logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electronics and Communication Engineering ‣ Microwave Communication See What Others Are Saying!
  • Question

  • Consider the following statements about instrument landing system of aircraft

    1. It ensures correct landing under conditions of low visibility.
    2. It consists of runaway localizer, glide path equipment and marker beacons.
    3. It is basically a blind landing system.
    Which of above statements are correct?


  • Options
  • A. All
  • B. 1 and 2 only
  • C. 1 and 3 only
  • D. 2 only

  • Correct Answer
  • All 

    • More questions

    • 1. Which of the following circuit cannot be used to demodulate SSB?

    • Options
    • A. Phase discriminator
    • B. Produce detector
    • C. Balanced modulator
    • D. Beat frequency oscillator
      • Discuss
    • 2. Negative feedback reduces noise originating at the amplifier input.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. Assertion (A): The surge current which an SCR can withstand is much higher than rms on state current.

      Reason (R): The duration of surge current is very small.


    • Options
    • A. Both A and R are correct and R is correct explanation of A
    • B. Both A and R correct but R is not correct explanation of A
    • C. A is correct but R is wrong
    • D. A is wrong but R is correct
      • Discuss
    • 4. Match the following:

      List I List II
      A. Zener diode 1. used in seven segment display
      B. Tunnel diode 2. used in voltage regulator circuits
      C. LED 3. used is solar energy utilization
      D. Photovoltaic cell 4. used in digital circuits


    • Options
    • A. A-1, B-3, C-2, D-4
    • B. A-2, B-3, C-1, D-4
    • C. A-2, B-4, C-1, D-3
    • D. A-3, B-2, C-4, D-1
      • Discuss
    • 5. For the system in the given figure the characteristic equation is

    • Options
    • A.
    • B.
    • C. K(s + 1)(s + 3) = 0
    • D. s(s + 2) = 0
      • Discuss
    • 6. The magnitudes of OC and SC input impedances of a transmission line an 100 ? and 25 ?. The characteristic impedance is

    • Options
    • A. 25 ?
    • B. 50 ?
    • C. 75 ?
    • D. 100 ?
      • Discuss
    • 7. In the given figure x6 =

    • Options
    • A. de(ax1 + bx2 + cx3)
    • B. (a + b + c) (x1 + x2 + x3) (d + e)
    • C. (ax1 + bx2 + cx3) (d + e)
    • D. a b c d e (x1 + x2 + x3)
      • Discuss
    • 8. Which of the following cannot be used to demodulate SSB?

    • Options
    • A. Complete phase-shift generator
    • B. Product detector
    • C. Diode balanced modulator
    • D. Bipolar transistor balanced modulator
      • Discuss
    • 9. The current wave shape shown in figure (1) is applied to a circuit element. The voltage across the element is shown in figure (2). The element is

    • Options
    • A. R
    • B. L
    • C. C
    • D. Semiconductor
      • Discuss
    • 10. When phase-lag compensation is used in a system, then gain cross over frequency, bandwidth and undamped frequency are respectively

    • Options
    • A. Increased, Increased, Increased
    • B. Increased, Increased, Decreased
    • C. Increased, Decreased, Decreased
    • D. Decreased, Decreased, Decreased
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.