Tag: importance of transport system

Questions Related to importance of transport system

Match List-1 with List-2. 

List-1 List-2
a. Point to point communication e. RADAR
b. broadcast communication f. AM radio
c. Line of sight g. FM radio communication
d. Satellite communication h. Traditional telephony
i. Mobile telephony
j. TV
evs - i communication and mass media understanding communication and impact of mass media satellites in communication importance of transport system artificial satellite

  1. a-h; b-f,g,j; c-e; d-i,j

  2. a-e; b-i,j; c-h; d-g,f

  3. a-f ; b-h,i,j; c-g; d-e

  4. a-g; b-f,g,j; c-e; d-i,j

Show answer
Correct Option: A
Explanation:
(a-h): A point-to-point connection refers to a communications connection between two nodes or endpoints.
(b-f, g ,j): Reaches a wider range at faster speed.
(c-e) Line of sight is a type of propagation that can transmit and receive data only where transmit and receive stations are in view of each other without any sort of an obstacle between them.
(d-i, j) Signal transferring between the sender and receiver is done with the help of satellite.

The frequency of transmission of a ratio station is $30\, MHz$. The wavelength of the waves transmitted by the centre will be- 

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  1. $5$ meter

  2. $10$ meter

  3. $15$ meter

  4. $20$ meter

Show answer
Correct Option: B

Long range transmission of TV-signal is done by

evs - i communication and mass media understanding communication and impact of mass media satellites in communication importance of transport system artificial satellite

  1. space wave

  2. sky wave

  3. ground wave

  4. artificial satellite

Show answer
Correct Option: D
Explanation:

TV-signal ( $30: MHz$ - $300:MHz$) are not reflected by ionosphere. Therefore, sky-wave propagation is not possible and similarly ground and space wave is also not feasible. Hence, they are transmitted to artificial satellite from where they are transmitted back to the Earth.

What fraction of the surface area of earth can be covered to establish communication by one geostationary satellite?

evs - i communication and mass media understanding communication and impact of mass media satellites in communication importance of transport system artificial satellite

  1. $\displaystyle\frac{1}{2}$

  2. $\displaystyle\frac{1}{3}$

  3. $\displaystyle\frac{1}{4}$

  4. $\displaystyle\frac{1}{8}$

Show answer
Correct Option: B
Explanation:

We uses three geostationary satellites placed at the vertices of an equilateral triangle, then the entire earth can be covered by the communication network, each satellite covers $1/3$ of the globe.

A ground receiver station is receiving a signal at (a) 5 MHz and (b) 100MHz, transmitted from a ground transmitter at a height of 400m located at a distance of 125km. Identify whether it is coming via space wave or sky wave propagation or satellite transponder. Radius of earth = $6.4\times { 10 }^{ 6 }m$; maximum number density of electrons in ionosphere = ${ 10 }^{ 12 }{ m }^{ -3 }$ 


evs - i communication and mass media understanding communication and impact of mass media satellites in communication importance of transport system artificial satellite

  1. $9MHz$

  2. $5MHz$

  3. $4MHz$

  4. All of these.

Show answer
Correct Option: A
Explanation:
Height of the ground transmitter $=30\ cm$
Range of transmission $=100\ km$
maximum distance covered by space wave propagation is
$d=\sqrt{2\ Rh}$
$=\sqrt{2\times 64\times 10^{6}\times 300}$
$=62\ km$
critical frequency for ionospheric propagation is, 
$F _{C}=9(N _{max})^{112}$
$=9(10^{12})^{112}$
$=9\times 10^{6}=9\ MHZ$
Which is not a means of communication?
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  1. Telephone

  2. Books

  3. Table

  4. None of these

Show answer
Correct Option: C
Explanation:

Table is not a means of communication.

______ are large consumers of space with the lowest level of physical constraints among transportation modes.

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  1. Railways

  2. Maritime routes

  3. Air routes

  4. Road infrastructures

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Correct Option: D

Which of the following is an example of mass communication?

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  1. Telephone

  2. Email

  3. Letter

  4. Newspaper

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Correct Option: D

______ mode of transportation is widely used to transport petroleum products, processed coal, drinking water, natural gas etc. from one place to another place among other modes.

organisation of commerce and management tertiary and quaternary economic activities importance of transport system importance of transportation system introduction to transport and communication

  1. Pipeline Transport System

  2. Rope-way Transport System

  3. Water Transport System

  4. Canal system

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Correct Option: A

____________ is actual, physical movements of goods and people between two points.

organisation of commerce and management tertiary and quaternary economic activities importance of transport system importance of transportation system introduction to transport and communication

  1. Logistics

  2. Communication

  3. Transportation

  4. Email

Show answer
Correct Option: C