Podcast
Questions and Answers
Why is measuring fuel quantity in pounds more accurate than in gallons?
Why is measuring fuel quantity in pounds more accurate than in gallons?
- Fuel density remains constant
- Fuel volume increases when temperature decreases
- Fuel volume varies with temperature change (correct)
- Fuel volume varies with changes in atmospheric pressure
What should happen to engine RPM when moving the mixture control into the idle cutoff position?
What should happen to engine RPM when moving the mixture control into the idle cutoff position?
- It should remain the same until the cutoff is effected, then drop rapidly (correct)
- It should remain constant
- It should slightly increase before the engine starts to die
- It should slightly decrease and then drop rapidly
How should valves downstream of boost pumps be checked during fuel system inspection?
How should valves downstream of boost pumps be checked during fuel system inspection?
- With the pumps shut off
- With the pumps operating (correct)
- With the pumps at idle
- With the pumps dormant
What is a characteristic of integral fuel tanks on transport aircraft?
What is a characteristic of integral fuel tanks on transport aircraft?
What is the purpose of a normal fuel crossfeed system operation in multiengine aircraft?
What is the purpose of a normal fuel crossfeed system operation in multiengine aircraft?
How many engine-driven fuel pumps are required per engine?
How many engine-driven fuel pumps are required per engine?
What would be indicated by the presence of fuel stains around a fuel nozzle?
What would be indicated by the presence of fuel stains around a fuel nozzle?
What would be most useful for locating and troubleshooting an internal fuel leak in an aircraft fuel system?
What would be most useful for locating and troubleshooting an internal fuel leak in an aircraft fuel system?
What type of fire-extinguishing agent is suitable for an aircraft brake fire?
What type of fire-extinguishing agent is suitable for an aircraft brake fire?
What triggers the thermocouple fire-warning system?
What triggers the thermocouple fire-warning system?
What is the purpose of a carbon monoxide detector in an aircraft?
What is the purpose of a carbon monoxide detector in an aircraft?
What happens when portable carbon monoxide detectors detect carbon monoxide?
What happens when portable carbon monoxide detectors detect carbon monoxide?
What types of devices are used in fire-detection systems?
What types of devices are used in fire-detection systems?
What is a consequence of intentionally discharging a fire-extinguishing system?
What is a consequence of intentionally discharging a fire-extinguishing system?
What is a consideration when maintaining fire-detection systems?
What is a consideration when maintaining fire-detection systems?
What is the temperature range for a fire-extinguishing agent storage container with a pressure of 330 psig?
What is the temperature range for a fire-extinguishing agent storage container with a pressure of 330 psig?
What is the barometric altimeter indicating when the barometric scale is set at 29.92 "Hg?
What is the barometric altimeter indicating when the barometric scale is set at 29.92 "Hg?
What type of mechanism would be found in a hydraulic pressure gauge?
What type of mechanism would be found in a hydraulic pressure gauge?
What is the maximum altitude loss permitted during an unpressurized aircraft instrument static pressure system integrity check?
What is the maximum altitude loss permitted during an unpressurized aircraft instrument static pressure system integrity check?
What should be considered when selecting hardware for attaching bonding connections to an aircraft structure?
What should be considered when selecting hardware for attaching bonding connections to an aircraft structure?
What type of pressure is used during the static system leakage check required by 14 CFR 91.411?
What type of pressure is used during the static system leakage check required by 14 CFR 91.411?
What does a turn coordinator instrument indicate?
What does a turn coordinator instrument indicate?
What is the fixed line mark attached to the compass bowl of a magnetic compass called?
What is the fixed line mark attached to the compass bowl of a magnetic compass called?
What is the basis of the operation of an angle of attack indicating system?
What is the basis of the operation of an angle of attack indicating system?
What method is used to check for internal leakage of a fuel valve without removing it from the aircraft?
What method is used to check for internal leakage of a fuel valve without removing it from the aircraft?
What is the primary reason for locating the main fuel strainer at the lowest point in the fuel system?
What is the primary reason for locating the main fuel strainer at the lowest point in the fuel system?
What is the purpose of bonding and grounding fuel system components?
What is the purpose of bonding and grounding fuel system components?
What type of fuel quantity indicating system allows the indicator to be located any distance from the tank(s)?
