| Question | Answer |
| Why are synchro systems commonly used to obtain engine fuel and oil pressure readings?
– It avoids running fuel and oil into the cockpit
– It is more accurate
– It is a simpler system. | It avoids running fuel and oil into the cockpit |
| Aircraft with digital instrumentation
– must use solid state sensors
– can use analog sensors and an analog to digital converter
– must use analog sensors and an air data computer | can use analog sensors and an analog to digital converter |
| One example of a mechanical movement indicator would be a
– vertical speed indicator
– oil temperature gauge
– tachometer | tachometer |
| Which type of aircraft is most likely to use a mechanical tachometer?
– a small multi-engine aircraft
– a small single engine aircraft
– a small glider used for cross country flights | a small single engine aircraft |
| An electrically driven tachometer may make use of
– an AC generator
– a DC generator
– a flexible driveshaft | an AC generator |
| When a generator is used for a tachometer, its frequency is
– directly proportional to engine speed
– inversely proportional to engine speed
– variable based on engine load | directly proportional to engine speed |
| Which instrument would be used to show if 2 or more engines are operating at exactly the same speed?
– Tachometer
– Accelerometer
– Synchroscope | Synchroscope |
| Accelerometers use the principle of
– pressure – inertia – speed | inertia |
| An AOA indicator is a type of
– stall warning device
– airspeed indicator
– accelerometer | stall warning device |
| How many types of AOA indicators are there?(4 Points) – 1 – 2 – 3 | 2 |
| Which form of thermometer is most useful in aviation?
– liquid mercury
– non-contact
– bi-metallic | bi-metallic |
| Electrical resistance thermometers measure temperatures in the ____________ range.
– -10°C-100°C
– -70°C-150°C
– 0°C-150°C | -70°C-150°C |
| Temperature indicators sometimes use a modified form of the ___________________ circuit.
– Wheatstone Bridge
– Series-Parallel
– London Bridge | Wheatstone Bridge |
| Iron and Constantan are commonly used in thermocouples for
– EGT Leads
– CHT Leads
– OAT Leads | EGT Leads |
| The amount of voltage produced by dissimilar metals is measured in
– megavolts
– microvolts
– millivolts | millivolts |
| Total air temperature is static temperature plus
– any rise caused by higher pressures at high altitudes
– any rise caused by high speed movement
– any drop caused by low humidity | any rise caused by high speed movement |
| A numerical compass card is usually graduated in _____ increments.
– 5°
– 10°
– 90° | 5° |
| Why are magnetic compasses filled with fluid?
– To allow movement and make more accurate
– To allow the poles to align
– To dampen oscillations and vibration | To dampen oscillations and vibration |
| The tendency of a compass to show a
turn to the north when accelerating on
an eastern heading is known as
– Magnetic Variation
– Dip Error
– Magnetic Deviation | Dip Error |
| Many remote compass systems are the ___________________ type.
– magnesyn
– dc selsyn
– ac synchro | magnesyn |
| _______________ magnetometers rely on tiny, layered structures that react to magnetism.
– Remote indicating
– Flux gate
– Solid-state | Solid-state |
| Which of the following can be used to power a gyro in an aircraft? (select all that apply)
– Vacuum
– Pressure
– Electricity | Vacuum, Pressure, Electricity |
| The vacuum required for instrument operation is
– 3.5"-4.5" Hg
– 1-2 psi
– 5"-6" Hg | 3.5"-4.5" Hg |
| A venturi used to provide vacuum for instrument systems is generally effective around
– 50 mph
– 100 mph
– 125 mph | 100 mph |
| Pressure driven gyro instruments can use a vacuum pump for their pressure.
– True
– False | True |
