Description : In what range of frequencies are most omnidirectional horizontally polarized antennas used? A. VHF, UHF B. VLF, LF C. SH, EHF D. MF, HF
Last Answer : A. VHF, UHF
Description : In what frequency band is the ATIS normally broadcasted? a. LF b. HF c. ADF d. VHF
Last Answer : d. VHF
Description : Which frequency band is the standard AM radio broadcast? A. HF B. UHF C. MF D. VHF
Last Answer : C. MF
Description : Where does the AM broadcast band located in the spectrum band? A. HF band B. VHF band C. LF band D. MF band
Last Answer : D. MF band
Description : The frequency band of the ILS glidepath is: a. UHF b. VHF c. SHF d. VLF
Last Answer : a. UHF
Description : What frequency band is referred to as the metric waves? A. VHF B. UHF C. HF D. SHF
Last Answer : A. VHF
Description : Which frequency bands can be refracted during the day by the D layer? A. VLF B. MF C. LF D. Both VLF and LF
Last Answer : D. Both VLF and LF
Description : What is required for navigation in IMC? a. Radio equipment and equipment for guidance until visual point b. Anti-icing equipment c. A serviceable weather radar d. One VHF box and one HF box
Last Answer : a. Radio equipment and equipment for guidance until visual point
Description : What is the channel spacing for MF-HF voice frequencies? A. 2.8 kHz B. 500 Hz C. 3.5 kHz D. 3 kHz
Last Answer : D. 3 kHz
Description : Tropospheric scatteris usedwith frequenciesinthe followingrange: a. HF b. VHF c. UHF d. VLF
Last Answer : c. UHF
Description : What range of frequencies are usually referred to as the Ultra High Frequency (UHF) Band? w) 3 to 30 Mega Hertz x) 30 to 300 Mega Hertz y) 300 to 3,000 Mega Hertz z) 30,000 to 300,000 Mega Hertz
Last Answer : ANSWER: Y -- 300 to 3,000 MEGA HERTZ
Description : A transmitted signal 5 meters in wavelength is received by an antenna coil having a 50-Ω resistance and a 0.01 H inductance. What is the capacitance of the tuner shunting the antenna coil at this point? A. 0.704 fF B. 0.704 μF C. 0.704 nF D. 0.704 mF
Last Answer : A. 0.704 fF
Description : Why does the Navy only use the upper and lower ends of the mf band?
Last Answer : Due to the commercial broadcast (AM) band.
Description : In the event of an act of unlawful interference, which of the following is the correct procedure to be taken by the pilot in command? a. Squawk 7700 if the situation requires and continue ... the flight plan, climb or descend to altitudes that differ from the normal cruising altitudes by 1000ft
Last Answer : c. Squawk 7500 (or 7700 if required) and broadcast a warning if the situation forces deviation from the cleared flight plan
Description : The DME counters are rotating continuously. This indicates that: a. The DME is unserviceable b. The DME is trying to lock onto range c. The DME is trying to lock onto frequency d. The DME is receiving no response from the ground station
Last Answer : b. The DME is trying to lock onto range
Description : DME and VOR are “frequency paired” because: a. The same receiver can be used for both aids b. The VOR transmitter is easily converted to the required DME frequency c. Cockpit workload is reduced d. Both ground transmitter aerials can be placed on the same site if required
Last Answer : c. Cockpit workload is reduced
Description : A typical DME frequency is: a. 1000 MHz b. 1300 MHz c. 1000 kHz d. 1575 MHz
Last Answer : a. 1000 MHz
Description : The correct readback of the frequency 123.725 on 25 kHz spacing is: a. 123.725 b. 123.7 c. 12372 d. 123.72
Last Answer : a. 123.725
Description : The minimum content of a readback of the message from ATC “X-CD CHANGE FREQUENCY TO STEPHENVILLE TOWER 118.7” is: a. 118.7 b. CHANGING FREQUENCY X-CD c. TO STEPHENVILLE X-CD d. 118.7 X-CD
Last Answer : d. 118.7 X-CD
Description : If you are unable to contact a station on a designated frequency you should: a. Try another appropriate frequency b. Start transmitting blind c. Land at the nearest suitable aerodrome d. Transmit words twice
Last Answer : a. Try another appropriate frequency
Description : When reporting a frequency the use of the word “DECIMAL” can be omitted: a. When there is no likelihood of confusion b. After the initial call c. Never d. By the ground station only
Last Answer : c. Never
Description : The frequency on which ATIS can be found is: a. Discrete VHF or VOR frequency b. Discrete VHF only c. VOR frequency only d. Any ATC frequency
Last Answer : a. Discrete VHF or VOR frequency
Description : The ATC message “DISTRESS TRAFFIC ENDED” signifies that: a. All traffic are to end their transmissions b. All aircraft on the frequency are to change to another frequency c. Normal ATC is resumed after an emergency d. ATC is shutting shop
Last Answer : c. Normal ATC is resumed after an emergency
Description : The definition of the instruction “MONITORO” is: a. Listen out on frequency b. Establish communications on frequency c. Watch out for visual signals on frequency d. You are being watched
Last Answer : a. Listen out on frequency
Description : Which band does channel 14 of the television channel belong? A. High VHF band B. EHF band C. UHF band D. Low VHF band
Last Answer : C. UHF band
Description : Channel 7 of the regular television channel belongs to which band? A. Low VHF band B. High VHF band C. Low UHF band D. High UHF band
Last Answer : B. High VHF band
Description : TV channels 2, 4 and 5 are known as ________. A. Mid band UHF B. Low band UHF C. High band VHF D. Low band VHF
Last Answer : D. Low band VHF
Description : Troposheric scatter uses the frequencies in the ________ band. A. VLF B. UHF C. VHF D. UF
Last Answer : B. UHF
Description : What range of frequencies are usually referred to as the UHF Band? w) 3 to 30 Megahertz x) 30 to 300 Megahertz y) 300 to 3,000 Megahertz z) 30,000 to 300,000 Megahertz
Last Answer : ANSWER: Y -- 300 TO 3,000 MEGAHERTZ
Last Answer : UHF band is given by 300 MHz to 3000 MHz.
