Semester 1 : Chapter 4

Question 1:
Which type of electrical circuit will have a continuously varying voltage-versus-time graph?

A.   DC
B.   analog
C.   digital
D.   open

Question 2:
When measuring voltage with a multimeter which setting must be set?
A.   AC or DC
B.   polarity
C.   frequency
D.   amperage range

Question 3:
Which term best describes the delay of a network signal?
A.   dispersion
B.   jitter
C.   latency
D.   attenuation

Question 4:
What are the three parts of an atom?
A.   electron, neutron, positron
B.   proton, nucleus, orbit
C.   neutron, electron, proton
D.   proton, nucleus, positron

Question 5:
A multimeter can be used to measure which of the following?
A.   voltage, current, frequency
B.   voltage, resistance, continuity
C.   continuity, voltage, noise
D.   noise, voltage, continuity

Question 6:
What is the primary cause of crosstalk?
A.   cable wires that are too large in diameter
B.   too much noise in a cable's data signal
C.   electrical motors and lighting
D.   electrical noise from other wires in a cable

Question 7:
What is the opposition to the movement of electrons as they move through materials?
A.   current
B.   resistance
C.   ohms
D.   voltage

Question 8:
Which best describes an insulator?
A.   Any material with a low resistance to electrical current.
B.   Any material with a high resistance to electrical current.
C.   Any highly malleable metal.
D.   Any material that cannot transmit currents over 110 volts.

Question 9:
Which term best describes two devices communicating on a shared-medium at the same time?
A.   latency
B.   dispersion
C.   collision
D.   obstruction

Question 10:
Which of the following would represent a DC source of electricity?
A.   an electrical generator
B.   a car or flashlight battery
C.   a magnet
D.   a steam engine

Question 11:
Which describes cancellation in cabling?
A.   Wires in the same circuit cancel each other's electrical current flow.
B.   Twisting of wire pairs provides self-shielding within the network media.
C.   The magnetic fields from separate cables cancel magnetic fields of another cables.
D.   External magnetic fields cancel the fields inside network cabling.

Question 12:
What are the three required parts of an electrical circuit?
A.   switch, source or battery, load or resistance
B.   source or battery, complete path, switch
C.   source or battery, complete path, load or resistance
D.   power, source or battery, load or resistance

Question 13:
What kind of schemes are Manchester and NRZ?
A.   encoding
B.   decoding
C.   encrypting
D.   decrypting

Question 14:
In electrical terms, what does AC mean?
A.   alternating current
B.   attenuating current
C.   amplitude current
D.   amplified current

Question 15:
What is propagation of a network signal?
A.   travel
B.   delay
C.   attenuation
D.   latency
Question 16:
Where is the safety ground connected on a computer?
A.   exposed metal parts
B.   the monitor
C.   the mouse
D.   the network connection

 Question 17:
What is the unit of measure for resistance?
A.   volt
B.   ohm
C.   amp
D.   joule

 Question 18:
What is attenuation?
A.   travel
B.   delay
C.   a signal losing strength to its surroundings
D.   a signal gaining strength from its surroundings

 Question 19:
What is the result of impedance mismatch?
A.   reflected energy
B.   power sags
C.   brown outs
D.   power surges

 Question 20:
What is the best definition of voltage?
A.   force or pressure caused by the separation of electrons and protons
B.   the measurement of electron flow in an electrical circuit
C.   the opposition to electron flow in a circuit
D.   the absence of electron flow in a circuit

 Question 21:
How many bits compose 1 byte?
A.   2
B.   4
C.   8
D.   255

 Question 22:
Which term describes the conversion of binary data into a form that can travel on a physical communications link?
A.   encoding
B.   decoding
C.   encrypting
D.   decrypting

 Question 23:
What is the best definition of electrical current?
A.   force or pressure caused by the separation of electrons and protons
B.   the measurement of electron flow in an electrical circuit
C.   the opposition to electron flow in a curcuit
D.   the absence of electron flow in a curcuit

 Question 24:
Which is an external source of electrical impulses that can attack the quality of electrical signals on a cable?
A.   EMI caused by electrical motors
B.   EMI caused by DC Batteries
C.   impedance caused by radio systems
D.   EMI caused by fiber optic cable