AMT 113 INSTRUMENTS EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
The angle-of-attack detector operates from differential pressure when the airstream - Answers is not
parallel to the true angle of attack of the aircraft.
A barometric altimeter indicates pressure altitude when the barometric scale is set at - Answers
29.92 "Hg.
What marking color is used to indicate if a cover glass has slipped? - Answers White.
Instrument static system leakage can be detected by observing the rate of change in indication of the
- Answers altimeter after suction has been applied to the static system to cause a prescribed
equivalent altitude to be indicated.
Which of the following causes of aircraft magnetic compass inaccuracies may be compensated for by
mechanics? - Answers Deviation.
At sea level, when the average atmospheric pressure is 14.7 psi, the barometric pressure is - Answers
29.92 "Hg.
A certificated mechanic may perform - Answers 100 hour inspections of instruments
A certificated mechanic with airframe and powerplant ratings may - Answers perform minor repairs
and minor alterations to aircraft instruments.
When selecting hardware for attaching bonding connections to an aircraft structure, which of the
following should be considered? - Answers Mechanical strength, ease of installation, amount of
current to be carried.
Aircraft instrument value should be marked and graduated in accordance with - Answers the specific
aircraft maintenance or flight manual.
Which condition would be most likely to cause excessive vacuum in a vacuum system? - Answers
Vacuum relief valve improperly adjusted.
When performing the static system leakage check required by 14 CFR 91.411, the technician utilizes -
Answers negative pressure.
Aircraft temperature thermocouple leads may - Answers not be altered and are designed for a
specific installation.
The requirements for testing and inspection of instrument static systems required by 14 CFR 91.411
are contained in - Answers Part 43, appendix E.
Where may a person look for the information necessary to determine the required markings on an
engine instrument? - Answers Aircraft flight manual or aircraft maintenance manual.
How is a flangeless instrument case mounted in an instrument panel? - Answers By an expanding-
type clamp secured to the back of the panel and tightened by a screw from the front of the
instrument panel.
Which instrument condition is acceptable and would not require correction? - Answers Case paint
chipped.
What must be done to an instrument panel that is supported by shock mounts? - Answers Bonding
straps must be installed across the instrument mounts as a current path.
A turn coordinator instrument indicates - Answers both roll and yaw
The red radial lines on the face of an engine oil pressure gauge indicates - Answers minimum and/ or
maximum safe operating limits.
Which of the following operating mechanisms would be found in a hydraulic pressure gauge? -
Answers Bourdon tube.
The maximum deviation (during level flight) permitted in a compensated magnetic direction indicator
installed on an aircraft certificated under 14 CFR Part 23 is - Answers 10__degrees__.
When an airplane's primary flight control surfaces are set for a particular phase of flight, such as
landing or takeoff, the corresponding control-surface indicating system will show - Answers trim
position.
Which of the following instruments are controlled by gyroscopes? - Answers Attitude indicator,
heading indicator, and turn needle of the turn-and-slip indicator.
The green arc on an aircraft temperature gauge indicates - Answers the desirable temperature range.
Fuel flow transmitters are designed to transmit data - Answers electrically.
Which statement regarding an aircraft instrument vacuum system is true? - Answers Dry-type
vacuum pumps with carbon vanes are very susceptible to damage from solid airborne particles and
must take in only filtered air.
An airspeed indicator measures the differential between - Answers pitot and static air pressure.
The angle-of-attack detector operates from differential pressure when the airstream - Answers is not
parallel to the true angle of attack of the aircraft.
A barometric altimeter indicates pressure altitude when the barometric scale is set at - Answers
29.92 "Hg.
What marking color is used to indicate if a cover glass has slipped? - Answers White.
Instrument static system leakage can be detected by observing the rate of change in indication of the
- Answers altimeter after suction has been applied to the static system to cause a prescribed
equivalent altitude to be indicated.
Which of the following causes of aircraft magnetic compass inaccuracies may be compensated for by
mechanics? - Answers Deviation.
At sea level, when the average atmospheric pressure is 14.7 psi, the barometric pressure is - Answers
29.92 "Hg.
A certificated mechanic may perform - Answers 100 hour inspections of instruments
A certificated mechanic with airframe and powerplant ratings may - Answers perform minor repairs
and minor alterations to aircraft instruments.
When selecting hardware for attaching bonding connections to an aircraft structure, which of the
following should be considered? - Answers Mechanical strength, ease of installation, amount of
current to be carried.
Aircraft instrument value should be marked and graduated in accordance with - Answers the specific
aircraft maintenance or flight manual.
Which condition would be most likely to cause excessive vacuum in a vacuum system? - Answers
Vacuum relief valve improperly adjusted.
When performing the static system leakage check required by 14 CFR 91.411, the technician utilizes -
Answers negative pressure.
Aircraft temperature thermocouple leads may - Answers not be altered and are designed for a
specific installation.
The requirements for testing and inspection of instrument static systems required by 14 CFR 91.411
are contained in - Answers Part 43, appendix E.
Where may a person look for the information necessary to determine the required markings on an
engine instrument? - Answers Aircraft flight manual or aircraft maintenance manual.
How is a flangeless instrument case mounted in an instrument panel? - Answers By an expanding-
type clamp secured to the back of the panel and tightened by a screw from the front of the
instrument panel.
Which instrument condition is acceptable and would not require correction? - Answers Case paint
chipped.
What must be done to an instrument panel that is supported by shock mounts? - Answers Bonding
straps must be installed across the instrument mounts as a current path.
A turn coordinator instrument indicates - Answers both roll and yaw
The red radial lines on the face of an engine oil pressure gauge indicates - Answers minimum and/ or
maximum safe operating limits.
Which of the following operating mechanisms would be found in a hydraulic pressure gauge? -
Answers Bourdon tube.
The maximum deviation (during level flight) permitted in a compensated magnetic direction indicator
installed on an aircraft certificated under 14 CFR Part 23 is - Answers 10__degrees__.
When an airplane's primary flight control surfaces are set for a particular phase of flight, such as
landing or takeoff, the corresponding control-surface indicating system will show - Answers trim
position.
Which of the following instruments are controlled by gyroscopes? - Answers Attitude indicator,
heading indicator, and turn needle of the turn-and-slip indicator.
The green arc on an aircraft temperature gauge indicates - Answers the desirable temperature range.
Fuel flow transmitters are designed to transmit data - Answers electrically.
Which statement regarding an aircraft instrument vacuum system is true? - Answers Dry-type
vacuum pumps with carbon vanes are very susceptible to damage from solid airborne particles and
must take in only filtered air.
An airspeed indicator measures the differential between - Answers pitot and static air pressure.
