MCQOPTIONS
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MCQOPTIONS
This section includes 22 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
DNS stands for __________ |
| A. | Domain Name Server |
| B. | Domain Name System |
| C. | Domain Name Society |
| D. | Domain Name Security |
| Answer» B. Domain Name System | |
| 2. |
The real part of an antenna's input impedance is due to ________ |
| A. | SWR |
| B. | radiated signal |
| C. | reflected signal |
| D. | refracted signal |
| Answer» C. reflected signal | |
| 3. |
Which statement is true about a DNS? |
| A. | has become obsolete on the Internet |
| B. | translates words to numbers |
| C. | stores all domain addresses |
| D. | it has no relation with servers |
| Answer» C. stores all domain addresses | |
| 4. |
If the modulating frequency of a carrier wave varies between 100Hz and 100KHz, find it's bandwidth? |
| A. | 100 KHz |
| B. | 230.2 KHz |
| C. | 199.8 KHz |
| D. | 123.6 KHz |
| Answer» D. 123.6 KHz | |
| 5. |
A 'thin' client is a ________ |
| A. | PC with no disk drives |
| B. | Node that rarely accepts data |
| C. | Node that rarely sends data |
| D. | Node which is active for short period of time |
| Answer» B. Node that rarely accepts data | |
| 6. |
IP stands for ________ |
| A. | Internet Protocol |
| B. | Internet Process |
| C. | Interconnected Protocol |
| D. | Interconnected People |
| Answer» B. Internet Process | |
| 7. |
The radiation of energy from an antenna can be seen in the ________ |
| A. | standing wave around antenna |
| B. | radiation resistance of the antenna |
| C. | reflected resistance of the antenna |
| D. | I2R loss of the antenna |
| Answer» C. reflected resistance of the antenna | |
| 8. |
AM waves is represented by Et cos? ?c t. What does Et denotes? |
| A. | amplitude of modulated wave |
| B. | amplitude of carrier signal |
| C. | amplitude of modulating signal |
| D. | amplitude of message signal |
| Answer» B. amplitude of carrier signal | |
| 9. |
An antenna's beamwidth is measured ________ |
| A. | from +90° to -90° |
| B. | between half power points |
| C. | between the minor side lobes |
| D. | between the major side lobes |
| Answer» C. between the minor side lobes | |
| 10. |
'Ground Effect' in antenna caused by ________ |
| A. | faulty connection of the feed cable ground |
| B. | fading |
| C. | buildings and other structures on ground |
| D. | radio signals reflecting off the ground |
| Answer» E. | |
| 11. |
The polarization of plane waves received from satellite is changed by ________ |
| A. | Faraday rotation |
| B. | Gamma rays |
| C. | Helical rotation |
| D. | Distance travelled |
| Answer» B. Gamma rays | |
| 12. |
What is the input impedance to a lossless antenna, at resonance? |
| A. | infinite |
| B. | 0 |
| C. | resistive |
| D. | capacitive |
| Answer» D. capacitive | |
| 13. |
Which among the following is not a reason for the use of antenna coupler? |
| A. | To make the antenna look resistive |
| B. | To provide the output amplifier with correct load impedance |
| C. | To discriminate against harmonics |
| D. | To prevent re-radiation of the local oscillator |
| Answer» E. | |
| 14. |
Arrays in antenna can be __________ |
| A. | phased |
| B. | driven |
| C. | parasitic |
| D. | phased, driven or parasitic |
| Answer» E. | |
| 15. |
What is the typical bandwidth of a 2-wire telephone line? |
| A. | 20 Hz to 6 KHz |
| B. | 300 Hz to 3.4 KHz |
| C. | 20 Hz to 20 KHz |
| D. | 200 Hz to 6.5 KHz |
| Answer» C. 20 Hz to 20 KHz | |
| 16. |
An antenna can be matched to a feed line by using an LC network only. |
| A. | True |
| B. | False |
| Answer» C. | |
| 17. |
Antennas are often tested in ________ |
| A. | an RF reflective chamber |
| B. | a vacuum chamber |
| C. | an anechoic chamber |
| D. | atmosphere |
| Answer» D. atmosphere | |
| 18. |
Which one of the following consists of non-resonant antennas? |
| A. | folded dipole |
| B. | simple dipole |
| C. | rhombic antenna |
| D. | broadside array |
| Answer» D. broadside array | |
| 19. |
Which one of the following is very useful as a multiband HF receiving antenna? |
| A. | folded dipole |
| B. | log periodic |
| C. | conical horn |
| D. | rectangular horn |
| Answer» C. conical horn | |
| 20. |
The energy picked up by a parabolic antenna is concentrated at the ________ |
| A. | edges |
| B. | center |
| C. | corners |
| D. | focus |
| Answer» E. | |
| 21. |
Which of the following term is not applied to the Yagi-Uda array? |
| A. | low impedance |
| B. | high gain |
| C. | good bandwidth |
| D. | high reception of signals |
| Answer» C. good bandwidth | |
| 22. |
An array with one driven element, a reflector, and one or more directors is called ________ |
| A. | Yagi |
| B. | Marconi |
| C. | Simple Dipole |
| D. | Folded Dipole |
| Answer» B. Marconi | |