Aircraft Instrument Systems

Question 1

A static check may be performed on a manifold pressure gauge by using what piece of information?

Answer 1

Current atmospheric pressure

Question 2

What aircraft instrument can be used to check a manifold pressure gauge for proper indication?

Answer 2

the sensitive altimeter

Question 3

Name several of the indication error that may be found in altimeters?

Answer 3

Scale errors, hysteresis, friction, installation

Question 4

What is the signal source in an electrical resistance type temperature indicating system?

Answer 4

a temperature bulb or sensing element

Question 5

What type of temperature sensing system is normally used to measure a turbine engine exhaust gas temperature?

Answer 5

A thermocouple type system

Question 6

what operating parameter is indicated by a tachometer?

Answer 6

Engine RPM

Question 7

What is the name of the effect that causes a gyro to respond to an applied force at a point 90 degrees further in the direction of rotation?

Answer 7

Gyroscopic precession

Question 8

What are the three sources of power used to drive a gyroscopic turn indicator?

Answer 8

Air from a vacuum or pressure source, or an electric motor

Question 9

what are two items that should be considered during inspection of a magnetic compass?

Answer 9

The fluid must be clear
The housing must be full with no bubbles
The card must be legible and the lubber line intact
The compass should be properly calibrated

Question 10

In what way do magnetic field generated by electrical equipment and steel part in the airplane effect a magnetic compass?

Answer 10

Stray magnetic fields deflect the compass from correct alignment with the earth’s magnetic field

Question 11

Describe the basic operating concept of a synchro-type remote indicating system.

Answer 11

A remote transmitter electrically signals a receiver inside the instrument

Question 12

what aircraft instruments are connected to the pitot-static system?

Answer 12

The altimeter, Vertical speed indicator, airspeed and mach meter in high performance jets.

Question 13

Why should you avoid cleaning obstruction from the sensing holes in a pitot-static system with a tool?

Answer 13

The holes are aerodynamically critical

Question 14

After components in a pitot static system have been replaced, what test or inspections are required?

Answer 14

The static system leak test specified by FAR 91.411

Question 15

What quantity is accurately measured by a capacitance type fuel quantity indicating system?

Answer 15

The mass of the fuel

Question 16

Who is authorized to apply the range markings to an instrument dial face?

Answer 16

The manufacturer or a certificated instrument repair station

Question 17

What is the purpose of a slippage mark on an instrument glass?

Answer 17

To indicate if the glass has moved, which could cause incorrect range markings on an instrument that has the range markings painted on the glass

Question 18

What references should be consulted to determine the proper range marking for aircraft instruments?

Answer 18

The aircraft maintenance manual, aircraft flight manual, type certificate data sheet, aircraft specifications

Question 19

What is the meaning of a yellow arc on an aircraft instrument?

Answer 19

A caution or limited flight operation range

Question 20

What is the reason for “swinging” a compass and how is it accomplished?

Answer 20

To compensate for deviations, caused by magnetic fields in the aircraft, by adjusting the compensating magnets.