Deck 13: Wireless Communications and National Electrical Code Article 810

Question 1

A typical C-band satellite will include twenty-four transponders, all on separate channel frequencies.

Answer 1

True

Question 2

Satellite transmission and reception occurs over what range of frequencies?

A) Kilo Hz
B) Mega Hz
C) Giga Hz
D) Terra Hz

Answer 2

C

Question 3

A satellite dish is a microwave antenna.

Answer 3

True

Question 4

What standard applies to higher speed LANs, supporting data rates up to 54 Mbps, at 5 GHz.

A) 802.11a
B) 802.11b
C) 802.11g
D) Bluetooth

Question 5

Wireless transmissions are more secure than hard-wired transmissions.

Question 6

A transponder is an example of a _________.

A) Switch
B) Gateway
C) Repeater
D) Server

Question 7

What type of antenna is typically used for television reception and the UHF frequency bands?

A) Broadband
B) Yagi
C) Dipole
D) Parabolic Dish

Question 8

Antenna alignment is critical to the quality of reception.

Question 9

The purpose of a phase array antenna system ________.

A) To broadcast and omni-directional signal
B) To act as a filter
C) To transmit simultaneously on multiple frequencies
D) To increase the radiation pattern and overall gain of transmission

Question 10

There are an unlimited number of communication channels.

Question 11

AM antennas are physically smaller than that of FM antennas.

Question 12

According to the National Electrical Code, lead-in conductors for transmitting stations must be mounted at least ________ clear of the surface of the building.

A) 3 inches
B) 12 inches
C) 3 ft.
D) 6 ft.

Question 13

A basic antenna element is tuned to ________the wavelength of a carrier frequency.

A) 1/8
B) 1/4
C) 1/2
D) 3/4

Question 14

The job of a transmitter is to send a signal source over a communication channel.

Question 15

For a radio station to transmit an intended signal, their operating frequency must be tuned to a specific carrier frequency.

Question 16

The antenna element of a receiving dish antenna is a waveguide called a/an __________.

A) LNB
B) Repeater
C) Transponder
D) Gateway

Question 17

Digital signals have only two possible output variations.

Question 18

A half-duplex system can only transmit a signal .

Question 19

What is roaming?

A) Communicating without actually making a dialed call
B) Jumping from cell tower to cell tower
C) The act of traveling and communicating between adjacent cells
D) Transmitting and receiving from multiple towers at one time

Question 20

What standard provides a short-range communication link between peripheral devices and a computer, typically 10 cm to 10 m apart.

A) 802.11a
B) 802.11b
C) 802.11g
D) Bluetooth

Question 24

A small-range cellular repeater system intended for indoor use, to allow for an extended use of cell phones is called _________.

A) Pico cell
B) Cell tower
C) Transmitting station
D) Wideband

Question 25

The propagation delays for LEO satellites will be in________.

A) microseconds
B) milliseconds
C) seconds
D) minutes