A radio link has 15 W transmitter connected to an antenna of 2.5 m2 effective aperture at 5 GHz. The receiving antenna has an effective aperture of 0.5 m2 and is located at a 15 Km line of sight distance from transmitting antenna. Assuming lossless, matched antennas, the power delivered to the receiver is:

The following readings were obtained during differential levelling. Reduced Level (RL) of point A is 240,000 m. The fore sight and back sight between points A and TPI is 1.420 m and 2.024 m, respectively. Fore sight and back sight between points TPI and TP2 is 2.100 m and 1.986 m, respectively. The back sight from B is 1.722 m. These are marked on the given figure. What is the RL at turning point - 2 (TP2)? All values are in metres.

A

242.024 m

B

241.202 m

C

240.604 m

D

240.490 m

Consider the following three statements about link state and distance vector routing protocols, for a large network with 500 network nodes and 4000 links. [S1] The computational overhead in link state protocols is higher than in distance vector protocols. [S2] A distance vector protocol (with split horizon) avoids persistent routing loops, but not a link state protocol. [S3] After a topology change, a link state protocol will converge faster than a distance vector protocol. Which one of the following is correct about S1, S2, and S3?

A

S1, S2, and S3 are all true.

B

S1, S2, and S3 are all false

C

S1 and S2 are true, but S3 is false.

D

S1 and S3 are true, but S2 is false

Which of the following antennas are used directly as radiators abroad satellites to illuminate comparatively large areas of the Earth and they are widely used as primary feeds for reflector-type antennas both in transmitting and receiving modes ?

A

Dipole antennas

B

End fire-array antennas

C

Microstrip antennas

D

Horn antennas

The ratio between transmitter chip clock rate and the difference between the transmitter chip clock and difference between transmitter and receiver chip clock rates is called ___________

A

Slide factor

B

Chip factor

C

Reuse factor

D

Shape factor

For a given road, safe stopping sight distance is 80 m and passing sight distance is 300 m. What is the intermediate sight distance?

A

220 m

B

190 m

C

160 m

D

150 m

If the observed back sight and fore sight are x1 and x2. The correction back sight on A will be equal to x1-y1, where y1= D1 tan i°. The correct fore sight on B will be equal to x2-y2 where, y2 = D2 tan i°. Then what is the correction difference in level between A and B.

A

x1 – x2

B

x2 – x1

C

x1 – x2 + (D2 tan i° – D1 tan i°)

D

x2 – x1 + (D1tan i° + D2 tan i°)

If the observed back sight and fore sight are x1 and x2. The correction back sight on A will be equal to x1-y1, where y1= D1 tan i°. The correct fore sight on B will be equal to x2-y2 where, y2 = D2 tan i°. Then what is the correction difference in level between A and B, if D1 = D2?

A

x1 – x2

B

x2 + x1

C

x1 – x2 + (D2 tan i° – D1 tan i°)

D

x2 – x1 + (D1tan i° + D2 tan i°)

If the observed back sight and fore sight are 20 m and 18 m. The correction back sight on A will be equal to 16 m, The correct fore sight on B will be equal to 14 m where then what is the correction difference in level between A and B?

A

4 m

B

3 m

C

2 m

D

6 m

If physical aperture of antenna is 0.02m2 and aperture efficiency is 0.5, then what is the value of effective aperture?

A

0.0004m2

B

0.001m2

C

0.01m2

D

25m2

If the field strength at receiving antenna is 1 µV/m, and the effective aperture area is 0.4 m2 and the intrinsic impedance of the medium is 377 Ω, then the power received by the antenna is:

A

1.06 pW

B

1.06 fW

C

2 µW

D

None of the mentioned

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