HF MCQ

Test your knowledge with important HF MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more HF MCQs at Bissoy

• HF radio waves can travel beyond the horizon.
  ক

  False

  খ

  True
• The MUF is lowest when the waves are directed ___________
  ক

  Straight downwards

  খ

  Straight upwards

  গ

  Diagonally

  ঘ

  Incidentally
• Which of the following is referred to as the upper section of HF?
  ক

  26.5 MHz to 30 MHz

  খ

  26.5 Hz to 30 Hz

  গ

  265 MHz to 300 MHz

  ঘ

  265 Hz to 300 Hz
• What is the full form of RFID?
  ক

  Real frequency identification

  খ

  Radar frequency identification

  গ

  Radio frequency identification

  ঘ

  Rate frequency identification
• On a day in full summer the __________ tend to be more usable.
  ক

  Ultra low frequencies

  খ

  Medium frequencies

  গ

  Lower frequencies

  ঘ

  Higher frequencies
• In aviation, HF communication systems are required for all trans-oceanic flights.
  ক

  False

  খ

  True
• The lowest usable frequency depends on the absorption of which of the following layers?
  ক

  D-layer

  খ

  E-layer

  গ

  F-layer

  ঘ

  G-layer
• What is the full form of FOT?
  ক

  Frequency of open transmission

  খ

  Frequency of optimum transmission

  গ

  Frequency of optical transmission

  ঘ

  Frequency of optional transmission
• What is the frequency range of HF (High frequency)?
  ক

  3 MHz to 30 MHz

  খ

  3 Hz to 30 Hz

  গ

  3 KHz to 30 KHz

  ঘ

  3 mHz to 30 mHz
• Frequencies immediately below HF are referred to as _______
  ক

  Medium frequency

  খ

  Ultra high frequency

  গ

  Low frequency

  ঘ

  Ultra low frequency
• What is the wavelength range of HF?
  ক

  100km to 10km

  খ

  1000m to 100m

  গ

  1000km to 100km

  ঘ

  100m to 10m
• Communication at high frequencies is often called as ____________
  ক

  Longwave radio

  খ

  Ultra shortwave radio

  গ

  Shortwave radio

  ঘ

  Mediumwave radio
• The High frequency band is also known as ___________
  ক

  Pentameter band

  খ

  Decameter band

  গ

  Quadmeter band

  ঘ

  Hexameter band
• Which of the following is not a factor influencing HF propagation?
  ক

  Wind speed

  খ

  Season

  গ

  Solar activity

  ঘ

  Sunspot cycle
• What is the full form of MUF?
  ক

  Most usable frequency

  খ

  Minimum usable frequency

  গ

  Maximum usable frequency

  ঘ

  Minimal usable frequency