Jeppesen Oral- Chapter 5 (Induction Systems)

Answer 1

air scoop, carburetor or fuel control, intake manifold

Answer 2

Engine will not produce its rated power or not run at all.

Answer 3

Reduces power

Answer 4

impact ice, fuel evaporation ice, throttle ice

Answer 5

Lower rpm, throttle is mostly closed which offers greater surface area for ice to accumulate

Answer 6

Engine runs rough at lower r.p.m.

Answer 7

Noticeable power loss

Answer 8

Detonation

Answer 9

Internally and externally dirven

Question 10

How and what point does an internally driven supercharger boost air pressure?

Answer 10

Impeller compresses the fuel/air mixture after it leaves the carbuetor

Answer 11

Will not be able to develop rated H.P. at certain altitudes and may not be able to reach critical altitude

Answer 12

Controls the amount of exhaust gas directed over the turbine

Answer 13

Waste-gate controller malfunction

Answer 14

Mechanically with linkages Hydraulically with engine oil

Answer 15

sonic venturi

Answer 16

Causes air velocity to decrease which increases pressure and aids in compression

Answer 17

It accelerates the flow of incoming air and debris through a curved intake. The debris gains TOO much inertia to allow it to follow the curved intake towards the engine and thus is channeled away from the compressor

Answer 18

Engine bleed air and electric heating elements

Question 19

Where does the alternative air come from that is used with a pressure carburetor or a fuel injection system?

Answer 19

From inside the engine cowling.

Question 20

Where does carburetor ice normally form in a carburetor?

Answer 20

In the throat of the carburetor, on and around the throttle valve.

Question 21

Does the application of carburetor heat cause the fuel-air mixture to become richer or leaner?

Answer 21

Heated air causes the fuel-air mixture to become richer.

Question 22

What is meant by a convergent inlet duct for a turbine engine?

Answer 22

A convergent duct is one whose cross-sectional area becomes smaller in the direction air flows.

Question 23

What is meant by a divergent inlet duct for a turbine engine?

Answer 23

A divergent duct is one whose cross-sectional area becomes greater in the direction the air flows.

Question 24

What kind of inlet is often used on turbine-powered helicopters?

Answer 24

A bell-mouthed inlet duct

Question 25

What is the dander of operating an aircraft reciprocating engine with too high a carburetor air temperature?

Answer 25

Too high a carburetor air inlet temperature can cause the fuel-air mixture to reach its critical temperature and detonate.

Question 26

Why do some turbine engines use variable inlet guide vanes?

Answer 26

These variable inlet guide vanes are automatically adjusted to direct he air into the engine in such a way the it keeps the RPMs vs. velocity proper for the most efficient operation.

Question 27

How do some turbine engines prevent ice formation on the inlet guide vanes?

Answer 27

Hot compressor bleed air flows through hollow inlet guide vanes.

Question 28

What is usually installed in a large reciprocating engine between the turbosupercharger and the carburetor?

Answer 28

An intercooler. This is an air-to-air heat exchanger.

Question 29

In what position should the carburetor heat control be placed when starting a reciprocating engine?

Answer 29

In the COLD position

Question 30

How does an engine air inlet vortex destroyer help prevent foreign object damage to the engine?

Answer 30

A high-velocity stream of compressor bleed air is blown out in front of the engine to break up the vortices that form in front of the engine when it is operating at high power on the ground.