Description : If a train crosses a tree in 24 seconds while travelling at a speed of 90km/hr, then in how much time will the train cross a telegraph post of length 1200m at same speed? A) 26 sec B) 48 sec C) 72 sec D) 38 sec
Last Answer : ANSWER:C Explanation: Speed of the train = 90 km/hr Converting the speed into m/sec 90 km/hr = (90* 5/18)m/s = 25m/s length of the train = distance travelled we know distance = speed * ... Time = distance / speed = ( 1800/25) sec = 72 seconds Hence the required answer is 72 seconds
Description : What is the usual electrical length of a driven element in an HF beam antenna? A. ¼ wavelength B. ¾ wavelength C. ½ wavelength D. 1 wavelength
Last Answer : C. ½ wavelength
Description : lf slip of an induction machine is 0.02 and the stator supply frequency is 50 Hz, what will be the frequency of the rotor induced e.m.f.? (A) 10 Hz (B) 50 Hz (C) 1 Hz (D) 2500 Hz
Last Answer : 1hz
Description : What type of transmission is radiated from an aircraft’s radio altimeter antenna? A. An amplitude modulated continuous wave B. A pulse position modulated UHF signal C. A differential phase shift keyed UHF signal D. A frequency modulated continuous wave
Last Answer : D. A frequency modulated continuous wave
Description : What connector is popular in attaching test instruments like oscilloscopes, frequency counters, spectrum analyzers, etc? A. UHF connector B. PL-259 C. BNC D. SMA
Last Answer : C. BNC
Description : Assuming a UHF frequency range of 405.0125 MHz to 405.0875 MHz at 25 kHz channeling plan, how many channels can you produce? A. 2.5 ch. B. 2 ch. C. 4 ch. D. 3 ch.
Last Answer : D. 3 ch.
Last Answer : Frequency in the UHF range propagate by means of Space waves.
Description : What are the four general types of communications services in the hf band?
Last Answer : Point-to-point, ship-to-shore, ground-to-air, and fleet broadcast.
Description : Indicate the false statement. A. HF mixer are generally noisier than HF amplifiers. B. Impulse noise voltage is dependent on bandwidth C. Thermal noise is independent of the frequency at which is measured. D. Industrial noise is usually of the impulse type.
Last Answer : B. Impulse noise voltage is dependent on bandwidth
Description : Highest frequency that can be used for skywave HF communications between two given points on earth. A. Gyro frequency B. Maximum usable frequency C. Critical frequency D. Virtual frequency
Last Answer : B. Maximum usable frequency
Description : If the weight of an aircraft is increased the maximum gliding range: a. Decreases b. Increases c. Remains the same, and rate of descent is unchanged d. Remains the same, but rate of descent increases
Last Answer : d. Remains the same, but rate of descent increases
Description : The advantage of a constant speed propeller over a fixed pitch propeller is: a. Higher maximum thrust available b. Higher maximum efficiency c. More blade surface area available d. Nearly maximum efficiency over wide speed range
Last Answer : d. Nearly maximum efficiency over wide speed range
Description : If the ailerons are deflected to 10°, compared to 5°, this will cause: a. An increased angle of bank b. An increased rate of roll c. No change to either bank angle or roll rate d. A reduction in the adverse yawing moment
Last Answer : b. An increased rate of roll
Description : If airbrakes are extended during a glide, and speed maintained, the rate of descent will: a. Increase and glide angle will be steeper b. Increase but glide angle will remain the same c. Decrease d. Remain the same
Last Answer : a. Increase and glide angle will be steeper
Description : An aircraft has a L/D ratio of 15:1 at 50kts in calm air. What would the L/D ratio be with a direct headwind of 25kts? a. 30:1 b. 15:1 c. 25:1 d. 7.5:1
Last Answer : b. 15:1
Description : What true airspeed and angle of attack should be used to generate the same amount of lift as altitude is increased? a. A higher true airspeed for any given angle of attack b. The same true ... c. A lower true airspeed and higher angle of attack d. A constant angle of attack and true airspeed
Last Answer : a. A higher true airspeed for any given angle of attack
Description : How can the pilot increase the rate of turn and decrease the radius at the same time? a. Shallow the bank and increase airspeed b. Steeper bank and increase airspeed c. Steeper bank and decrease airspeed
Last Answer : c. Steeper bank and decrease airspeed
Description : To maintain altitude, what must be done as Indicated Airspeeed (IAS) is reduced? a. Decrease angle of attack to reduce the drag b. Increase angle of attack to maintain the correct lift force c. Deploy the speed brakes to increase drag d. Reduce thrust
Last Answer : b. Increase angle of attack to maintain the correct lift force
Description : Which wind-shear condition results in a loss of airspeed? a. Decreasing headwind or tailwind b. Increasing headwind and decreasing tailwind c. Decreasing headwind and increasing tailwind d. Increasing headwind or tailwind
Last Answer : c. Decreasing headwind and increasing tailwind