Week 6: Engine Instruments

Question 1

Where would you use a manifold pressure gauge?

Answer 1

Reciprocating engines

Question 2

What is the purpose of a manifold pressure gauge?

Answer 2

Show pressure in the manifold and power

Question 3

How would you increase power output?

Answer 3

Either increase rpm or MP

Question 4

Where is MAP taken?

Answer 4

Between throttle and intake valve

Question 5

The manifold pressure gauge measures what type of pressure?

Answer 5

Differential pressure (Atmospheric press and MAP)

Question 6

What does an EPR Gauge measure?

Answer 6

non-direct Jet engine thrust (Pt7/Pt2) (compressor efficiency)(turbojet/fan)

Question 7

What type of aircrafts would you find a Torque Indicator in?

Answer 7

Turboshaft and Turboprop

Question 8

What does a Torque Indicator indicate?

Answer 8

Power setting

Question 9

What does a tachometer measure?

Answer 9

Rotational speed (RPM)

Question 10

A tachometer with % RPM on the front is for what type of aircraft?

Answer 10

Turbine aircraft

Question 11

What instrument indicates the relative speed of the slave engine to the master?

Answer 11

Synchroscope

Question 12

What instrument is displayed?

Answer 12

Manifold Pressure Gauge

Question 13

What instrument is displayed?

Answer 13

Manifold Pressure Gauge

Question 14

What instrument is displayed?

Answer 14

EPR Gauge

Question 15

What instrument is displayed?

Answer 15

Torque Indicator

Question 16

What instrument is displayed?

Answer 16

Tachometer

Question 17

Why would you watch your oil temperature?

Answer 17

To make sure it does not overheat

Question 18

What are the most common types of engine temperature measruing instruments used in aircraft?

Answer 18

Electrical (variable resistance)

Vapour pressure

Elecrtical (Thermocouple)

Question 19

What is the yellow area on a carb temperature indicator?

Answer 19

Carb Icing

Question 20

Thermocouple indicators do not need what?

Answer 20

Aircraft power

Question 21

What are thermocouples for?

Answer 21

Monitoring engine temp for piston and turbine engines

Question 22

How does a thermocouple work?

Answer 22

2 dissimilar metals that compares currents

Question 23

Where is the hot junction of the thermocouple located?

Answer 23

where temp is being taken (output of engine)

Question 24

What are the 2 types of Thermocouple hot junctions?

Answer 24

Gasket and Bayonet type

Question 25

Where are Bayonet type thermocouples most frequent and what do they measure?

Answer 25

Turbine EGT Probes

Question 26

What is the purpose of the holes in an EGT Probe?

Answer 26

Stops airflow to get accurate reading

Question 27

What are the 2 types of Fuel System Monitoring Instruments?

Answer 27

Fuel Flow and Fuel Pressure

Question 28

What does the capacitance fuel quantity system measure?

Answer 28

Fuel quantity and density

Question 29

How do you overcome the affect of tilt in the fuel tank?

Answer 29

Multiple probes then average it

Question 30

What is the compensator and where is it located?

Answer 30

Found low in the tank, compensates for temp variations

Question 31

What does this instrument indicate and where is it mostly found?

Answer 31

Fuel going into the engine, found on turbines

Question 32

What is the purpose of a Mass Flowmeter?

Answer 32

Measures mass fuel flow rate in turbine engines in PP/H or Kg/h

Question 33

What is this instrument?

Answer 33

Mass Flowmeter

Question 34

What is this?

Answer 34

Capacitive Probe that measures fuel quantity and density

Question 35

What is this?

Answer 35

Thermocouple