the fuel/air mixture to the cylinders is called a
a. mixture control
b. metering jet
c. tachometer
d. throttle valve

16
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b

An engine-driven air pump that increases manifold pressure and forces the fuel/air mixture into the cylinders which has the effect of increasing the power output of the engine
a. Compressor
b. Supercharger
c. Diffuser
d. Turbocharger

17
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a

Defined as the distance traveled by a piston inside the cylinder assembly
a. stroke
b. bore
c. Event
d. Cycle

18
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d

The ____ type of engine has two banks of cylinder directly opposite each other with a crankshaft in the middle
a. Radial
b. In-line
c. V-type
d. opposed

19
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c

The ___ is the link which transmits forces between the piston and the crankshaft
a. Camshaft
b. Compression Stroke
c. Connecting Rod
d. Power Stroke

20
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c

The _____ type connecting rod is used on horizontally opposed engines
a. master and articulated
b. fork and blade
c. Plain
d. normal

21
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a

Ability to rotate the propeller blade so that the leading edge of each blade is pointed straight forward into the wind
a. Featherable Propeller
b. Constant-speed propeller
c. Controllable propeller
d. Reversible propeller

22
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b

In reciprocating engines, what type of lubrication system circulates oil?
a. Wet sump
b. Dry sump
c. Scavenge sumo
d. Reactive sump

23
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b

What piston ring prevents gas leakage to the crankcase?
a. Oil ring
b. Compression ring
c. Exhaust ring
d. Rotary ring

24
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b

What are the movement of the articulated rods in a radial engine
a. Full circle movement
b. Elliptical movement
c. Reciprocating movement
d. Hexagonal movement

25
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a

____ has the diameter at the top portion of the barrel smaller that the diameter at the cylinder skirt
a. Choke Bore Cylinder
b. Tapered Bore Cylinder
c. Straight Bore Cylinder
d. Open Bore Cylinder

26
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a

What are the movement of the master rods in a radial engine
a. Full circle movement
b. Elliptical movement
c. Reciprocating movement
d. Hexagonal movement