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

401. waveguide

402. horn

403. horizontally

404. can cook

405. Transmit-Receive Mixer

406. diode

407. ATR

408. 30 MHz or higher

409. klystron

410. Tunnel diode

411. receiving

412. plate

413. 10 – 15 microseconds

414. limit the audio signal

415. video gain

416. IF gain

417. Just enough to produce light flicker on screen

418. cathode

419. intensifying pulse

420. variable lag angle

421. power-line AC

422. power-line AC

423. none

424. heading flash

425. testing only

426. radar endorsement

427. shows only moving target

428. calibrate discriminator output

429. ground speed indicator

430. sharper than maximums

431. 2

432. sky waves

433. Any of these

434. resolve a 180 degrees ambiguity

435. vertical

436. bends towards shore

437. nulls shift

438. nulls shifted

439. ground plus sky waves

440. sunset and sunrise

441. 45 degrees

442. 315 degrees

443. broadband amplifiers

444. 2182-kHz signal local oscillator

445. 75-Hz sideband

446. loop antenna

447. sense antenna

448. 1 kHz beat

449. any of these

450. any of these

### Online Questions and Answers Series

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

**Microwave Communications 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**