Exercise: Exam Question Papers

Questions for: Exam Question Papers

On which bands, do the optical fibers operate?
  1. Ultra violet band
  2. Ultra high frequency band
  3. Visible light band
  4. Infrared band
Select the correct answer from the codes given below:
A:
1 only
B:
1 and 2 only
C:
1, 2 and only
D:
1, 3 and 4
Answer: D
No answer description is available. Let's discuss.
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Transfer function of a certain system is:

The approximate 2% settling time for unit step input is
A:
2 sec
B:
4 sec
C:
6 sec
D:
8 sec
Answer: B

Pole '-120' will have no effect on settling time.

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What are the minimum number of 2 to 1 multiplexers required to generate a 2 input AND gate a 2 input Ex-OR gate?
A:
1 and 2
B:
1 and 3
C:
1 and 1
D:
2 and 2
Answer: A
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Consider the following statements regarding sources or error in a Q-meter:
  1. If a coil with resistance R is connected in direct measurement mode and if the residual resistance of Q-meter is 0.1 R, then the measure Q of the coil would be 1.1 times the actual Q.
  2. If the inductance to be measured is less than 0.1 mH, the error due to presence of residual inductance cannot be neglected.
  3. The presence of distributed capacitance in a coil modifies the effective Q of the coil.
Which of the above statements are correct?
A:
1, 2 and 3
B:
1 and 2 only
C:
2 and 3 only
D:
1 and 3 only
Answer: C
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The following components are used to measure power output of a 2 kW TWT amplifier:
  1. TWTA
  2. Low pass/high pass filter
  3. 20 dB attenuator
  4. 40 dB directional complex with matched load
  5. Power load
What is the correct sequence of connection of these components?
A:
2 - 4 - 1 - 3 - 5
B:
1 - 3 - 4 - 2 - 5
C:
1 - 2 - 4 - 3 - 5
D:
2 - 4 - 1 - 5 - 3
Answer: B
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