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Question 47-1 : In an electrical circuit, the function of a breaker is to ? [ Understand operation ]
Protect the system in the event of overload.
A fuse is a deliberately weak part of a circuit that is designed to fail if a problems occurs. current limiters are like fuses, but with a much higher melting point so that a higher overload current can be carried they allow a short term overload. they will limit the current to a predetermined value and are used for heavy duty circuits.
Question 47-2 : With regards to launcher / catapult safety areas, the operator must refer to the ?
Manufacturer's operating manual.
Question 47-3 : During your pre flight inspection, you discover a small nick in the casing of your small remotely piloted aircraft system battery. what action should you take ?
Follow the manufacturer's guidance.
Question 47-4 : From the statements below, choose the one most likely to cause a speeding error during a flight. ?
The anemometer is exposed to a swarm of flying insects.
The anemometer airspeed indicator is a sensitive, differential pressure gauge which measures and promptly indicates the difference between pitot impact/dynamic pressure and static pressure. these two pressures are equal when the aircraft is parked on the ground in calm air. when the aircraft moves through the air, the pressure on the pitot line becomes greater than the pressure in the static lines. the pitot system can become blocked completely by insects or ice and ram air is no longer able to enter the pitot system. note that the pitot tube is generally heated, to avoid ice formation, and that for ice to form, a negative temperature and humidity are required, which is why the answer a very cold outside temperature 40°c is not right. it can be very cold but no ice will form.
Question 47-5 : Electrical conductivity is ?
The ability of a material to carry the flow of an electric current
Electrical conductivity is the reciprocal of resistance or ohm.
Question 47-6 : Electrical power is expressed in ?
Watt.
Watt unit of power the watt is the power which in one second gives rise to energy of 1 joule..watt is the product of amps x volts
Question 47-7 : From the choices below, specify the minimum operating voltage of a lipo battery for small remotely piloted aircraft. ?
3.7 volts.
We are talking about the minimum operating voltage..below 3.7 volts, it's lifetime will be drastically reduced the cell will almost certainly be damaged and will become unstable which can be very dangerous..it is unsafe to discharge a lipo below its minimum operating voltage.
Question 47-8 : The embedded microprogram in an electronic system of a remotely piloted aircraft, but also in its radio control unit ground station , and possibly in some batteries, is called ?
Firmware.
Question 47-9 : From the following choices, identify the element that will not affect compass accuracy. ?
The outside temperature.
One of the oldest and simplest instruments for indicating direction is the magnetic compass..the magnetic compass is subject to a number of errors that must be considered..the magnets in a compass align with any magnetic field. local magnetic fields in a drone caused by electrical current flowing in the structure, in nearby wiring or any magnetized part of the structure, conflict with the earth's magnetic field and cause a compass error called deviation..batteries, engines and esc produce magnetic fields that can disturb compass indication.
Question 47-10 : From the choices below, specify the role of the electronic speed controller esc. ?
It controls the speed of rotation of the motors.
The role of an esc is to receive information from the flight controller and, when in operation, to run the engines more or less quickly.. 119
Question 47-11 : Current small rpa's operating within line of sight, generally use the following frequency for flight control... ?
2.4 ghz.
2.4 ghz for flight control...5.8 ghz for camera systems.
Question 47-12 : Indicate the statement that describes the behavior of an octocopter 8 engines , when one of the engines breaks down. ?
The aircraft normally responds to pilot commands.
An octocopter will normally responds to pilot commands in case of one engine failure. but the drone might not be able to come back to its point of departure for example if it must gain altitude to come back. the statement descends into control and lands normally without pilot intervention , in fact, is the area is not safe below the rpas, it will not land normally...
Question 47-13 : Specify the generally recommended minimum level of battery charge to perform a firmware update on an rpa. ?
80 %.
It is recommended to have a minimum level of 50% for a mavic pro for example...here, the writer is waiting for a logical answer. he asks for the minimum level recommended...the best is to have a full battery 100% , but 80% at least seems to be the best answer.
Question 47-14 : Maintenance and record keeping. servicing operations ?
Are to be performed on the entire aircraft and its accessories.
Question 47-15 : Which item is not a requirement for technical recort keeping with regards to a small rpa ?
The cumulative total of air time.
901.48 records 1 every owner of a remotely piloted aircraft system shall keep the following records. a a record containing the names of the pilots and other crew members who are involved in each flight and, in respect of the system, the time of each flight or series of flights and. b a record containing the particulars of any mandatory action and any other maintenance action, modification or repair performed on the system, including i the names of the persons who performed them, ii the dates they were undertaken, iii in the case of a modification, the manufacturer, model and a description of the part or equipment installed to modify the system, and iv if applicable, any instructions provided to complete the work.. 2 every owner of a remotely piloted aircraft system shall ensure that the records referred to in subsection 1 are made available to the minister on request and are retained for a period of. a in the case of the records referred to in paragraph 1 a , 12 months after the day on which they are created and b in the case of the records referred to in paragraph 1 b , 24 months after the day on which they are created.. 3 every owner of a remotely piloted aircraft system who transfers ownership of the system to another person shall, at the time of transfer, also deliver to that person all of the records referred to in paragraph 1 b.
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