What type of fuel quantity indicating system allows the indicator to be located any distance from the tank(s)?
What unit is generally used to actuate the fuel pressure warning system?
What unit is generally used to actuate the fuel pressure warning system?
What occurs when a visual smoke detector is activated?
What occurs when a visual smoke detector is activated?
Under what condition can a carbon dioxide (CO2) hand-held fire extinguisher be used on an electrical fire?
Under what condition can a carbon dioxide (CO2) hand-held fire extinguisher be used on an electrical fire?
What type of smoke detectors use a measurement of light transmissibility in the air?
What type of smoke detectors use a measurement of light transmissibility in the air?
How can you determine the charge of a fire extinguisher container?
How can you determine the charge of a fire extinguisher container?
What is typically used to charge built-in aircraft fire-extinguishing systems?
What is typically used to charge built-in aircraft fire-extinguishing systems?
Which instrument is commonly used to detect smoke in the cargo and/or baggage compartment of an aircraft?
Which instrument is commonly used to detect smoke in the cargo and/or baggage compartment of an aircraft?
What method is used to detect the thermal discharge of a built-in fire-extinguishing system?
What method is used to detect the thermal discharge of a built-in fire-extinguishing system?
How are thermal switches wired in fire-detection systems with a single indicator light?
How are thermal switches wired in fire-detection systems with a single indicator light?
What should be done if the pressure of a fire extinguisher container is not between minimum and maximum limits?
What should be done if the pressure of a fire extinguisher container is not between minimum and maximum limits?
What is a squib, as used in a fire-protection system?
What is a squib, as used in a fire-protection system?
What should be done during removal or installation of discharge cartridges in aircraft fire-extinguishing systems?
What should be done during removal or installation of discharge cartridges in aircraft fire-extinguishing systems?
Study Notes
Aviation Instruments and Systems
- A barometric altimeter indicates pressure altitude when the barometric scale is set at 29.92 "Hg.
- A hydraulic pressure gauge uses a Bourdon tube mechanism.
- During an unpressurized aircraft instrument static pressure system integrity check, a maximum altitude loss of 100 feet in 1 minute is permitted.
Aircraft Fuel Systems
- Fuel quantity is more accurately measured in pounds instead of gallons because fuel volume varies with temperature changes.
- When moving the mixture control on a normally operating engine into the idle cutoff position, engine RPM should slightly decrease and then drop rapidly.
- In a fuel system, valves located downstream of boost pumps should be checked with the pumps operating.
- Integral fuel tanks on transport aircraft are supported by the aircraft structure.
- A normal fuel crossfeed system operation in multiengine aircraft provides a means to maintain a balanced fuel load condition.
- The presence of fuel stains around a fuel nozzle indicates excessive airflow across the venturi.
- To locate and troubleshoot an internal fuel leak in an aircraft fuel system, maintenance manual diagrams and descriptions are most useful.
Fire Detection and Extinguishing Systems
- Fuel system components must be bonded and grounded to drain off static charges.
- Electrical and electronic fuel quantity indicating systems have the advantage of being able to locate the indicator at any distance from the tank(s).
- A pressure-sensitive mechanism is generally used to actuate the fuel pressure warning system.
- When a visual smoke detector is activated, a lamp within the indicator illuminates automatically.
- Carbon dioxide (CO2) hand-held fire extinguisher may be used on an electrical fire if the horn is nonmetallic.
- Smoke detectors that use a measurement of light transmissibility in the air are called photoelectrical devices.
- In some fire-extinguishing systems, evidence that the system has been intentionally discharged is indicated by the absence of a red disk on the side of the fuselage.
- The proper fire-extinguishing agent to use on an aircraft brake fire is dry powder chemical.
- The thermocouple fire-warning system is activated by a certain temperature.
- Carbon monoxide detectors containing yellow silica gel will turn red when air samples contain carbon monoxide.
- Built-in aircraft fire-extinguishing systems are ordinarily charged with carbon dioxide and nitrogen.
- Smoke in the cargo and/or baggage compartment of an aircraft is commonly detected by a photoelectric cell.
- A discoloring of the yellow plastic disk in the thermal discharge line is used to detect the thermal discharge of a built-in fire-extinguisher system.
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