3D152 Vol. 3
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All the UREs from CDC 3D152
- 1.One disadvantage of microwave wavelengths is that the frequencies are susceptible to
- A.
Line noise
- B.
Weather effects
- C.
Frequency distortion
- D.
Electromagnetic interference
- 2.What is not a factor in determining the refractive index of air?
- A.
Atmoshperic pressure
- B.
Propogation medium
- C.
Temperature
- D.
Moisture
- 3.The determining factor in calculating the correct size of a waveguide is
- A.
Frequency
- B.
Power output
- C.
Bandwidth of the transmission medium
- D.
Distance between equipment and transmitter
- 4.How many miles above Earth are satellites placed into orbit?
- A.
2,230
- B.
2,320
- C.
22,300
- D.
23,200
- 5.Which satellite communications system is used to transmit space operations?
- A.
Milstar Communication System
- B.
Defense Satellite Communications System (DSCS)
- C.
Air Force Satellite Communications (AFSATCOM)
- D.
Ground Mobile Forces Satellite Communications (GMFSC)
- 6.To transmit an audio signal over radio frequency (RF), it first has to be
- A.
Phase shifted
- B.
Transmitted
- C.
Modulated
- D.
Encoded
- 7.Broadband refers to a technology that can transmit
- A.
A relatively wide range of frequencies
- B.
Only high frequency information
- C.
A relatively wide range of amplitudes
- D.
Only high amplitude information
- 8.Broadband technology uses all of these transmission mediums except?
- A.
Telephone lines
- B.
Television cable lines
- C.
Satellite systems
- D.
Laser light
- 9.Which is not a disadvantage of laser light transmission?
- A.
No need for careful alignment of transmitter and receiver
- B.
Cannot penetrate even very thin curtains of paper
- C.
Sensitive to atmospheric interference
- D.
Strictly line-of-sight (LOS) transmission
- 10.How many B and D channels does the standard configuration in North American Integrated Services Digital Network (ISDN) primary rate interface (PRI) application use?
- A.
2, 1
- B.
30, 2
- C.
1, 24
- D.
23, 1
- 11.When a telephone network is circuit switched , each call
- A.
Is broadcast over multiple paths between switches
- B.
Is packetized and transmitted in circuitous
- C.
Has a dedeicated circuit created by the switch
- D.
Requires a dedicated switch to make the connection
- 12.What is the primary driving factor behind the invention of the telephone exchange?
- A.
Point-to-point telephone access caused cabling issues
- B.
The invention of the multi-line telephone
- C.
Military communication requirements
- D.
Radio communication requirements
- 13.What is the most serious threat to voice network system integrity?
- A.
Subversion
- B.
Unauthorized monitoring
- C.
Inexperienced switch technicians
- D.
Inadequate maintenance practices
- 14.What is one path high frequency (HF) transmissions follow from the antenna to the distant end?
- A.
Lightwave
- B.
Microwave
- C.
Soundwave
- D.
Groundwave
- 15.Which models of the digital multiplex system (DMS) family are commenly used at Air Force bases to provide base telephone services?
- A.
DMS-100 and Meridian System Logic (MSL)-100
- B.
DMS-100/200 and MSL-100
- C.
DMS-100/200 and DMS-200
- D.
DMS-200 and MSL-100
- 16.How many serial data interface ports does ther Meridian Option 11C Small System Controller have?
- A.
32
- B.
12
- C.
3
- D.
1
- 17.The Integrated Services Digital Network (ISDN) configuration normally used to connect switches together is the
- A.
Basic rate interface
- B.
Primary rate interface
- C.
Trunk rate interface
- D.
Switch rate interface
- 18.The three cornerstones of voice network system security are availability,
- A.
Circumvention, and confidentiality
- B.
Circumvention, and disclosure
- C.
Confidentiality, and integrity
- D.
Disclosure, and integrity
- 19.What role does the Private Branch Exchange (PBX) play in the telephony industry?
- A.
A medium scale switch that handles traffic for a small city
- B.
A very small scale switch that is also known as a key system
- C.
A large scale switch that handles the traffic for a metropolitan area
- D.
A small scale switch that handles internal calls for an organization
- 20.Which elements make up the control component of the SuperNode central control?
- A.
Computing mode (CM) and message switches (MS)
- B.
CM and system load module (SLM)
- C.
Central processing unit (CPU) and control monitor unit (CMU)
- D.
CPU, digital signal (DS), and peripheral module (PM)
- 21.What link is used to connect the digital multiplex system (DSM)-core to the DMS-bus?
- A.
DS-1
- B.
DS-30
- C.
DS-30A
- D.
DS-512
- 22.Which major component of the NorTel digital switching system (DSS) interfaces line and trunk subscribers?
- A.
Central control
- B.
Input/output (I/O)
- C.
Peripheral module (PM)
- D.
Peripheral subsystem (PS)
- 23.Base cables normally enter the central office (CO) facility through a
- A.
Cable manhole
- B.
Telecommunications cable closet
- C.
Building cable raceway
- D.
Cable vault
- 24.The primary reason you should measure the voltage across terminal or distribution frame protectors before removing and replacing them is to
- A.
Verify the circuit is not in use
- B.
Prevent interruptions to critical circuits
- C.
Ensure dangerous voltages are not present on the line
- D.
Avoid activating alarm circuits
- 25.What components are directly connected to the input/output controller (IOC)?
- A.
Printers, visual display unit (VDU), and tape drives
- B.
A pair of SuperNode message controllers and the device controllers
- C.
A maintenance and administration postion (MAP)
- D.
The central processing unit (CPU) and keyboard
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