Instrumentation 2

Thermocouple? Thermocouple type temperature sensor ?

The red pointer which is normally on the red line in the EGT indicators 

Electrical requirements for an alumel/chromel indicating system are:

C ind Fahreneinheit?

The main advantage of a ratiometer-type temperature indicator is that it:

A millivoltmener measuring the electromotive force between the hoz junction and the cold junction of a thermocouple can be directly graduated in temperature values provided that the temperature of the: 

The measurment of the turbine tempaerature or of the EGT is carried out at the: 

Iron and brass are commonly used in bimetallic therometers. because 

Given 

E = electromotive force

T = hot junction temperature 

K = constant 

teh relationship that applies to a thermocouple is:

The pressure of 1 bar equals to:

a manifold pressure gaug of a piston engine measures:

bar in psi   und 1 Bar in Pascal

The probe used to measure the air intake pressure of a gas turbine engined powerplant is:

Different pressure sensor are used according to the intensity of teh pressure measured (low/medium/high) Classify the following sensors by order of increasing pressure for which they are suitable?

1) bellow type

2) Bourdon tube type

3) aneroid capsule type

The engine instrument utilising an aneroid pressure diaphragm is the:

An aneroid  capsuele:

1) measures differential pressure

2) measures absolute pressure

3) is used for low preesure measurement

4) is used for very high pressure measurement 

in a capacitance fuel gauge => Formula?

The principle of capacity gauges is based on :

The gauge indicating the quantity of fuel measured by a capacity gauging system can be graduated directly in weigh units because the dielectric constant of fuel is:

The indication of a fuel foat gauge varies with: 

1) aircraft attitude

2) accelerations

3) atmospheric pressure

4) fuel temperature 

Q= charge (Coulombs)

C= capacitance (Farads)

U= potential difference between the plates (Volt)

==> relationship between?

1) the quantity of fuel can be measured by volume

2) the quantity of fuel can be measured by mass

The principle of capacity gauges is based on the capacitance variation of:

In a compensated capacitance type quantity indicating system, the contents gauge of a half-full fuel tank indicates a fuel mass of 8000kg. If a temperature rise increased teh volume of fuel by 5%, teh indicated fuel mass would:

Concerning a fuel gauge system, a pilot is more interested in the 

In an average or heavy weight trasnport airplane, generally, teh fuel quantity is measured by capacitor gauges because these give:

1) indications partly independent of fuel temperature variations 

2) indications almost independent of the airplane's attitude and accelerations

3) indications expressed in desnity 

if the tanks of your airplane only contain water, the capacitor gauges indicate

teh quantity of fuel in teh tanks is measured by capacitor type contents gauges. The working principle of these sensors is to meaasure the: 

a paddle-wheel placed in teh fuel circuit of a gas turbine engine initially measures 

Total fuel consumption is obtained by:

EPR is 

Gas turbine engine speed is most commonly indicated to the pilot in form of:

Considering a modern thrust computer, during a steady climb:

The Engine pressure ratio (EPR) is computed by:

If an EPR is set at a constant value, with an increasing OAT, teh thrust:

The operating principle of the electrical type of tachometer is to measure the:

The advatages of an electrical induction tachometer are:

1) the display is not sensitive to line resistance

2) the measuremen is indepednet of aircraft power supply 

3) the measurement is indepndent of temperature variations

4) the option to use without restriction several indicators conencted in parallel to a single transmitter 

The advantages of a DC generator tachometer are: 

1) easy transmission of teh information 

2) independance of the information relative to the electrical power supply 

3) freedom from any spurious current due to the commutator 

The advanatages of an electrical induction tachometer are:

1) the display is not sensitive to line resistance

2) the measurement is independent of aircraft power supply

3) the measurement is independent of temperature variations

4) the option to use without restriction several indicators connected in parallel to a single trasnmitter 

a magnetic tachometer consist of: