Deck 11: Telecommunications, and National Electrical Code Article 800

Question 1

The MDF is located in the basement of the building or on the first floor.

Answer 1

True

Question 2

The demarcation point in any residential dwelling consists of a ________.

A) Gas arrestor
B) 42A block protector
C) RJ-11 block protector
D) RJ-45 block protector

Answer 2

B

Question 3

A typical residential phone system is wired using _____.

A) POTS wire
B) Fiber Optic Cable
C) Copper Clad Aluminum Wire
D) Coaxial Cable

Answer 3

A

Question 4

According to the National Electrical Code , all communications cables should be rated for not less that 150 V.

Question 5

Adding more capacitance to a telephone line will decrease the amount of crosstalk.

Question 6

The tip wire is connected to ground and the ring wire is connected to _____.

A) 3 or 6 V
B) 6 V
C) 12 or 24 V
D) -48 V

Question 7

Each exchange can have a maximum of 5,000 phone lines.

Question 8

If you are dialing a number in the same area code as you, you don't have to dial all 10 digits.

Question 9

The telephone in your house is connected back to the telephone company's central office (TELCO) over a pair of wires known as the "local loop".

Question 10

When the phone is on the hook the internal "hook switch" is open.

Question 11

A Private Branch Exchange (PBX) is typically found in residential dwelling especially single-family homes.

Question 12

Which of the following represents the possible "tip" and "ring" wires of a telephone system?

A) Green and Red
B) Black and Yellow
C) Blue and White
D) All the above

Question 13

The standard termination for commercial telephone wiring is a __________.

A) RJ-11 jack
B) RJ-14 jack
C) RJ-45 jack
D) Punch-down block

Question 14

In a 7-digit phone number, the first three digits represent the _________.

A) Area code
B) Trunk line
C) Exchange
D) Switch

Question 15

The wiring running from the MDF to the IDFs that complete a floor-to-floor run uses a riser cable.

Question 16

A dial tone is modulated at ___________ and is constant.

A) 350Hz
B) 530Hz
C) 600Hz
D) 1000Hz

Question 17

The TELCO must supply enough power to ring all the phones connected to a given telephone line.

Question 18

According to the National Electrical Code, Communications cables can be run in the same raceway or enclosure as _________ conductors.

A) Electric light and power
B) Class 1
C) Class 3 only
D) Class 2  and Class 3

Question 19

Which color combination is typically used as pair 1 on communication wire?

A) Red and green
B) Black and yellow
C) Blue and white
D) Brown and orange

Question 20

The telephone wires inside your house are called _________.

A) The demarc
B) The local loop
C) Premise wiring
D) Vertical wiring