Consider the following statements about radar Beacon It is also called transpond

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Question
Consider the following statements about radar Beacon
1. It is also called transponder.
2. It includes pulse transmitter, receiver and antenna.
3. It replies with full power even when the signal receives is weak.
Which of the above statements are correct?
Options
A. All
B. 1 and 2 only
C. 2 and 3 only
D. 2 only

Correct Answer

All

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5. When duct propagation exists
Options
A. the line of sight and diffraction. Zone concepts are payable
B. the line of sight and diffraction zone concepts are not applicable
C. line of sight concept is applicable but diffraction zone concept is applicable
D. diffraction zone concept is not applicable but line of sight concept is not applicable

7. The usable bandwidth of ridge wave guide
Options
A. is lower than that of rectangular waveguide
B. is higher than that of rectangular waveguide
C. is almost same as that of rectangular waveguide
D. is very small as compared to that of rectangular waveguide

8. A short circuited stub is preferred to an open circuited stub because an open circuited stub
Options
A. is more difficult to fabricate and construct
B. is made of transmission line of different Z₀
C. is liable to radiate
D. is incapable of giving full range of reactance

9. A square waveguide carries TE₁₁ mode whose axial magnetic field is given by H_z = H₀ , where the guide dimensions are in cms. The cut off frequency of the mode is
Options
A. 5 GHz
B. 7.5 GHz
C. 6.5 GHz
D. 8 GHz

10. If air pressure in a rectangular waveguide is increased the maximum power handling capacity
Options
A. is decreased
B. is increased
C. remains the same
D. may increase or decrease depending on pressure

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