Mod 5-6-7-8 Flashcards
What is measured by an aircraft barometric altimeter in order to provide the aircraft altitude?
Static air pressure
Why does the pilot have to adjust the altimeter barometric setting?
To correct for changes in atmospheric conditions
Which instruments are connected to the aircraft static system?
Barometric altimeter, airspeed indicator and vertical speed indicator
In flight, at altitudes above 18 000 feet, what altimeter barometric setting is used?
29.92 IN-HG (inches of mercury)
When performing a static system ‘leak test’ on a pressurized aircraft with a maximum cabin differential pressure of 20 000 feet, what is the maximum allowable leak rate, according to the Canadian Aviation Regulations (CARs)?
400 feet per minute
When performing a static system ‘leak test’ on an un-pressurized aircraft, at what altitude is the leak test performed?
1000 feet above the ambient aircraft altitude
What altitude is indicated by the altimeter shown in Figure 1?
3630 feet
When testing the static system of the aircraft associated with the instruments in Figure 2, what would be the best rate of climb and descent to use?
1000 feet per minute
Which instruments in Figure 2 are connected into the aircraft static system?
A, D and E
Which instrument in the photo below is connected into the aircraft pitot system?
A
Which section (identified in red) of the Audio Control Panel (ACP) in Figure 1 is used to select the radio that will be used for transmitting?
A
In an aircraft audio system, what does the ‘PTT’ switch do when it is activated (pressed)?
Switches the radio from receive mode to transmit mode
When the switch in section ‘D’ of the audio control panel (ACP) is selected (pushed in), all of the selected receivers’ audio will be heard over the speaker.
true or false
true
More than one switch in section ‘C’ of the audio control panel (ACP) in Figure 1 may be selected at the same time. (1 mark each)
true or false
true
More than one switch in section ‘A’ of the audio control panel (ACP) in Figure 1 may be selected at the same time. (1 mark each)
true or false
false
Which statement below best describes the function of the push-button switch identified as letter ‘B’ in Figure 1?
Allows the pilot to hear both ‘COM’ radios 1 and 2 at the same time
Which letters identify the ‘barrel’ parts of the two plugs?
A and E
Which letter in Figure 2 indicates the contact for the ‘Phones Hi’ function?
D
The letters in Figure 2 identify contacts on the mic and phone plugs. Which letter indicates the contact for the ‘PTT’ function?
C
Which of the following best describes the ‘phase relationship’ between the input and output signals for the configuration of transistor amplifer shown in Figure 1?
The input and the output signal are 180º out of phase with each other
What configuration of amplifier is shown in Figure 1?
Common Emitter Amplifier
Refer to Figure 2. What best describes the characteristics of an amplifier circuit which will provide ‘maximum power transfer?’
The value of the output impedance (ZOut) must be equal to the value of the load resistance (RLoad)
What best describes an oscillator circuit?
Produces an AC voltage output with only a DC input
What best describes ‘Frequency Modulation’ (FM)?
The frequency of the composite signal changes in proportion to the amplitude of the modulating signal
What is shown in Figure 3?
An overmodulated AM waveform
Which of the following is NOT a function of a radio transmitter?
1) To radiate the modulated RF signal into the atmosphere
2) To generate an RF carrier wave
3) To remove the modulating signal from the carrier wave
4) To modulate the RF signal with an information signal
To remove the modulating signal from the carrier wave
What type of radio receiver is shown in Figure 4?
Super-heterodyne Receiver
Refer to Figure 4. Type in the letter that identifies the correct component
D-C-B-H
Local Oscillator = D
Mixer =C
RF Amplifier =B
Speaker =H
Refer to Figure 4. Type in the letter that identifies the correct component
G-A-F-E
AF Amplifier = G
Antenna =A
Detector =F
IF Amplifier =E
Radio waves in the frequency range below 3 MHz propagate using which of the following methods?
Ground/Surface Wave
What radio frequency band does 2.75 MHz belong to?
The MF Band
What is the range of frequencies that corresponds to the VHF radio band?
30 MHz to 300 MHz
describe the relationship of the three properties of a Transverse Electromagnetic (TEM) Wave
The ‘E’ field, the ‘H’ field and the direction of propagation are all perpendicular to each other
Calculate the wavelength in meters for a radio signal at 12.75 MHz.
23.5294
Refer to the photograph of the aircraft antenna in Figure 1. What is the polarization of the antenna shown in this photograph?
Horizontally polarized
In an aircraft with aluminum structure, the skin of the aircraft will act as the ground plane.
true or false
true
The purpose of an antenna ‘doubler’ is to provide increased structural strength for the mounting area.
true or false
true
The antenna ‘doubler’ in a composite structure aircraft can provide the ground plane as well as increasing the structural strength of the antenna mounting area.
true or false
true
What is the standard antenna system impedance for avionics systems?
50 Ω
Which items in Figure 2 are conductors?
B and D
What is the purpose of a diplexer in an aircraft antenna system?
It divides the signal from one antenna system to feed multiple receivers
Which of the following best describes the operation of an aircraft static discharger?
Allows high voltage static to discharge at low current
Which numbered item in Figure 1 is used for attitude indication?
item 9
What would the voltmeter in the circuit of Figure 2 read?
+3.55 V
Which type of electrical temperature measuring system uses two dissimilar conductors which produce a small voltage when temperature changes?
Thermocouple system
What is the name of the instrument shown in Figure 3?
A PFD
