Category Archives: EC Engineering mcqs

MCQ in Telecommunication

MCQ in Telecommunication

Q1.    Mark Cross against the correct answer:

1. Type of modulation used in visual section of a transmitter.
  1. Positive A.M.
  2. Negative A.M.
  3. F.M.
  4. None of the above.
2. The Difference between video I.F. & audio I. F in TV transmitter is
  1. 4.43 MHz
  2. 3.50 MHz
  3. 5.50 MHz
  4. None of the above.

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Mcqs in Wave propagation

Mcqs in Wave propagation

  1. A 'skip zone' is:

    1. the distance between the antenna and where the refracted wave first returns to earth
    2. the distance between the far end of the ground wave and where the refracted wave first returns to earth
    3. the distance between any two refracted waves
    4. a zone caused by lost sky waves
  2. The medium which reflects high frequency radio waves back to the earth's surface is called the:

    1. biosphere
    2. stratosphere
    3. ionosphere
    4. troposphere
  3. The highest frequency that will be reflected back to the earth at any given time is known as the:

    1. UHF
    2. MUF
    3. OWF
    4. LUF Continue reading Mcqs in Wave propagation

MCQs in Radio Engineering Part -1

MCQs in Radio Engineering (Electronics and Communication EngineeringTest Paper

Choose the correct answer

1. Output power of 10 kW FM transmitter modulated with 1 Khz sinusoidal tone with deviation of + 75 kHz shall be

  • 10 kW
  • 15 kW
  • 7.5 kW

2. Adaptive pre-emphasis in FM limiter is

  • Independent of frequency.
  • Dependent on frequency.
  • Independent of level.
  • Dependent on level.

3. The feeder used to connect the FM Transmitter to the antenna is

Broadcast Engineering Short Answers 1

Electronics and Communication Engineering Short answers

(Broadcast Engineering)

  • The repealer electrode in a reflex  is at                         potential.
  • The junction capacitance of a diode is made up of  a                       
  • The ripple frequency of a 50 Hz, 3 phase full wave rectifier is                       Hz.
  • Main advantage of grounded grid amplifier is                       
  • In a push pull amplifier                        harmonic are absent.
  • If two amplifiers of gain 10 are cascaded, the overall gain will be                
  • A rejector circuit offers                         reactance above resonance.
  • The filter used in the first stage of AF chain is usually                          pass.
  • The crystal of an oscillator is placed in order to                    
  • In a 10KW transmitter if the modulation index is 0.5, the total side band power is                
  • The detector used in an FM receiver is                     
  • The digital gate used for the logic "This or that but not both" is                     
  • ROM is a                      memory in terms of relativity.
  • A negative logic means                     
  • If a 20 kHz audio is to be sampled in A/D convertor, the minimum sampling frequency shall be                 for faith full reproduction.
  • The most common modulation scheme used in a digital satellite communication system is                       
  • In a computer hardware BIOS stands for                 
  • A spectrum analyzer is a                     domain equipment.
  • A geo-stationary orbit is approximately at                   km height.

EC Engineering MCQs Paper 2

EC Engineering MCQs​

Electronics and Communication Engineering  Test Paper

Choose the correct answer

1. The output power of an audio power amplifier is 12 W, which is approximately

a) 20 dBm                   b) 41 dBm                   c) 62 dBm                   d) 86 dBm

2. The bandwidth of a wide-band amplifier to reproduce a pulse faithfully depends on

a) Width of the pulse                                       b) Rise time of the pulse        
c) Frequency of the pulse                               d) All of these

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MCQs in Radio Engineering Part – 2

MCQs in Radio Engineering Part – 2   (Electronics and Communication Engineering) Test Paper

Choose the correct answer

1. Medium wave broadcast band is from

a)         530 kHz to 1600 kHz             
b)         3 MHz to 10 MHz
c)         10 MHz to 30 MHz

Continue reading MCQs in Radio Engineering Part – 2