SEA

1  which flight rules reguire the most instrument ?

A  instrment flight rule

 

2   what do we mean by the term " differential pressure"?

A   differential pressure is the comparison between two different pressures. the most   common differential pressure gauge found on an aircraft is the airspeed indicator theis instrument measures the difference between ram air or pitot pressure,and the static or ambient air pressure.

 

3 name the categories of instruments according to their means of application

A engine instrments

  flight and navigation instruments

  system instrments

 

4 name five instrment panels to be found in a large category aircraft

A main instrment panel

  overhead panel

  centre pedestral panel

  flight engine panel

  side panel

 

5 what are border lines painted around the flight instrments called?

A mental focus line

 

6 brieflye describe quantitative and qualitative displays.

A quantitative is presented in term of a numerical valve and by the relative postion of a pointer or index, qualitative is the information presented in symbolic or pictorical  form.

 

7 when an instrment has ot be transported to another location, what marking should be o the outside of the container?

A put the tag on the instrment and put the sticker labed "FRAGILE" on the package

 

8 how are operational rauges and parameters often indicated on tnstrments?

A a slippage mark must be placed on all gauges that hare rauge markings on the front glass of the instrment

 

red-maximum and minimum acceptable

yellow-caution range

green-normal operating range

 

9 name the materials used in thermocouple wires and their colors?

A lron--black

  copper--red

  contantan--yellow

  chromel--white

  alumel--green

 

10 what are micro-switches replaced with on large madern commercial jet liners?

A  poximity switch

 

11 name the flight instrments that use only static pressure

A  altimeter

   vertical speed indicator

 

12 name the instrment that uses both static and pitot pressures and describe what the two pressures are connected o in the instrment

A airspeed indicator

  static pressure--ambient are pressure

  pitot pressure--ram air pressure

  static pressure is the atmospheric pressure outside the aircraft

  ram pressure is created by the aircraft's forward motion

 

13 describe what type of temperature measuring system would you use for measuring low and high temperature

A  wheatsone bridge  or thermocouple

 

14 what type of fuel guantity seusors are used injet aircraft fuel tanks?

A capacitance--type fuel indicator system

 

15 what do the fuel and air, injet aircraft fuel tanks, act as when referring to fuel guantity indication system?

A a capacitor is a device that can store an electrical charge. it consists of two conductive plates sparated by an insulator called a die lectric. the probes in a capacitauce fuel guantity indicating system consist of thw concentric metal tubes that serve as the plates of the capacitor when the tank is empty, the plates are separated by air that has a dielectric constant of one. when the tank is full, the dielectric is fuel that has a constant of approximately two. between full and empty part of the dielectric is air, part is fuel, and so the capacitance of the probe varies according to the level of fuel in the tank.