1. The electromagnetic waves having frequencies from 300GHz to 400GHz are known as …….
A) Medium Waves
B) Short Waves
C) Micro Waves
D) Infrared Waves
2. The electromagnetic waves having frequencies from 3GHz to 30MHz are known as …….
A) Medium Waves
B) Short Waves
C) Micro Waves
D) Infrared Waves
3. The wavelength of the …………….. ranges from 850nm and 900nm, where the receivers with good sensitivity are available.
A) visible light
B) infrared light
C) microwaves
D) radio waves
4. The ……………….. standard developed for an infrared data link(IRDA) provides the standards for the bidirectional communications used in cordless devices such as mice, keyboards, joysticks and handheld computers.
A) IRDA-A
B) IRDA-B
C) IRDA-C
D) IRDA-D
5. The ……………….. standard developed for an infrared data link (IRDA) provides the standards for the data rates from 115Kbps to 4Mbps with a distance up to 1 meter.
A) IRDA-A
B) IRDA-B
C) IRDA-C
D) IRDA-D
6. The ………………. standard developed for an infrared data link provides the standards for the data rates of 75Kbits/sec and the distance range is up to 8 meters.
A) IRDA-A
B) IRDA-B
C) IRDA-C
D) IRDA-D
7. The disadvantage of ……………… signals is that they cannot penetrate walls or other objects and they are diluted by strong light sources.
A) infrared
B) microwave
C) radio wave
D) long-wave
8. For point to point communication in infrared system ………….. depends on the quality of emitted light, its purity, atmospheric conditions and signal obstructions.
A) Bandwidth capacity
B) Node capacity
C) Attenuation
D) EMI
9. For ……………… communication in infrared system attenuation depends on the quality of emitted light its purity and atmospheric conditions.
A) Point-to-point
B) Point-to-multipoint
C) Broadcast
D) Multi point-to-Multi point
10. State whether the following statements are correct for the applications of infrared.
i) very high data rates can be supported, due to very high bandwidth.
ii) for communication between keyboard, mouse PCs and printers
iii) For cellular communication
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii
11. Depending upon the type of application, which of the following is/are the categories of satellites.
i) Communication satellites ii) Remote sensing satellites iii) Weather satellites iv) Astrological satellites
A) i, ii and iii only
B) ii, iii and iv only
C) i, iii and iv only
D) All i, ii, iii and iv
12. Which of the following is/are the typical band of signal frequencies used for satellite communication.
i) C band ii) Ku band iii) Ka-band
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii
13. Which of the following is/are the different types of beams used to cover a specific area of the earth.
i) Global beams ii) Spot beams iii) Point-to-Point Spot iv) Use of dual-polarization
A) i, ii and iii only
B) ii, iii and iv only
C) i, ii and iv only
D) All i, ii, iii and iv
14. State whether the following statements are True or False for the characteristics of satellite microwave systems.
i) It uses a frequency range between 4 to 6 GHz
ii) It supports a bandwidth and data rate in the range of 1 to 10 Mbps.
iii) Attenuation depends on frequency, power, antenna size and atmospheric condition.
A) False, True, True
B) False, True, False
C) True, False, False
D) True, False, True
15. For ………………. frequencies, the download frequency is 4GHz and up-link frequency is 6GHz.
A) C band
B) Ku band
C) Ka band
D) Ca band
16. The frequencies having downlink frequency 11GHz and up-link frequency 14GHz is known as ……………… frequency.
A) C band
B) Ku band
C) Ka band
D) Ca band
17. For ……………. frequencies, the download frequency is 30GHz and up-link frequency 30GHz.
A) C band
B) Ku band
C) Ka band
D) Ca band
18. The electromagnetic web having the wavelength from 1Km to 100M are known as ………….
A) Long Waves
B) Medium Waves
C) Short Waves
D) Micro Waves
19. The electromagnetic wave having the wavelength from 10Km to 1Km are known as ……….
A) Long Waves
B) Medium Waves
C) Short Waves
D) Micro Waves
20. In satellite communication, the bandwidth of each transponder is …………… and it can handle ………….. at a time.
A) 24 MHz, 8 Channels
B) 32 MHz, 10 Channels
C) 36 MHz, 12 Channels
D) 38 MHz, 16 Channels
Answers
1. D) Infrared Waves
2. B) Short Waves
3. B) infrared light
4. C) IRDA-C
5. D) IRDA-D
6. C) IRDA-C
7. A) infrared
8. C) Attenuation
9. C) Broadcast
10. A) i and ii only
11. A) i, ii and iii only
12. D) All i, ii and iii
13. C) i, ii and iv only
14. A) False, True, True
15. A) C band
16. B) Ku band
17. C) Ka-band
18. B) Medium Waves
19. A) Long Waves
20. C) 36 MHz, 12 Channels
Read Next: Top 20 MCQ Questions on Antennas and Propagation
