## Cellular Concepts MCQ

Cellular Concepts MCQ, Multiple Choice Questions on Cellular Concepts, MCQ on Cellular Concept, Mobile Communication Objective Questions, Mobile Communication MCQ, Engineering MCQ,

### Objective Type Questions

Q.1. The following are the elements of the cellular mobile radio system.

- Receiver and transmitter
- Mobile unit and control unit
- C/I reduction factor and cell splitting
- Hand-off and receiver

**Answer: **C/I reduction factor and cell splitting

Q.2. If the average calling time is T and maximum calls in one hour in one cell is Q_{i} then the offered load will be,

- Q
_{i}^{2}T - Q
_{i}T/60 - Q
_{i}T^{2} - Q
_{i}T/30

**Answer: **Q_{i}T/60

Q.3. The concept of repeating the same frequency is known as …………….. and the cells using the same frequencies are known as …………………..

- Cell splitting, adjacent cells
- Frequency reuse, adjacent channels cells
- Frequency reuse, co-channel cells
- Cell sectoring cells

**Answer: **Frequency reuse, co-channel cells

Q.4. If ‘D’ is the distance between two co-channel cells and ‘R’ is the cell radius then D/R is known as

- Adjacent channel interference reduction factor
- Co-channel interference reduction factor
- Adjacent and co-channel interference reduction factor
- None of the above

**Answer: **Co-channel interference reduction factor

Q.5. If N is the reuse pattern and R is the radius of a cell, then, frequency reuse distance (D) is given as

- D=3NR
- D=3N^{2}\sqrt{R}
- D=3NR^{2}
- D=(\sqrt{3N})R

**Answer:** D=(\sqrt{3N})R

Q.6. For N = 4 and N = 19 reuse cellular patterns, the frequency reuse distance are ……… and ……..

- 3.46 R and 4.6 R
- 3.46 R and 6 R
- 6 R and 7.55 R
- 3.46 R and 7.55 R

**Answer: **3.46 R and 7.55 R

Q.7. In an N cell reuse pattern, the equation of N is,

- N = (i + j)
^{2} - N = i
^{2}+ ij + j^{2} - N = i + j + 2j
- N = j + 2i

**Answer: **N = i^{2} + ij + j^{2}

Q.8. For N = 7 reuse pattern, the co-channel interference reduction factor q is ……..

- D/R = 5.6
- D/R = 7.6
- D/R = 6
- D/R = 4.6

**Answer: **D/R = 4.6

Q.9. When the mobile moves from the original cell to a new cell and the call in progress has to be continued smoothly. It is known as,

- Cell sectoring
- Handoff technique
- Desectorization
- Coverage

**Answer:** Handoff technique

Q.10. The cell splitting is done as per traffic demand available in the cell is known as,

- Permanent cell splitting
- Dynamic cell splitting
- Semi-permanent splitting
- Static cell splitting

**Answer: **Dynamic cell splitting

Q.11. In general, after cell splitting technique new cell radius is

- (Old cell radius)
^{2} - (Old cell radius)
^{3} - Old cell radius/π
- Old cell radius/2

**Answer: **Old cell radius/2

Q.12. MTSO does the following functions

- Performs all internal switching of the calls
- Does not perform internal switching
- Autonomously locates mobile
- Manages data communication

**Answer: **Performs all internal switching of the calls

Q.13. In cellular system antennas, the front-to-back ratio of directional antenna is ……………….. in free space and ………… in cell site.

- 30 dB, 12 dB
- 20 dB, 10 dB
- 10 dB, 15 dB
- 40 dB, 30 dB

**Answer: **20 dB, 10 dB

Q.14. Interference in neighboring cells is reduced by ……………….

- Antenna tilting
- Gain adjustment
- Impedance
- Antenna height

**Answer: **Antenna tilting

Q.15. The capacity of the switching system in the cellular system is based on the following.

- Number of switch ports
- Battery condition
- Reducing switch ports
- Processor capacity

**Answer: **Processor capacity

Q.16. The service life of switching equipment is not determined by,

- How long it takes to attain its full capacity
- Temperature
- Life cycle of equipment
- None of the above

**Answer: **Life cycle of equipment

Q.17. To increase the capacity of the equipment in case of designing switching equipment as modules is

- Modules distribution
- Modules can be reduced
- More modules can be added
- Modules need not altered

**Answer: **More modules can be added

Q.18. Data line …………………..

- Cannot carry multiple channel data
- Can carry multiple cannel data
- Is not affected by cellular system
- Is affected by cellular system

**Answer: **Can carry multiple cannel data

Q.19. The macro and microcells are available in,

- Handoff
- Cell sectorization
- Co-channel cellular region
- Umbrella cell pattern

**Answer: **Umbrella cell pattern

Q.20. Consider there are 5 cell sites C1 to C5. A user enters from 1 cell site to another cell with 4 rain. If all the cells are of equal distance at 12 min from stating point in which cell the user will be?

- In C4
- At boundary of C3
- In C5
- In C2

**Answer: **In C4

Q.21. The cell using different carrier frequencies in a cluster is

- Co-channel cell
- Macro cell
- Adjacent cell
- Micro cell

**Answer: **Adjacent cell

Q.22. If the cluster size N = 19 then the shift parameters (i, j) are

- 2, 3
- 1, 3
- 3, 3
- 3, 2

**Answer: **3, 2

Q.23. If the average calling time is T and maximum calls in one hour in one cell is Q then the offered load (A) in erlangs will be,

- A = Q
^{2}T/360 - A = QT/60
- A = QT
^{2}/30 - A = QT/120

**Answer: **A = QT/60

Q.24. In Q.23, if Q is 4000, T is 1.76 min, the offered load will be ……………

- 119
- 117
- 216
- 115

**Answer: **117

Q.25. In Q.23, if Q is 29000 calls per hour, blocking probability is 2% and T is 1.76 min, then offered load is …………..

- 8620
- 7650
- 850
- 450

**Answer: **850