AMEM 10032 - Avionics and Instruments - Test 1 Questions & Answers
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Course
AMEM 10032 - Avionics
Institution
AMEM 10032 - Avionics
what is the atmospheric pressure (in psi) inches of mercury and temp (in C) according to ICAO standard day? - ANSWERS- 14.7 psi
- 15 c
- 29.92 inches
what is the rate of change in temp with regards to altitude change? - ANSWERS1.98c change for 1000f
what are the 3 ways pressure may be mea...
AMEM 10032 - Avionics and Instruments
- Test 1 Questions & Answers
what is the atmospheric pressure (in psi) inches of mercury and temp (in C) according
to ICAO standard day? - ANSWERS- 14.7 psi
- 15 c
- 29.92 inches
what is the rate of change in temp with regards to altitude change? - ANSWERS1.98c
change for 1000f
what are the 3 ways pressure may be measured? - ANSWERS- absolute pressure
- gauge pressure
- differential pressure
what is absolute pressure compared to and what is its designation? - ANSWERS-
compared to a perfect vacuum
- designated as PSIA or inches of mercury (in Hg) or millibars
can absolute pressure have a negative pressure? - ANSWERSno
what is gauge pressure compared to and what is its designation? - ANSWERS-
atmospheric pressure
- designated as PSIG
how is gauge pressure applied? - ANSWERSpressure applied to a fluid by pump or
other device
what are some applications for using gauge pressure? - ANSWERS- measure engine
oil pressure, fuel pressure, pneumatic pressure
if pressure is added by a pump how is it measured? - ANSWERSgauge pressure
what is differential pressure and what is its designation? - ANSWERS- the difference
between 2 pressures
- designated by PSID and expressed as delta D
on turbine engines _________ pressure switches are used to sense excessive pressure
drops across ________ filters and turn on warning lights to alert pilots and crew -
ANSWERSdifferential, fuel
absolute pressure is the sum of what two pressures? - ANSWERSgauge pressure +
atmospheric pressure
, the most precise device for measuring absolute pressure, but not practical for use on
aircraft is the? - ANSWERSmercury barometer
what is the most common differential pressure gauge found on an aircraft? -
ANSWERSairspeed indicator
what inputs does the airspeed indicator use? - ANSWERS- static ports
- pitot probes
what sensing devices are used for measuring pressure on aircraft - ANSWERS- capsule
- diaphragms
- aneroid
- bourdon tube
several capsules or diaphragms connected in series are called? - ANSWERSbellows
what is a sealed capsule? - ANSWERSan evacuated, concentrically corrugated metal
shell used to measure pressure in altimeters
how do you measure high pressure? - ANSWERSa bourdon tube type instrument is
used
how do you measure low pressure - ANSWERSsealed capsule is used
why is integrity of the case on an ASI critical for accurate indication of an aircrafts
airspeed - ANSWERSstatic pressure is taken into the sealed instrument case and
compared to pitot pressure taken into the diaphragm
what happens to pitot pressure and the diaphragm as aircraft speed increases -
ANSWERSit increases and the diaphragm expands
what two changes in atmospheric pressure affect pitot static pressures? -
ANSWERSaltitude (height)
temperature
list the various types of airspeed with reference to the ASI - ANSWERS- indicated
airspeed
- calibrated airspeed
- true airspeed
what is indicated airspeed? - ANSWERSdirect uncorrected reading of an airspeed
indicator
what is calibrated airspeed? - ANSWERSthis is indicated airspeed which has been
corrected for position and instrument error
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