AEIS CHAPTER 7

Question 1

engine instruments indicate i)

Answer 1

the operating parameters of an aircraft’s engine

Question 2

operating parameters include

Answer 2

quantity, pressure, temperature and speed

Question 3

Manifold pressure gauge is used to indicate i)

Answer 3

the absolute pressure of the fuel-air mixture inside the intake manifold

Question 4

MAP refers to

Answer 4

manifold absolute pressure

Question 5

engine power output is represented via the i)

Answer 5

manifold pressure gauge

Question 6

as the throttle setting is increases, MAP i)

Answer 6

increases

Question 7

when the engine is not running, the manifold pressure gauge indicates i)

Answer 7

ambient air pressure

Question 8

engine failure or power loss is indicated on the manifold gauge as an i)

Answer 8

increase in manifold pressure value corresponding to ambient air pressure at the altitude of failure occurence

Question 9

green arc in a manifold pressure gauge indicates

Answer 9

normality

Question 10

red mark in a manifold pressure gauge indicates

Answer 10

manifold limit

Question 11

manifold pressure reading is proportional to i)

Answer 11

engine power input

Question 12

tachometers indicate the i) in a reciprocating engine

Answer 12

speed of the crankshaft

Question 13

tachometers indicate the i) in a gas turbine engine

Answer 13

speed of compressor shaft

Question 14

what are the two types of tachometers

Answer 14

mechanical and electrical

Question 15

mechanical type tachometers include the i)-type and the ii) type

Answer 15

centrifugal type, magnetic drag-cup type

Question 16

electrical type tachometers include the i)-type and the ii) type

Answer 16

DC-type, AC-type

Question 17

why are AC-type tachometers preferred over DC-type tachometers

Answer 17

AC-type eliminates the use of brushes and commutators, thus it has a minimum error margin compared to the DC-type

Question 18

thermocouples consist of i) wires of different ii)

Answer 18

2, metals

Question 19

temperature is measured at the i) junction

Answer 19

hot

Question 20

when the hot junction experiences a change in temperature, a i) is created at the cold junction

Answer 20

corresponding voltage

Question 21

the corresponding voltage created at the cold junction can be used to indicate the i)

Answer 21

temperature

Question 22

which thermocouples type has good thermal contact

Answer 22

surface contact type

Question 23

which thermocouples type is used for the measurement of gases

Answer 23

immersion type

Question 24

which thermocouples immersion types is deployed depending on the velocity of the engine exhaust gases

Answer 24

stagnation type and rapid response type

Question 25

stagnation type thermocouples are used on i) engines

Answer 25

jet engines

Question 26

rapid response type thermocouples are used on i) engines

Answer 26

turboprop engines

Question 27

thermocouple cold junction is prone to temperature fluctuations and thus i)

Answer 27

compensation needs to be incorporated to offset inaccuracies

Question 28

what are the two main methods of fuel quantity measurement

Answer 28

float-type and capacitance-type

Question 29

capacitance type is the more preferred method because it is i)

Answer 29

highly accurate

Question 30

fuel flow measurement system monitors the i)

Answer 30

fuel pressure at the injectors

Question 31

the fuel pressure at the injector indicates the i)

Answer 31

fuel flow

Question 32

why can the fuel pressure be used to indicate the fuel flow?

Answer 32

fuel flow is proportional to pressure drop across the fuel injectors

Question 33

limitation to the use of fuel pressure as flow indicator is that if an injector is i), the pressure gauge will indicate ii)

Answer 33

clogged, a higher fuel pressure which means greater fuel flow

Question 34

on large reciprocating engine aircraft, a i) type fuel flow meter is used

Answer 34

vane-type

Question 35

AoA refers to

Answer 35

angle of attack

Question 36

angle of attack (AoA) can also be referred to as

Answer 36

alpha angle

Question 37

AoA is the angle between i) and the i)

Answer 37

angle between wing chord line and the direction of relative airflow

Question 38

AoA determines the magnitude of i)

Answer 38

lift generated by a wing

Question 39

Lift i) as AoA increases

Answer 39

increases

Question 40

Critical AoA is also known as i)

Answer 40

stalling angle

Question 41

stalling angle is typically between

Answer 41

12 to 18 degrees