Below are the answers key for the Multiple Choice Questions in Antennas – MCQs Part 9.

401. Acts as an antenna array

402. The rhombic antenna

403. Log-periodic

404. Horn

405. Protection of personnel working underneath

406. To prevent reradiation of the local oscillator

407. Marconi

408. Protection of personnel working underneath

409. High gain

410. Helical

411. Isotropic antenna

412. Effective height

413. Allow the feed to be places at a convenient point

414. Reduce the bulk of the lens

415. Circular polarization

416. Useful as a UHF receiving antenna

417. Log-periodic

418. Vertical

419. Angle of elevation

420. Rhombic

421. Orthomode transducer

422. 10.89 times

423. Standing waves

424. 200 kph

425. 3

426. Dummy antenna

427. Antenna

428. 28.17 dB

429. bi-directional

430. Aperiodic

431. Dipole

432. Low-pass filter

433. 1.76 dB

434. Circular polarization

435. Smith chart

436. Isotropic

437. Effective isotropic radiated power

438. Spot beam

439. Fresnel

440. TVRO

441. Omnidirectional

442. Major lobe radiation

443. Parasitic elements

444. Reflectometer

445. ERP

446. Adding C in series

447. Gain of the antenna

448. Hertz

449. The numeric ratio relating the radiated signal strength of an antenna to that of another antenna

450. Broadside array

### Online Questions and AnswersSeries

Following is the list of Practice Exam Test Question in this brand new series:

**Antennas MCQs**

**MCQs from Number 1 – 50**Answer key:

**PART I**

**MCQs from Number 51 – 100**Answer key:

**PART II**

**MCQs from Number 101 – 150**Answer key:

**PART III**

**MCQs from Number 151 – 200**Answer key:

**PART IV**

**MCQs from Number 201 – 250**Answer key:

**PART V**

**MCQs from Number 251 – 300**Answer key:

**PART VI**

**MCQs from Number 301 – 350**Answer key:

**PART VII**

**MCQs from Number 351 – 400**Answer key:

**PART VIII**

**MCQs from Number 401 – 450**Answer key:

**PART IX**

**MCQs from Number 451 – 500**Answer key:

**PART X**