Sensors and instruments Flashcards
Formúlan fyrir capacitance (C) er hver?
a = area of plates
d = Distance between plates
e) dielectric permittivity
C = dielectric permittivity * area of plates / distance between plates
Where is fuel pressure normally measured?
Inlet of the fuel injection metering unit
1 kg af fuel = X lbs
2.2 lbs
An aneroid capsule measures differential/absolute pressure and is used for low/high pressure measurement?
Aneroid capsule measures absolute pressure and is used for low pressure measurements.
Hver er formúla Power?
P = ?
W: Work done
T: Time
P = W / T
Hver er formúla Torque?
T = ?
mátt nota eitthvað af:
F: Force L: Lever arm R: RPM
Torque = Force * lever arm
Hvað lestu úr N1 gauge?
Engine speed
Þú getur mælt torque með því að mæla computed _____ at the fixed crown of an epicycloidal reducer of the main engine _____.
oil pressure, gearbox.
Engine torque may be expressed by:
a) Newton meter
b) Newton per meter
Newton meters
Principle of detection of a vibration monitoring system is based on the use of two ______.
accelerometers.
The engine pressure ratio (EPR) is the ratio of the ___ outlet total pressure to the compressor inlet total pressure.
turbine
Ef það kólnar og bensín minnkar í volume, hvað gerist fyrir density og hvað gerist fyrir dielectric value (Er) ?
Density eykst og dielectric value increasar líka. Muna bara að density og dielectric value virðast haldast hönd í hönd virðist vera.
vibration is indicated in the cockpit as:
a) direct reading
b) frequency
c) proportion to the speed of motor
a) direct reading
Electrical type tachometer measures the ______ of a synchronous motor energized by an alternator
rotation speed
Hvað mælir electronic torque meter system?
a) The twist in the output shaft of an engine
b) The gearbox oil pressure
a) The twist in the output shaft of an engine
The operating principle of a vibration-monitoring system can be done by using the following type of sensors: piezoelectric ___ or magnet
crystal
Hvað er eitt bar mörg PSI ?
15
Hvað mælir capacitive fuel quantity? Fuel ____
mass
Ef þú ert með electrical induction tachometer, hvað ertu laus við?
a) sensitivity to line resistance
b) dependance on aircraft power supply
c) dependance on temperature variations
a) sensitivity to line resistance
b) dependance on aircraft power supply
Ert enn dependant on temperature variations.
A float type fuel gauge is typically a ____ powered system
DC powered
The disadvantage of a single-phase AC generator tachometer is:
the importance of line _____ on the information value
resistance
Unit flow meter measures the ____ of fuel movement
quantity
Hvað táknar “4” sem þú sérð á jet engine vibration indicator?
a) 4%
b) 4 Hz
c) indication of vibration
d) 4% or 4 Hz, depends on type
c) indication of vibration
No units are specified
Pressure is defined as force per unit voume/area
area